CASE STUDY: ASSESSING COMMUTER BUS SERVICE

Step 4 Calculate mode shares and the comparative speeds between auto and
transit. This step is needed for determining the relationship between mode
share and travel times. This will identify those travel sheds with compara-
tively slow service.

Select Step 4 from the menu and press M for Menu help with Step 4 or any other key to
complete Step 4 without menus. If M is pressed for menu help, the following screen and
sub-menu should appear:

A201: (W34] ‘MODPress M for Step 4 menus -- any other key for Step 4 w/out menus

A 8 c D i
201 MODE SHARES AND TRAVEL TIMES
202

203 Trips between CBD and:
204

205 Trvishd Trvlshd Trvlshd
206 1 2 3
270 natant nett enter eee

208 MODE SHARES

209 Percent Vehicle Trips

210 Percent Transit Trips

au

212 TRAVEL TIMES by MODE

213° Average Vehicle Commuting Time (minutes)
214 Average Transit Commuting Time (minutes)
215 ~~ Transit/Vehicle Travel Time Ratio

216

27

218

219

220

The following equations are used in Step 4:

© % vehicle trips = sum of all vehicle trips / total trips

e % transit trips = sum of all transit trips / total trips

Avg. vehicle commute time = sum of vehicle PHT / sum of vehicle trips

Avg. transit commute time = sum of transit PHT / sum of transit trips

 Vehicle/Transit travel time ratio = avg. vehicle commute time/avg. transit
commute time

55


1990 CTPP TABLE OUTLINES

Urban Element
Part 1-Tabulations by Area of Residence

Note: A colon(:) after an entry below indicates that the entry is a heading, not a data cell. The heading is a
modifier or descriptor of the categories indented beneath it, but no data are associated with the heading line.

1990 1980 Total number
Table Table Title of data cells
1-1. N/A TOTAL PERSONS(1) 1.0... 0 ec cse ec ce cece eee e eee e tenet ee ee tenn eenes 1
Universe: Persons
Total
1-2. N/A UNWEIGHTED SAMPLE COUNT OF PERSONS(1) ......... secs cesses cence ceeees 1
Universe: Persons
Total
1-3. N/A PERCENT OF PERSONS IN SAMPLE(1) ...... 00sec ececeeceeeeee eee teeens 1
Universe: Persons
Total
1-4. NIA TOTAL HOUSEHOLDS(1) . 1... cece ccc c cece cere eee e eee eee n eee en eee en ene 1
Universe: Households
Total
1-5. 1-4 HISPANIC ORIGIN(3) BY RACE(4) ....... cc cece cece eee eee e een eeneneeeee 12

Universe: Persons
Total, Hispanic origin:
All races
White
Black
Other
Not of Hispanic origin:
(Repeat RACE)
Hispanic origin:
(Repeat RACE)

1-6. 1-3 SEX(3) BY AGE(12) 0.0... eee cece eee eee cece eet e cence nee eeneeneeeae 36
Universe: Persons
Both sexes:
All ages
Under 16 years
16 and 17 years
18 to 20 years
21 to 24 years
25 to 34 years

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993 Page 1-1


CASE STUDIES
INTRODUCTION

The two following case studies are taken from case studies used as part of the
FHWA-sponsored Census Transportation Planning Package Applications Workshops (NHI
Course No. 15131). They are intended to demonstrate "hands on” application of the CTPP
data contained in tables from the Statewide and Urban Elements. The case studies use
a series of Lotus spreadsheet templates to illustrate CTPP applications. A diskette is
provided that includes all the templates needed for the case studies, plus additional case
studies used in the three day workshop.

The templates contain macro commands that automate the steps in the case
studies. As you begin working on the case studies, it is important that you follow the
instructions appearing in the upper right-hand corner of the screen. Those instructions
guide you through the necessary steps, in sequential order. You may exit from the macro
commands by typing "Q" or highlighting Quit from the case study menu that appears in the
upper left-hand side of the screen. This will allow you to review the spreadsheet templates
and calculation formulas. To get back into the macro commands after quitting, press the
“Alt" and "C" keys simultaneously. If you get off track from the macro commands, you
should exit from the program and re-start the case study. It is relatively easy to retrace
your steps. Again, it is very important that, at least initially, you follow the command
prompts that appear in the upper right-hand side of the screen.

Although these spreadsheet templates were developed in an earlier version of
Lotus 1-2-3, they should be able to work with current Windows-based spreadsheet
programs, such as Lotus, Quattro and Excel. If the macro commands do not work in other
software programs, you will need to use Lotus 1-2-3 version 2.2 to run the case study
templates. You should create a CTPP directory on your computer's hard drive and
copy the files from the diskette to it. The use of the Lotus environment for these
templates does not constitute an endorsement of the software on the part of FHWA or
other sponsoring agencies. You may work on the additional case studies, but the steps
and answers are not provided in this handbook.

A series of questions follow each step in the case study. The questions are
designed to make you think about how the data could be applied. The questions may not
always have a right or wrong answer; in several cases, you must use your experience and
intuition to determine an appropriate response. Suggested answers are provided at the

end of the case studies.

21


1990 1980
Table Table

Total number
Title of data cells

2-17. 1-14

2-18. N/A

1990 CTPP TABLE OUTLINES-Part 2 August 5, 1993 Page 2-8

VEHICLES AVAILABLE(6) BY MEANS OF TRANSPORTATION TO WORK(11) FOR
WORKERS IN HOUSEHOLDS
Universe: Workers 16 years and over in households
Total, vehicles available:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
No vehicles:
(Repeat MEANS OF TRANSPORTATION)
1 vehicle:
(Repeat MEANS OF TRANSPORTATION)
2 vehicles:
(Repeat MEANS OF TRANSPORTATION)
3 vehicles:
(Repeat MEANS OF TRANSPORTATION)
4 or more vehicles:
(Repeat MEANS OF TRANSPORTATION)

TIME OF ARRIVAL AT WORK(7) BY MEANS OF TRANSPORTATION(10)........+

Universe: Workers 16 years and over who did not work at home
Total, time of arrival at work:

All workers who did not work at home

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means
5:30 a.m. to 6:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
6:30 a.m. to 7:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)


1990

1980

Table Table

Total number
Title of data cells

2-4,

2-5.

2-6.

H1-3

N/A

1-8

SEX(3) BY CLASS OF WORKER(8) OF WORKERS .......... ce eeeese seen eens 24
Universe: Workers 16 years and over
Both sexes:
Total, class of worker
Private for profit wage and salary workers
Private not-for-profit wage and salary workers
Local government workers
State government workers
Federal government workers
Self-employed workers
Unpaid family workers
Male:
(Repeat CLASS OF WORKER)
Female:
(Repeat CLASS OF WORKER)

SEX(3) BY NUMBER OF HOURS WORKED LAST WEEK(6) OF WORKERS .......... 18
Universe: Workers 16 years and over
Both sexes:

Total, number of hours worked last week

Less than 15 hours

15 to 20 hours

21 to 34 hours

35 to 40 hours

Over 40 hours
Male:

(Repeat NUMBER OF HOURS WORKED LAST WEEK)
Female:

(Repeat NUMBER OF HOURS WORKED LAST WEEK)

SEX(3) BY MEANS OF TRANSPORTATION TO WORK(11) 0.0.0.0 ese eee eee eeees 33
Universe: Workers 16 years and over
Both sexes:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home

1990 CTPP TABLE OUTLINES-Part 2 August 5, 1993 Page 2-3




1990 CTPP TABLE OUTLINES

Statewide Element

Part C-Tabulations of Area of Residence by Area of Work

Note: A colon(:) after an entry below indicates that the entry is a heading, not a data cell. The heading is a
modifier or descriptor of the categories indented beneath it, but no data are associated with the heading line.

1990
Table

1980
Table

Total number
Title of data cells

C-1.

C-2.

C-3.

V-1

IV-3

IV-3

TIME LEAVING HOME TO GO TO WORK-TOTAL AND PEAK PERIOD(2) BY MEANS OF
TRANSPORTATION TO WORK(19) 00.0000 cece eect ener ete n tence een eennens 38
Universe: Workers 16 years and over who did not work at home
Total, time leaving home to go to work:

Workers who did not work at home

Drove alone

In 2-person carpool

In 3-person carpool

In 4-person carpool

In 5-person carpool

In 6-person carpool

In 7-to-9-person carpool

In 10-or-more-person carpool

Bus or trolley bus

Streetcar or trolley car

Subway or elevated

Railroad

Ferryboat

Taxicab

Motorcycle

Bicycle

Walked

Other means
Peak period (6:30 a.m. to 8:29 a.m.):

(Repeat MEANS OF TRANSPORTATION)

AGGREGATE NUMBER OF VEHICLES USED IN TRAVEL TO WORK(1) BY TIME

LEAVING HOME TO GO TO WORK-TOTAL AND PEAK PERIOD(2) ........---+00005 2
Universe:Workers 16 years and over using a car, truck, or van

Total, time leaving home to go to work

Peak period (6:30 a.m. to 8:29 a.m.)

WORKERS PER VEHICLE(1) BY TIME LEAVING HOME TO GO TO WORK-TOTAL

AND PEAK PERIOD(2) 00.0... . cece cece n cent cere eee ee rere ne eneeeeeenes 2
Universe: Workers 16 years and over using a car, truck, or van

Total, time leaving home to go to work

Peak period (6:30 a.m. to 8:29 a.m.)

1990 CTPP TABLE OUTLINES-Part C February 1, 1993 Page C-1


CASE STUDY: ASSESSING COMMUTER BUS SERVICE

|

ID Routes that are operating poorly
because of “other” factors

Questions to be answered:

1. Given the results from the last graph, which routes are operating much better than
expected?

2. Which routes are operating much worse than expected?

3. What other factors would you look for when evaluating the routes that operate
worse than expected?

64


1990 1980
Table Table __ Title

Total number
of data cells

(Repeat MEANS OF TRANSPORTATION TO WORK)

21 to 34 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)

35 to 40 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)

Over 40 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)

2-10. INl-4

1990 CTPP TABLE OUTLINES-Part 2

EARNINGS OF WORKERS(12) BY MEANS OF TRANSPORTATION(11)

Universe: Workers 16 years and over

With earnings:

All means of transportation
Drove alone

In 2-person carpool

In 3-person carpool

In. 4-or-more-person carpool
Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad
Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

Worked at home
Less than $5,000 or loss:

(Repeat MEANS OF TRANSPORTATION)
$5,000 to $9,999:

(Repeat MEANS OF TRANSPORTATION)
$10,000 to $14,999:

(Repeat MEANS OF TRANSPORTATION)
$15,000 to $19,999:

(Repeat MEANS OF TRANSPORTATION)
$20,000 to $24,999:

(Repeat MEANS OF TRANSPORTATION)
$25,000 to $29,999:

(Repeat MEANS OF TRANSPORTATION)
$30,000 to $34,999:

(Repeat MEANS OF TRANSPORTATION)
$35,000 to $49,999:

(Repeat MEANS OF TRANSPORTATION)
$50,000 to $74,999:

(Repeat MEANS OF TRANSPORTATION)
$75,000 or more:

(Repeat MEANS OF TRANSPORTATION)

No earnings:

(Repeat MEANS OF TRANSPORTATION)

August 5, 1993

Page 2-6


common personal computer formats. TransVU displays the available CTPP tables on one
side of the screen with maps on the other side, showing state and county boundaries,
place names, major roads and other geographic features. Users will be able to query and
extract the CTPP data through the map displays. Although TransVU is not mapping
software in the manner of a Geographic Information System and other software products,
users will be able to create rough thematic maps from the CTPP data.

Exhibit 3-2 shows a screen from TransVU that illustrates how the information is
organized. The exhibit shows the counties in the state of Delaware on the right-hand side,
and Table A-7, Sex by Employment Status, in spreadsheet format on the left side. The
highlighted column shows the total employment, including both sexes, for Kent County.
You can use the cursor or mouse to maneuver between data rows and columns. A series
of icons for different functions runs across the top of the screen. Once you display the
data, you may export the data in the table so that it can be manipulated in a variety of
spreadsheet or database software packages.

‘Column info.

Table A07: Sex by Employment Status

Column: Both sexes | Total employment
[status

Exhibit 3-2

TransVU runs under Microsoft Windows version 3.1, and includes an install
program. Hardware needs for TransVU require, at a minimum, a personal computer
running on an Intel 80386 chip or better, 4 MB of RAM, a hard disk and a CD-ROM drive.
Performance will depend on how many files the user moves from the CD-ROM to the hard
disk with the TransVU install program.

Instructions and a detailed discussion of the applications of TransVU are beyond

the scope of this handbook. The software is fairly self-explanatory, with a detailed help
feature. However, it is important to note that the software enables you to examine specific

75


Exhibit 2-2 illustrates the types of summaries that are available in the Urban
Element of the CTPP. In the exhibit, the urban area crosses a state boundary. The Urban
Element of the CTPP addresses this situation by providing detailed JTW characteristics
for the entire metropolitan area, despite state lines. In a manner similar to the Statewide
Element, residence and workplace summaries are available for individual TAZs, as well
as for the urbanized area defined by the Census Bureau, and a total for the entire MSA.

“TPP (Urban)

Exhibit 2-2

JTW flow information will be available among all defined TAZs within the MSA and
between internal TAZs and external counties and places. It should be emphasized that
travel flows are available within the MSA among all defined TAZs, despite the state or
county in which each TAZ is located.

CTPP Parts

Each element of the CTPP is divided into several parts. The Statewide Element is
divided into Parts A-F, and the Urban Element is divided into Parts 1-8 (note that the
Census Bureau did not use “Part 5" in its numbering scheme for the Urban Element). Each
part contains a collection of tables that define the population or households by Place of
Residence, Place of Work or by the characteristics of the JTW. For example, Part A of
the Statewide Element contains tables that describe population and household
characteristics by Place of Residence. Turn now to Appendix A, which contains a listing

11


1990 1980 Total number
Isble Table Title of data cells

1 worker in household
2 workers in household
3 workers in household
4 or more workers in household

1-17. NIA HOUSEHOLD SIZE(5) BY VEHICLES AVAILABLE(9) .......... esses eeer ences 45

Universe: Households
All households:

Total, vehicles available

No vehicles

1 vehicle

2 vehicles

3 vehicles

4 vehicles

5 vehicles

6 vehicles

7 or more vehicles
1 person in household:

(Repeat VEHICLES AVAILABLE)
2 persons in household:

(Repeat VEHICLES AVAILABLE)
3 persons in household:

(Repeat VEHICLES AVAILABLE)
4 or more persons in household:

(Repeat VEHICLES AVAILABLE)

1-18. N/A NUMBER OF WORKERS IN HOUSEHOLD(6) BY VEHICLES AVAILABLE(9) ......... 54

Universe: Households
All households:

Total, vehicles available

No vehicles

1 vehicle

2 vehicles

3 vehicles

4 vehicles

5 vehicles

6 vehicles

7 or more vehicles
No workers:

(Repeat VEHICLES AVAILABLE)
1 worker:

(Repeat VEHICLES AVAILABLE)
2 workers:

(Repeat VEHICLES AVAILABLE)
3 workers:

(Repeat VEHICLES AVAILABLE)
4 or more workers:

(Repeat VEHICLES AVAILABLE)

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993 Page 1-6


1990 1980
Table Table __Title

1-31. N/A

Total number
of data cells

In 6-person carpool

In 7-to-9-person carpool
In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad

Ferryboat

Taxicab

Motorcycle

Bicycle

Walked

Other means

Worked at home

TIME LEAVING HOME TO GO TO WORK(39)
Universe: Workers 16 years and over who did not work at home

Total

5:00 a.m. to 5:14 a.m.
5:15 a.m. to 5:29 a.m.
5:30 a.m. to 5:44 a.m.
5:45 a.m. to 5:59 a.m.
6:00 a.m. to 6:14 a.m.
6:15 a.m, to 6:29 a.m.
6:30 a.m. to 6:44 a.m.
6:45 a.m. to 6:59 a.m.
7:00 a.m. to 7:14 a.m.
7:15 a.m, to 7:29 a.m.
7:30 a.m. to 7:44 a.m.
7:45 a.m. to 7:59 a.m.
8:00 a.m. to 8:14 a.m.
8:15 a.m. to 8:29 a.m.
8:30 a.m. to 8:44 a.m.
8:45 a.m. to 8:59 a.m.
9:00 a.m. to 9:14 a.m.
9:15 a.m. to 9:29 a.m.
9:30 a.m. to 9:44 a.m.
9:45 a.m. to 9:59 a.m.
10:00 a.m. to 10:14 a.m.
10:15 a.m. to 10:29 a.m.
10:30 a.m. to 10:44 a.m.
10:45 a.m. to 10:59 a.m.
11:00 a.m. to 11:59 a.m.
12:00 p.m. to 12:59 p.m.
1:00 p.m. to 1:59 p.m.
2:00 p.m. to 2:59 p.m.
3:00 p.m. to 3:59 p.m.
4:00 p.m. to 4:59 p.m.
5:00 p.m. to 5:59 p.m.
6:00 p.m. to 6:59 p.m.

1990 CTPP TABLE OUTLINES-Part 1

August 5, 1993

Page 1-12




form. Because the labor force questions were not asked of everyone, the results had to
be factored to determine the total labor force within the place. This total estimate may or
may not be an accurate representation of the true labor force within the place. To
determine the probability that the estimated labor force total encompasses the true labor
force total within the place, the confidence interval shall be used. (The confidence interval
is determined by multiplying the standard error by the desired confidence level then adding
and subtracting the results to or from the estimate.)

Thus, if users wanted to be 90 percent sure that the confidence interval (Cl)
enclosed the true population of a true labor force total, the following equation would be
used:

179 X 1.645 = 294; Cl: 9,948 +294=10,242, 9,948 -294=9,654
(Where 179 is the standard error and 1.645 is the 90% confidence level factor)

Thus, we can be 90 percent assured that the true labor force in the place (estimated
by the Census Bureau in this example as 9,948) is somewhere within that confidence
interval.

Weighting

Weighting is used to factor Census long form results to 100 percent estimates.
Recall the labor force estimate used in the previous section. That total estimate had to be
factored from the one in six sample of the long form. The following steps were used by the
Census Bureau to weight long form responses:

e areas were defined for the weighting process and sampling plans deter-
mined for each area;

e long form questionnaires were sent randomly to households within the area
based on the sampling plan for that area;

° long form responses from the area were assigned an initial weight that is the
inverse of the probability of being selected;

° the initial weight was adjusted using a ratio developed from household and
person characteristics for that area based on 100 percent count information;
and,

e final weights were assigned to each long form response.

The actual weighting process took into account a number of household and person
characteristics, at several different levels, in order to make adjustments. CTPP users
should note that the weighting and its assumptions can present problems, especially when
dealing with Place of Work and JTW information. The possibility of mistakes in
“geocoding” (or attaching an address response to a census-defined geography level) may
further compound error in the CTPP. Place of Work and JTW tabulations must, therefore,

70


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE

1, Identify and Classify State's Urban Areas

1.1 Identify Urban Area Population

1.2. Classify Urban Areas

Questions to be answered:

Step 1.1

1.

What other CTPP Tables could you use to find each urban area's
population? Remember: (1) What information (universe) are we
trying to measure; (2) At what geographic level; and (3) What other
variables or characteristics of the universe are needed, if any?

As the population of an urban area increases, how would you expect
the following travel characteristics to change, if at all?

work trip rates per household

work trips lengths (daily/peak period)

work trip vehicle occupancies

the percentage of work trips made by transit
the percentage of peak period trips

28


1990 1980 Total number
Table Table Title of data cells

Subway or elevated
Railroad
Ferryboat

Taxicab
Motorcycle
Bicycle

Walked

Other means

4-53. N/A MEAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(19) 00.0.0 c cece cece cece cece een ence ene nee eee en en nes 19
Universe: Workers 16 years and over who did not work at home
Total
Drove alone
In 2-person carpool
In 3-person carpool
In 4-person carpool
In 5-person carpool
In 6-person carpool
In 7-to-9-person carpool
In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad
Ferryboat
Taxicab
Motorcycle
Bicycle
Walked
Other means

A-54. N/A STANDARD DEVIATION OF TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(19) 00.00. c cece cece eee n eee e cnet teen ence ence enn eee 19
Universe: Workers 16 years and over who did not work at home
Total
Drove alone
In 2-person carpool
In 3-person carpool
In 4-person carpool
In 5-person carpool
In 6-person carpool
In 7-to-9-person carpool
In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad
Ferryboat
Taxicab

1990 CTPP TABLE OUTLINES—Part A March 15, 1993 Page A-21


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE

LAr Eee ————E—eeeSEe—E_r_'

TRIP LENGTH VS. URBAN AREA SIZE

5. Determine Daily/Peak Trip Lengths

By Urban Area
CTPP Table(s) 5.1 orate eak
i ~~ %G. Identify Relationship Between ~~ Trip Distribution
Trip Length and Urban Area Size _ Model

Questions to be answered:

Step 5 1.

What are the universes of CTPP Tables used to identify travel times?
When is it appropriate to use median travel times?

CTPP reports perceived travel times that may differ from actual travel
times. How would you expect actual travel times to differ from
perceived travel times?

What is the average JTW travel time for River City?

35




CASE STUDY: ASSESSING COMMUTER BUS SERVICE

5.3. The following formula is used to calculate an estimated percent transit from

the regression equation calculated during Step 5.2:

Est. % Transit = Constant + X Coefficient * Travel Time Ratio

5.4. The confidence interval is a range that would include the true mean 9 out of
every 10 times this relationship is tested. We are 90% sure that travel
routes falling outside the confidence interval are so because of reasons
other than sampling error. The following equation is used to set the upper

confidence interval limit:

Upper confidence limit = % Est. Transit + Standard Error of Y Estimate (from

regression output)

5.5 The lower confidence interval limit is defined using the following equation:

Lower confidence limit = % Est. Transit - Standard Error of Y Estimate

H222: (P1) +F222-SES244
Step 5.1 Step 5.2 Step 5.3 Step 5.4 Step 5.5 Menu
Enter formula for calculating % transit

B c L} — F G

221 T-shed XVeh. Ratio X% Transit % Est. +

222 1 89.6% 1.31 10.4% 9.1% 13.5%
223 2 827K 1,25 17K 12.4% 168K
226 3 813% 1618 18.7% = 16.5% 21.0%
225 4 2% 1.36 0.8% 5.9% 10.3%
226 5 86.2% 1.26 13.8% 11.9% 16.3%
227 6 = B0.9% 1.13 19.1% 19.0% 23.4%
228 7 = -93.0% 1413 7.0% 19.2% 23.6%
229 B 95.9% 1.44 4.1% 1.3% 5.7%
230 9 93.3% 1.37 6.7% = 5.7% 10.2%
231 10 95.9% 1.33 4AK 7.6% 12.0%
232 WW 67.4% 1,00 32.9% 26.6% 31.0%
233 12° 82.3% 1.25 17.7K_— 124% 16.8%
234 13 (93.0% 1.33 7.0% 7.6% 12.0%
235 16 93.0% 1.29 7.0% 10.3% 14.8%
236 15 (97.3% 1.45 2.7% 1.1K 5.5%
237 16 93.1% 1.32 6.9% 8.1% 12.6%
238 17 93% 1.31 6.9% 9.0% 13.4%
239 18 93.4% 1.30 6.6% 9.4K 13.8%
240 19 95.9% 1.45 41K 10K 5.0%

cHD

MENU

60



1990

2-3.

1980 Total number
Table Table Title of data calls
Administrative support occupations, including clerical (303-402)
Private household occupations (403-412)
Protective service occupations (413-432)
Service occupations, except protective and household (433-472)
Farming, forestry, and fishing occupations (473-502)
Precision production, craft, and repair occupations (503-702)
Machine operators, assemblers, and inspectors (703-802)
Transportation and material moving occupations (803-863)
Handlers, equipment cleaners, helpers, and laborers (864-902)
Armed Forces
Male:
(Repeat OCCUPATION)
Female:
(Repeat OCCUPATION)
W1l-2  SEX(8) BY INDUSTRY(19) OF WORKERS ........ 0... c cece eee e eens senee 57

Universe: Workers 16 years and over

Both sexes:
All. industries
Agriculture, forestry, and fisheries (000-039)
Mining (040-059)
Construction (060-099)
Manufacturing, nondurable goods (100-229)
Manufacturing, durable goods (230-399)
Transportation (400-439)
Communications and other public utilities (440-499)
Wholesale trade (500-579)
Retail trade (580-699)
Finance, insurance, and real estate (700-720)
Business and repair services (721-760)
Personal services (761-799)
Entertainment and recreation services (800-811)
Health services (812-840)
Educational services (842-860)
Other professional and related services (841, 861-899)
Public administration (900-939)
Armed Forces (940-960)

Male:
(Repeat INDUSTRY)

Female:
(Repeat INDUSTRY)

1990 CTPP TABLE OUTLINES-Part 2 August 5, 1993

Page 2-2


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE

VEHICLE OCCUPANCIES AND MODE SPLIT

3. Determine Vehicle Occupancies and

Mode Splits by Urban Area
CTPP Tables(s) 3.1 Download Vehicles Used in
Trip to Work
CTPP Tables(s) 3.2 Download Vehicle Occupancies

3.3 Calculate Mode Split
(Non-Vehicle Trips)

1 6. Identify Relationships Between Vehicle 4 Mode Split
| im Models

Questions to be answered:

Step 3.1

Step 3.2

Step 3.3

1.

o

What is the universe of the CTPP Table used to determine vehicle
occupancies?

After completing Step 3.1, what is the average vehicle occupancy in
Capital City?

What travel modes in CTPP Table C-1 would you use to determine
non-vehicle trips?

How many non-vehicle trips were made in Green City?

How did you calculate mode split using Table C-1?

What is the mode split (percentage of non-vehicle trips) in Border
City?

31


CASE STUDY: ASSESSING COMMUTER BUS SERVICE

Percent Transit Trips

6.2

35%

30%

25%

20%

0%

-5%

The second graph is similar to the first, except instead of a single estimated
percent transit line, the confidence interval is used to evaluate routes.
Remember, we are 90% confident that those routes falling outside the
confidence interval are so for reasons other than sampling error. Therefore,
we are 90% sure that travel sheds 4, 7, and 11 fall outside the confidence
interval for reasons other than sampling error.

The Final Graph Should Look Like This:

TRAVEL TIME VS. MODE SHARE

14187163
© 90 00 °

= 10 ‘9
° Ad
4 °

3
1 1 1 1 n 1 1 L 4 1

1 Ww 1.2 1.3 1.4
Transit/Auto Travel Time Ratio
—— Upper Limit Lower Limit © Actual % Tronsit

63


1990 1980

Total number
Table Table Title of data cells
Motorcycle
Bicycle
Walked
Other means

A-55. N/A MEDIAN TRAVEL TIME IN MINUTES(1) BY MEANS OF TRANSPORTATION(10)
BY TIME LEAVING HOME TO GO TOWORK(7) ......-. 02sec eee eee ee teens 70
Universe: Workers 16 years and over who did not work at home
All workers who did not work at home:

All departure times

5:30 a.m. to 6:29 a.m.

6:30 a.m. to 7:29 a.m.

7:30 a.m. to 8:29 a.m.

8:30 a.m. to 9:29 a.m.

9:30 a.m. to 10:29 a.m.

10:30 a.m. to 5:29 a.m.
Drove alone:

(Repeat TIME LEAVING HOME TO GO TO WORK)
In 2-person carpool:

(Repeat TIME LEAVING HOME TO GO TO WORK)
In 3-person carpool:

(Repeat TIME LEAVING HOME TO GO TO WORK)
In 4-or-more-person carpoo!:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Bus or trolley bus:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Streetcar, trolley car, subway, or elevated:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Railroad:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Bicycle or walked:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Taxicab, ferryboat, motorcycle, or other means:

(Repeat TIME LEAVING HOME TO GO TO WORK)

A-56. N/A MEAN TRAVEL TIME IN MINUTES(1) BY MEANS OF TRANSPORTATION(10) BY
TIME LEAVING HOME TO GO TOWORK(7) .....-. cece eee e eee e errr eee nees 70
Universe: Workers 16 years and over who did not work at home
All workers who did not work at home:

All departure times

5:30 a.m, to 6:29 a.m.

6:30 a.m. to 7:29 a.m.

7:30 a.m. to 8:29 a.m.

8:30 a.m. to 9:29 a.m.

9:30 a.m. to 10:29 a.m.

10:30 a.m. to 5:29 a.m.
Drove alone:

(Repeat TIME LEAVING HOME TO GO TO WORK)
In 2-person carpool:

(Repeat TIME LEAVING HOME TO GO TO WORK)

1990 CTPP TABLE OUTLINES—Part A March 15, 1993 Page A-22


census questionnaire

© This is your official
¢ Please fill it out and

instruction guide or call

¢ Need help —
See the enclosed Faip
1-800-XXX-XXXX

‘the address

Of the U.S. Consus Oitice shows through the window

Mako sure that before you seal the envel

Census

990

i

il it back b:
Day, April 1,

mai

APPENDIX B

This booklet shows the content of
the two main questionnaires being
used in the 1990 U.S. Census. See

the explanatory notes on page 2.

2
&

If wrong apartment identification, please write the correct number

CENSUS ’90

OFFICIAL 1990
U.S. CENSUS FORM

‘Thank you for taking time to complete, -eturn this

census questionnaire. It’s importay your
community, and the Nation.

The law requires answer b' S privacy.

By law (Title 13, U.S.(CQvé e/required to answer the
census questions to ths knowledge. However,
the same lawgyaranteedtha¥ your census form remains

‘2 years-or until the year 2062~only
ees can see your form. No one

ent body, no police department, no
Welfare agency—is permitted to see this

J to get started-and get help.

Start by listing on the next page the names of all the
people who live in your home. Please answer all questions
with a black lead pencil. You'll find detailed instructions
for answering the census in the enclosed guide. If you
need additional help, call the toll-free telephone number to
the left, near your address.

Please answer and return your form promptly.

Complete your form and return it by April 1, 1990 in the
postage-paid envelope provided. Avoid the inconvenience
of having a census taker visit your home.

Again, thank you for answering the 1990 Census.
Remember: Return the completed form by April 1, 1990.

Para personas de habla hispana -
(For Spanish-speaking persons)
Si usted desea un cuestionario del censo
en espafiol, llame sin cargo alguno al
siguiente nimero: 1-800-XXXXXXX

fo sea 1-800-XXX-XXXX)}

U.S. Department of Commerce
AU OF THE CENSUS
BURE: OMB No. 0607-0628

ForM D-61 Approval Expires 07/31/91


1990 1980
Table_Table

Total number
Title of data cells

1-12. 1-2

1-13. N/A

1-14. N/A

65 to 74 years

75 years and over
Male:

(Repeat AGE)
Female:

(Repeat AGE)

SEX(3) BY AGE(12) FOR PERSONS IN GROUP QUARTERS ........-..00eeeeneee 36
Universe: Persons in group quarters
Both sexes:

Allages

Under 16 years

16 and 17 years

18 to 20 years

21 to 24 years

25 to 34 years

35 to 44 years

45 to 54 years

55 to 61 years

62 to 64 years

65 to 74 years

75 years and over
Male:

(Repeat AGE
Female:

(Repeat AGE)

HOUSEHOLD SIZE(5) BY NUMBER OF WORKERS IN HOUSEHOLD(6) ............ 30
Universe: Households
All households: .

Total, number of workers in household

No workers in household

1 worker in household

2 workers in household

3 workers in household

4 or more workers in household
1-person households:

(Repeat NUMBER OF WORKERS IN HOUSEHOLD)
2-person households:

(Repeat NUMBER OF WORKERS IN HOUSEHOLD)
3-person households:

(Repeat NUMBER OF WORKERS IN HOUSEHOLD)
4-or-more-person person households:

(Repeat NUMBER OF WORKERS IN HOUSEHOLD)

NUMBER OF WORKERS IN HOUSEHOLD(6) BY HOUSEHOLD INCOME IN 1989(26). . .156
Universe: Households
All households:

Total, household income

Less than $5,000

1990 CTPP TABLE OUTLINES—Part 1 August 5, 1993 Page 1-4


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE
PEAK-TO-DAILY SCATTERPLOT

HBW PEAK HOUR=TO—DAILY RATIO

0.415

0.405

04 -

0.395 -

0.385 F

0.38 F

PERCENT PEAK HOUR WORK TRIPS
°
we
oe
T

0.375 -

0.37

0.368 1 1 1 Ll 1 1 A 1 1
° 0.2 04 0.6 0.8 1
(iittions)
POPULATION

Exhibit CS-A-7

41


1990 1980
Table Table

Total number
Title of data cells

A-15, N/A

A-16. N/A

$5,000 to $9,999
$10,000 to $12,499
$12,500 to $14,999
$15,000 to $17,499
$17,500 to $19,999
$20,000 to $22,499
$22,500 to $24,999
$25,000 to $27,499
$27,500 to $29,999
$30,000 to $32,499
$32,500 to $34,999
$35,000 to $37,499
$37,500 to $39,999
$40,000 to $42,499
$42,500 to $44,999
$45,000 to $47,499
$47,500 to $49,999
$50,000 to $54,999
$55,000 to $59,999
$60,000 to $74,999
$75,000 to $99,999
$100,000 to $124,999
$125,000 to $149,999
$150,000 or more
No workers in household:
(Repeat HOUSEHOLD INCOME)
1 worker in household:
(Repeat HOUSEHOLD INCOME)
2 workers in household:
(Repeat HOUSEHOLD INCOME)
3 workers in household:
(Repeat HOUSEHOLD INCOME)
4 or more workers in household:
(Repeat HOUSEHOLD INCOME)

MEDIAN HOUSEHOLD INCOME IN 1989(1) BY NUMBER OF WORKERS IN

Te (© 05<) = (@) kB) (<) EY 6
Universe: Households

Total

No workers in household

1 worker in household

2 workers in household

3 workers in household

4 or more workers in household

MEAN HOUSEHOLD INCOME IN 1989(1) BY NUMBER OF WORKERS IN

[3 (0) 01>) 5 (@) hb) (<) IY 6
Universe: Households

Total

No workers in household

1990 CTPP TABLE OUTLINES—Part A March 15, 1993 Page A-5


TM@ Geographic Summary
Level*

TM@ Group Quarters*

@ Home-Based Work
Trip (HBW)

m@ Journey-to-Work
(JTW)*

@ Nationwide Personal
Transportation Study
(NPTS)

@ Place*

m@ Place of Residence*

@ Place of Work*

@ Statewide Element*

m Summary Tape
Files (STF)*

The geographic location at which CTPP data
are tabulated (e.g., state, county, place or traffic
analysis zones/census tracts).

Communal housing, such as dormitories, military bases,
prisons and nursing homes. Group quarters are distinct
from households in the CTPP.

A travel demand forecasting term that refers to
the two-way work trip (including journey-to-work and
journey-from-work).

The one-way trip from home to work, or a commuter
trip. Also called "worker flows." Collected from the
Census long form.

A periodic telephone survey of 20,000 households
also conducted in 1990. Includes data about all trips
and travel modes used in survey households.

Defined by the Census Bureau as having a population
of 2,500 or more. Also known as a Census-Defined
Place (CDP). Cities, towns and villages are all 'places.'

The location at which Census respondents said they
lived at the time the Census was taken (April 1990).
Household and economic characteristics are
summarized by residence location. Taken from all
Census respondents (short form).

The location at which Census respondents said they
worked. Worker characteristics summarized by work
place location. This information is taken from sampled
data (long form).

The CTPP is divided into two main groupings of the
data, based on the level at which the data are
geographically summarized. The Statewide Element
consists of data summaries for the entire state, county
totals for each county within the state and place totals
for each place within a county.

Data from 1990 Census Long and Short Forms
on 9-track computer tape. Summarized by block, block
group and zip code. Includes Place of Residence data.


Technical Report Documentation Page

“tin to. 1 AN 0 “eens

FHWA-PD-95-019
PB98-114465

4. Title and Subtitle 5. Report Date
CTPP HANDBOOK: February 1995

An Instructional Guide to the 1990 Census 6. Performing Organization Code
Transportation Planning Package

8. Performing Organization Report No.

7. Author's)
JHK & Associates, Orlando, FL
9. Performing Organization Name and Address 10. Work Unit No. (TRAIS)

JHK & Associates
315 E. Robinson Suite 290

Orlando, FL 32801-4328 DTFH61-91-co00010
13. Type of Report and Period Covered

TT. Contract or Grant No.

12. Sponsoring Agency Name and Address

Office of Environment and Planning Final Report
Federal Highway Administration

400 Seventh St. SW

Washington, DC 20590

15. Supplementary Notes

Contracting Officer’s Technical Representatives (COTRs):
Christopher R. Fleet and Monica I. Francois, HEP-22

14. Sponsoring Agency Code

16. Abstract

This handbook is designed for technical staff as an instructional guide to the
1990 Census Transportaion Planning Package (CTPP) and its potential uses. The
CTPP contains 1990 social and economic data by place of residence, place of work,
and journey to work, at various levels of detail and geography. The CTPP is the
largest national sample of commuter travel characterisitics, and is available
for each state and metropolitan area inthe U.S.

This handbook gives users an overview of the CTPP, and includes discussions of
basic Census defintions and CTPP organization into tables and parts. Users are
also oriented in: preparing to use the CTPP for analysis; the potential for
applying the CTPP to transportation planning; conducting reasonableness checks
of the data; using the CTPP in travel demand forecasting; and accessing CTPP
tables and technical assistance.

Self instructional case studies are also included which make use of simple
spreadsheets and provide hands-on experience with concepts and potential uses of
the CTPP data.

17, Key Words 18. Distribution Statement
CTPP, Census, commuting, planning, No restrictions. This document is
socio-economic data, travel behavior, available to the public through
travel demand, travel forecasting the US DOT Warehouse.

19. Security Classif. (of this report) 20. Security Classif, (of this page) 21. No. of Pages | 22. Price
Unclassified Unclassified 174 (w/App

Form DOT F 1700.7 (8-72) Reproduction of completed page authorized


1990

1980

Table Table

Title

Total number
of data cells

2-7.

2-8,

H-5

N/A

1990 CTPP TABLE OUTLINES-Part 2

Male:

(Repeat MEANS OF TRANSPORTATION TO WORK)
Female:

(Repeat MEANS OF TRANSPORTATION TO WORK)

MEANS OF TRANSPORTATION TO WORK(20) .........0.000 08

Universe: Workers 16 years and over
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-person carpool

In 5-person carpool

In 6-person carpool

In 7-to-9-person carpool
In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad

Ferryboat

Taxicab

Motorcycle

Bicycle

Walked

Other means

Worked at home

TIME OF ARRIVAL AT WORK OF WORKERS(89) .........-+-65
Universe: Workers 16 years and over who did not work at home

Total

5:00 a.m. to 5:14 a.m.
5:15 a.m. to 5:29 a.m.
5:30 a.m. to 5:44 a.m.
5:45 a.m. to 5:59 a.m.
6:00 a.m. to 6:14 a.m.
6:15 a.m. to 6:29 a.m.
6:30 a.m. to 6:44 a.m.
6:45 a.m. to 6:59 a.m.
7:00 a.m. to 7:14 a.m.
7:15 a.m. to 7:29 a.m.
7:30 a.m, to 7:44 a.m.
7:45 a.m. to 7:59 a.m.
8:00 a.m. to 8:14 a.m.

August 5, 1993

Page 2-4


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE

TRAVEL TIME SCATTERPLOT

TRAVEL TIME (MINUTES)

HBW TRAVEL TIMES

0.2 0.4 0.6 0.8 1
(Millions)
POPULATION

DODAILY + PEAK PERIOD

Exhibit CS-A-4

38


1990 CTPP TABLE OUTLINES

Urban Element
Part 3-Tabulations of Area of Residence by Area of Work

Note: A colon(:) after an entry below indicates that the entry is a heading, not a data cell. The heading is a
modifier or descriptor of the categories indented beneath it, but no data are associated with the heading line.

1990 1980 Total number
Table Table Title of data cells

3-1. IV-1 | TIMELEAVING HOME TO GO TO WORK-TOTAL AND PEAK PERIOD(2) BY MEANS OF
TRANSPORTATION TO WORK(19) ....6 00 cece e cece n erence ee teen eenenenes 38
Universe: Workers 16 years and over who did not work at home
Total, time leaving home to go to work:

Workers who did not work at home
Drove alone
In 2-person carpool
In 3-person carpool
In 4-person carpool
In 5-person carpool
In 6-person carpool
In 7-to-9-person carpool
In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad
Ferryboat
Taxicab
Motorcycle
Bicycle
Walked
Other means
Peak period (6:30 a.m. to 8:29 a.m.):
(Repeat MEANS OF TRANSPORTATION)

3-2. IV-3 | AGGREGATE NUMBER OF VEHICLES USED IN TRAVEL TO WORK(1) BY TIME
LEAVING HOME TO GO TO WORK-TOTAL AND PEAK PERIOD(2) .............0065 2
Universe:Workers 16 years and over using a car, truck, or van
Total, time leaving home to go to work
Peak period (6:30 a.m. to 8:29 a.m.)

3-3, IV-3 | WORKERS PER VEHICLE(1) BY TIME LEAVING HOME TO GO TO WORK-TOTAL
AND PEAK PERIOD(2) ...... 00.0 cece eect e cece teen n nnn teen ee enennes 2
Universe: Workers 16 years and over using a car, truck, or van
Total, time leaving home to go to work
Peak period (6:30 a.m. to 8:29 a.m.)

1990 CTPP TABLE OUTLINES-Part 3 August 5, 1993 Page 3-1


CHAPTER 3

CHECKING FOR REASONABLENESS

Introduction

When preparing to use the CTPP tabulations, be aware that you will need to make
several checks of the data to assure its reasonableness before using it in an analysis. As
with many data collection efforts, there are both sampling and non-sampling errors that
could create problems if not detected early and recognized or corrected. This chapter
begins with a discussion of how the CTPP should be reviewed to minimize such errors,
and identifies some considerations that must be made before using the data for certain
applications. The second part of the chapter identifies ways to access CTPP data and
where to get help with Census questions and problems.

Types of Errors

Non-Sampling errors are due to mistakes made during data collection or
processing at the Census Bureau. These may also be due to a general misinterpretation
of questions by respondents. Probably the best-known non-sampling error associated with
the 1990 Census was the reported under-counting of the population. The Census Bureau
recognized that there would be certain groups that, for various reasons, would not respond
to the Census questionnaire. As much as possible, the Census Bureau attempted to make
contact with these groups, but problems were still evident. The Census Bureau also made
a number of checks of the data once collected to assure the accuracy of the collection and
processing effort.

Overall it is important to recognize that because of the enormity of the Census data,
it is unlikely that all mistakes were caught and corrected before the data were summarized
and tabulated. Furthermore, there may have been problems with how some of the
questions were interpreted by respondents. An example would be the travel time
estimates that were reported. These may be in error because of the differences between
perceptions and reality, and could have been in error because respondents tend to report
in-vehicle travel times instead of door-to-door travel times. The Census Bureau
extensively pretests the survey forms prior to each Census and makes an attempt to
eliminate the potential for misinterpretation. Nevertheless, for some of the more lengthy
questions on the long form, misinterpretation could have occurred.

There is also the potential for sampling errors associated with long form
responses. The long form was distributed to one in six households, on average, around
the country. Because the long form was only completed by selected households, there is
a probability that the long form sample does not reflect the population at large. This
probability is known as sampling error. In Census publications, the standard error
associated with each of the long form response tabulations is presented so that data users
can estimate the confidence interval for long form estimates.

As an example, the total labor estimate for a place is reported to be 9,948. This
estimate is based on occupation and employment questions asked on the Census long

69




HI

PB98-114465 Information is our business.

CTPP HANDBOOK: AN INSTRUCTIONAL GUIDE
TO THE 1990 CENSUS TRANSPORTATION
PLANNING PACKAGE

FEB 95

U.S. DEPARTMENT OF COMMERCE
National Technical Information Service



1990
Table

1980
Table

Title

Total number
of data cells

B-3.

B-4.

H-2

H1-3

1990 CTPP TABLE OUTLINES—Part B

Precision production, craft, and repair occupations (503-702)
Machine operators, assemblers, and inspectors (703-802)
Transportation and material moving occupations (803-863)

Handlers, equipment cleaners, helpers, and laborers (864-902)

Armed Forces
Male:

(Repeat OCCUPATION)
Female:

(Repeat OCCUPATION)

SEX(3) BY INDUSTRY(19) OF WORKERS ........--- see cere eee

Universe: Workers 16 years and over

Both sexes:
All. industries
Agriculture, forestry, and fisheries (000-039)
Mining (040-059)
Construction (060-099)
Manufacturing, nondurable goods (100-229)
Manufacturing, durable goods (230-399)
Transportation (400-439)
Communications and other public utilities (440-499)
Wholesale trade (500-579)
Retail trade (580-699)
Finance, insurance, and real estate (700-720)
Business and repair services (721-760)
Personal services (761-799)
Entertainment and recreation services (800-811)
Health services (812-840)
Educational services (842-860)
Other professional and related services (841, 861-899)
Public administration (900-939)
Armed Forces (940-960)

Male:
(Repeat INDUSTRY)

Female:
(Repeat INDUSTRY)

SEX(3) BY CLASS OF WORKER(8) OF WORKERS .......--2 00s e eee

Universe: Workers 16 years and over

Both sexes:
Total, class of worker
Private for profit wage and salary workers
Private not-for-profit wage and salary workers
Local government workers
State government workers
Federal government workers
Self-employed workers
Unpaid family workers

Male:

(Repeat CLASS OF WORKER)

February 1, 1993

Page B-2




1990 1980
Table Table

Total number
Title of data cells

1-24. 1-25

1-25.1-6

4 vehicles

5 vehicles

6 vehicles

7 or more vehicles
1 unit, detached:

(Repeat VEHICLES AVAILABLE)
1 unit, attached:

(Repeat VEHICLES AVAILABLE)
2 to 4 units:

(Repeat VEHICLES AVAILABLE)
5 or more units:

(Repeat VEHICLES AVAILABLE)
Mobile home or trailer:

(Repeat VEHICLES AVAILABLE)
Other:

(Repeat VEHICLES AVAILABLE)

HISPANIC ORIGIN(3) BY RACE(4) BY MEANS OF TRANSPORTATION TO WORK(11). . 132
Universe: Workers 16 years and over
Total, Hispanic origin:
All races:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
White:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Black:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Other:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Not of Hispanic origin:
(Repeat RACE By MEANS OF TRANSPORTATION TO WORK)
Hispanic origin:
(Repeat RACE By MEANS OF TRANSPORTATION TO WORK)

SEX(3) BY OCCUPATION(15) FOR WORKERS ..... see eee cece tence e ee eeeenes 45
Universe: Workers 16 years and over
Both sexes:

All occupations

Executive, administrative, and managerial occupations (000-042)

Professional specialty occupations (043-202)

Technicians and related support occupations (203-242)

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993 Page 1-9


1990 1980
Table Table

Total number
Title of data cells

2-26. N/A

2-27. N/A

1990 CTPP TABLE OUTLINES-Part 2 August 5, 1993 Page 2-13

MEAN TRAVEL TIME IN MINUTES(1) BY MEANS OF TRANSPORTATION(10) BY

TIME OF ARRIVAL AT WORK(7) 00... 0. 0c cece eee eee eee eee nnn nee

Universe: Workers 16 years and over who did not work at home
Workers who did not work at home:

All arrival times

5:30 a.m. to 6:29 a.m.

6:30 a.m. to 7:29 a.m.

7:30 a.m. to 8:29 a.m.

8:30 a.m. to 9:29 a.m.

9:30 a.m. to 10:29 a.m.

10:30 a.m. to 5:29 a.m.
Drove alone:

(Repeat TIME OF ARRIVAL AT WORK)
In 2-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
In 3-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
In 4-or-more-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
Bus or trolley bus:
(Repeat TIME OF ARRIVAL AT WORK)
Streetcar, trolley car, subway, or elevated:
(Repeat TIME OF ARRIVAL AT WORK)
Railroad:

(Repeat TIME OF ARRIVAL AT WORK)
Bicycle or walked:

(Repeat TIME OF ARRIVAL AT WORK)
Taxicab, ferryboat, motorcycle, or other means:

(Repeat TIME OF ARRIVAL AT WORK)

STANDARD DEVIATION OF TRAVEL TIME IN MINUTES(1) BY MEANS OF

TRANSPORTATION(10) BY TIME OF ARRIVAL AT WORK(7) .........0000 0008

Universe: Workers 16 years and over who did not work at home
Workers who did not work at home:

All arrival times

5:30 a.m. to 6:29 a.m.

6:30 a.m. to 7:29 a.m.

7:30 a.m, to 8:29 a.m.

8:30 a.m. to 9:29 a.m.

9:30 a.m. to 10:29 a.m.

10:30 a.m, to 5:29 a.m.
Drove alone:

(Repeat TIME OF ARRIVAL AT WORK)
In 2-person carpool:


Notice

This document is disseminated under the sponsorship of the Department of Transportation
in the interest of information exchange. The United States Government assumes no liability
for its content or use thereof. This report does not constitute a standard, specification or
regulation.

The United States Government does not endorse products or manufacturers. Trade or
manufacturers’ names appear herein only because they are considered essential to the objective
of this document.


1990
Table

1980
Table

Total number
Title of data cells.

B-5.

B-6.

B-7.

N/A

IH-8

WN-5

Female:
(Repeat CLASS OF WORKER)

SEX(3) BY NUMBER OF HOURS WORKED LAST WEEK(6) OF WORKERS .......... 18
Universe: Workers 16 years and over
Both sexes:

Total, number of hours worked last week

Less than 15 hours

15 to 20 hours

21 to 34 hours

35 to 40 hours

Over 40 hours
Male:

(Repeat NUMBER OF HOURS WORKED LAST WEEK)
Female:

(Repeat NUMBER OF HOURS WORKED LAST WEEK)

SEX(8) BY MEANS OF TRANSPORTATION TO WORK(11) .....- 6s ee eee eee eee 33
Universe: Workers 16 years and over
Both sexes:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
Male:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Female:
(Repeat MEANS OF TRANSPORTATION TO WORK)

MEANS OF TRANSPORTATION TO WORK(20) 0.0.0.0 sec e eee eee eee nee en eens 20
Universe: Workers 16 years and over
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-person carpool

In 5-person carpool

In 6-person carpool

In 7-to-9-person carpool

In 10-or-more-person carpool

Bus or trolley bus

Streetcar or trolley car

Subway or elevated

1990 CTPP TABLE OUTLINES-Part B February 1, 1993 Page B-3


The following steps are used:

Remember when working in the spreadsheets, the following commands may be helpful:

Step 1:

1.4

Step 2:
21

2.2

2.3

Exit Macros: Type “Q” or “Quit”
Rejoin Macros: Type ALT and C simultaneously

Identify populations in the State of States’ urban areas

Identify the total urban area population here (using CTPP Table A-1) for
each city in the State of States. (This has been done and is stored in the
case study worksheets.)

Determine work trips rates by urban areas

Download CTPP Table A-4 to determine total households for each urban
area. Then, download CTPP Table C-1 to determine total work trips by
urban area. (This has been done and results are stored in file HH-
JTW.PRN)

Convert JTW trips to HBW trips. Enter 1.81 (the conversion factor
developed based on local data to convert CTPP Journey-to-Work data-see
Note on pg. 23). The program will automatically multiply the factor by the
JTW trips to estimate daily HBW trips.

Divide HBW trips by households. The program will automatically divide total

HBW trips by households for each urban area to determine average trip
rates.

26


1990 1980
Table Table __Title

Total number
of data cells

A-19. N/A NUMBER OF PERSONS 16 YEARS AND OVER IN HOUSEHOLD(5) BY VEHICLES

AVAILABLE(9)

Universe: Households with at least one person 16 years and over

All households:

Total, vehicles available

No vehicles

1 vehicle

2 vehicles
3 vehicles
4 vehicles
5 vehicles
6 vehicles
7 or more vehicles
1 person 16 and over:

(Repeat VEHICLES AVAILABLE)

2 persons 16 and over:

(Repeat VEHICLES AVAILABLE)

8 persons 16 and over:

(Repeat VEHICLES AVAILABLE)
4 or more persons 16 and over:
(Repeat VEHICLES AVAILABLE)

A-20. N/A VEHICLES AVAILABLE(9) BY HOUSEHOLD INCOME IN 1989(26)

Universe: Households

Total, vehicles available:
All incomes
Less than $5,000
$5,000 to $9,999

$10,000
$12,500
$15,000
$17,500
$20,000
$22,500
$25,000
$27,500
$30,000
$32,500
$35,000
$37,500
$40,000
$42,500
$45,000
$47,500
$50,000
$55,000
$60,000
$75,000

$100,000 to $124,999

to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to

$12,499
$14,999
$17,499
$19,999
$22,499
$24,999
$27,499
$29,999
$32,499
$34,999
$37,499
$39,999
$42,499
$44,999
$47,499
$49,999
$54,999
$59,999
$74,999
$99,999

1990 CTPP TABLE OUTLINES—Part A

March 15, 1993

Page A-7


1990 1980
Table Table _ Title

Total number
of data cells

62 to 64 years

65 to 74 years

75 years and over
Male:

(Repeat AGE)
Female:

(Repeat AGE)

A-7. N/A SEX(3) BY EMPLOYMENT STATUS(6)
Universe: Persons 16 years and over
Both sexes:

Total, employment status
In labor force:
In Armed Forces
Civilian:
Employed:
At work
Not at work
Unemployed
Not in labor force
Male:
(Repeat EMPLOYMENT STATUS)
Female:
(Repeat EMPLOYMENT STATUS)

A-8. 1-5 | SCHOOL ENROLLMENT(6) BY AGE(8)
Universe: Persons 3 years and over
Total, school enrollment:

Persons 3 years and over
3 and 4 years
5 years
6 to 11 years
12 to 17 years
18 to 64 years
65 to 74 years
75 years and over
Enrolled:
In nursery schoo! or kindergarten:
(Repeat AGE)
In grade 1 to 9:
(Repeat AGE)
In grade 10 to 12:
(Repeat AGE)
In college:
(Repeat AGE)
Not enrolled:
(Repeat AGE)

1990 CTPP TABLE OUTLINES—Part A March 15, 1993

Page A-2




CASE STUDY: ASSESSING COMMUTER BUS SERVICE

2.2 Develop travel shed/TAZ equivalency list (Exhibit CS-B-4).

Travelshed/TAZ
Equivalencies

TAZ/CT Travelshed
u
u
n
uW
Nu

Or Owe wwe

NI

Exhibit CS-B-4

50


eenvntoewo Ml

Mo osnensoneo

0000000000
000000000

Aa. I nem ep eres,

A Pn ean nko send yen na og,

{eaten nopg opm npr og
“Arppan De obese ore aig “0

Pome np oa “mary wren
. ce ern topes
> and np ny og 4 9D BHO

smpouyingty © _vioa tN ©
Pmeee OMAP O
vou WALTER

sneer  apmrPEREIOHL
Hvoung p SAY TRUE

smerny Owes O

young IAL THM A

vou ge IATA

Leg toed BADEN KIO
youn om mop BIOL

arnoswaae
preprssaied eng MOH

“I nted ve oy woneend
pate wonders 2p

ante me ed

THOST

FNOSHRT

——————— £29¥d NO SNOLLSIND ONISNOH HaASNV OSTV3SVaId

<<  TS0Va NO SNOLISIND ONISNOH HAMSNV OST ASVIId

SNOSU3d TY JO GANS SNOILS3ND-

doo eqeilene ys0q
wo peonpoidey



1990 1980
Table Table

Title

Total number
of data cells

A-34, 1-23

A-35. 1-23

1990 CTPP TABLE OUTLINES—Part A

$5,000 to $9,999:

(Repeat MEANS OF TRANSPORTATION)
$10,000 to $14,999:

(Repeat MEANS OF TRANSPORTATION)
$15,000 to $19,999:

(Repeat MEANS OF TRANSPORTATION)
$20,000 to $24,999:

(Repeat MEANS OF TRANSPORTATION)
$25,000 to $29,999:

(Repeat MEANS OF TRANSPORTATION)
$30,000 to $34,999:

(Repeat MEANS OF TRANSPORTATION)
$35,000 to $49,999:

(Repeat MEANS OF TRANSPORTATION)
$50,000 to $74,999:

(Repeat MEANS OF TRANSPORTATION)
$75,000 or more:

(Repeat MEANS OF TRANSPORTATION)

No earnings:

MEDIAN EARNINGS OF WORKERS(1) BY MEANS OF TRANSPORTATION(11)
Universe: Workers 16 years and over with earnings

(Repeat MEANS OF TRANSPORTATION)

Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated
Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

Worked at home

MEAN EARNINGS OF WORKERS(1) BY MEANS OF TRANSPORTATION(11)
Universe: Workers 16 years and over with earnings

Total

Drove alone

in 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Rail

lroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

Worked at home

March 15, 1993

Page A-14


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de

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be checked carefully. For more detailed information about weighting procedures, refer to
Appendix C of the STF-3A documentation provided by the Census Bureau.

Reasonableness Checks

Despite the probability of non-sampling errors associated with the Census data, no
other data sources exceed the accuracy of the 100 percent short form responses by Place
of Residence. In fact, Census Place of Residence information is typically used to check
other data sources. The Place of Residence tabulations of long form responses are also
very accurate because of the size of the sample. Seldom are local surveys conducted with
a sample size larger than the long form sampling rate. As sample sizes increase, the
magnitude of the sampling error decreases exponentially. In other words, the probability
of selecting a sample that represents the entire population increases as the size of the
sample increases. Therefore, it is unlikely that there will be substantial sampling errors
associated with long form responses.

Where errors do occur in the CTPP, they will most likely be found in Place of Work
and JTW tabulations. Errors here will usually be due to problems with geocoding
addresses provided on the long form to Census geography. Such errors could be caused
by respondents not providing accurate addresses, or by the inability of Census geocoders
to accurately locate addresses. Again, if there are any geocoding errors evident, they will
be compounded by the weighting used in adjusting long form responses to represent the
total population.

When checking Census data, it is best to begin by conducting a series of internal
checks. These checks could include comparing Place of Work totals with Census totals
from other Census products. For example, Total Persons tabulated in the CTPP can be
compared against total persons tabulated in one of the Census Bureau's other products,
such as the STF-3A tables. If the totals in the CTPP and STF-3A tables are equal, then
further checks of characteristics can also be made. For example, household sizes
reported in the CTPP can be compared with those reported in the STF-3A. These internal
checks should occur at the MSA level first, and then checks should be made at smaller
geographic levels. If the CTPP tabulations do not equal those results found in the STF-3A
at any level, you will then need to step back and try to determine why such differences
exist.

Because the CTPP is the only Census product that provides Place of Work and
JTW tabulations, you will not be able to make the same types of internal checks with these
tabulations. To the extent possible, checks with other employment data sources will need
to be made of work place tabulations. Moreover, travel demand data sources, such as
travel diaries, etc., should be used to check JTW information.

Use of CTPP Data in Travel Demand Forecasting

Many users of the CTPP will be interested in its travel demand forecasting
applications. In addition to using the socio-economic data (such as population by TAZ,
dwelling units, household size, employment data and vehicles available) as inputs into the

71


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE
Step 4 Determine Peak-to-Daily Ratios (% Peak)

4.1. Download CTPP Table C-1. (This has already been done and stored in file
DAILY-PK.PRN)

4.2 Calculate peak period-to-daily percentage. Peak period JTW trips are
divided into daily HBW trips using the following formula in cell F8:

+E8/D8
he Screen Should Look Like This:

Al: (W7]) ‘ESTIMATE PEAK MENU
Step 4.1 Step 4.2 Review Step 5 Quit CS Menu

Go to Step 4

A 8 c D) E F G

1 ESTIMATE PEAK HOUR PERCENTAGES

2

3 AM Peak .

4 Daily Period Peak Period
5 HBW JTW to Daily
6 City Population Trips io
7

8 1 50,000 51,522 18,909 36.7%
9 2 65,000 71,499 27,313 38.2%
10 3 150,000 177,273 66,300 37.4%
" 4 225,000 300,000 114,900 38.3%
12 5 275,000 352,499 136,417 38.7%
13 6 550,000 675,715 268,935 39.8%
4 7 675,000 843,750 329,906 39.1%
5 8 850,000 991,666 398,650 40.2%
16 9 950,000 1,128,825 463,947 AAR
7

18

19

20

cHO

32


FORPERSON1ONPAGE2 [QUESTIONS ASKED OF A SAMPLE OF HOUSEHOLDS] i

Page7

‘23a, How did this person usually get to work LAST
WEEK? If this person usualy used more than one
‘mathod of transportation during the trip, fil the circle

Of the one used for most of the distance,
© Car, truck, orvan — O Motoreycle
© Busortoleybut © Bieycle

© Streetcar or trolley car © Walked
© Subway orelevated © Worked at home =

28. Industry or Employer
18, For whom did this person work?
H now on active duty in the Armed

Descrbe the activity 2

hospital
mal order house, auto engine

‘b. What kind of business or industry was this?-

32. INCOME IN 1989 —
Fillthe “Yes” circle below foreach income soures
recelved during 1989 Otherwise, #8 the "No" cele.
"Yes," exter the lta amount received during 1989, I
For income receved jointly, see instruction guide.
exact amounts not known, please give best extimaie,
Wnet income was a loss, write “Loss” above
‘the dollar amount.

a. Wages, salary, commissions, bonuses, or tips
from all Jobs — Repoct amount belore deductions

retad bakery)

¢. Is this mainly — Fill ONE circle
© Manufscturing ©. Other (agriculture,
© Wholesale trade .
© Retail rade

© Railroad ‘Skip to 28

© Ferryboat r | © Other method

© Taxicab

Hf“ car, truck, or van” is marked in 23a, 90 to 23b, Otherwise, |
hip 0 248.

b. How many people, including this person,
usually rode to work in the ear, truck, or van
LAST WEEK? a
© Drove alone © Speople
© 2people © 6 people
© B3people © 7109 people
© 4 people © 100rmore people

‘24a. What time did this person usually leave home
to go to work LAST WEEK?
meen oo am.
1 © p.m.

a

>. How many minutes did it usually take this person
to get from home to work LAST WEEK?
caer)
i es
i _] Minutes — Skip to 28

25. Was this person TEMPORARILY absent or on
layofl from a job or business LAST WEEK?

© Yes, on layott

© Yes, on vacation, temporary ilivess,
labor dispute, etc,

© No

26a. Has this person been looking for work during the
last 4 weeks?

© Yes

fo No — Skip to 27

‘>. Could this person have taken a job LAST WEEK
Hone had been offered?

© No, aheadyhasaod pay
© No, temporary il

‘30. Was this person — Fl ONE crcle

(© Employee of a PRIVATE FOR PROFIT company or
‘business or of an individual, for wages, salary, of

cornmissions

(© Employee of a PRIVATE NOT-FOR-PROFIT,
‘tex-exempt, ot charitable organization

© Local GOVERNMENT employee (ety, county, et.)

© State GOVERNMENT employee

(©. Federal GOVERNMENT

prof
© Working WITHOUT PAY in famty business or farm

© No, other reasons (in school, ete.)
© Yes, could have taken a Job

27, When did this person last work, even for a few
days?
© 1990

1980 to 1984

© 1989 Go 0 1979 orearter red
© 1988 28 © Never worked
© 1985 to 1987 /

28-30. CURRENT OR MOST RECENT JOB
ACTIVITY. Describe clearly this person's chief
Job activity or business last week. If this person had
‘more than one job, describe the one at which this,
person worked the most hours. H this person had.
no job or business last week, give information for
‘his/her last ob or business since 1985,

Sia, Last year (1989), did this person work, even for =
few days, at a paid job or in a business or farm?
© Yes .

© No— Skip 10.32

b. How many weeks did this person work in 1989?
(Count paid vacation, pabd sick
leave, and miliary service,

4
| Weeks

7 Interest, dividends, net rental income or royalty]
income, or Income from estates and trusts —
Report even small amounts credited to an account.

9
8
2
6
s
&
3
@
e

Onmoruce

‘such as money from an inhertance or the sale

of ahome.
© Ye——
© No

¢, During the weeks WORKED in 1989, how many
hours did this person usually work each week?

cory

‘33. What was this person's total income in 1989?
[uy Aid entries in questions 32a through 32h; subtract
any losses. Hf total amount was a loss, write “Loss”

Reproduced from
best available copy.



CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE

Other Questions:

1. How would you use the relationships found from the data for travel demand
forecasting?
2. Could you extrapolate these relationships to urban areas that are larger or

smaller than those in the State of States?


1990 1980
Table Table

Title

Total number
of data cells

B-25. N/A

B-26. N/A

1990 CTPP TABLE OUTLINES-Part B

MEDIAN TRAVEL TIME(1) IN MINUTES BY MEANS OF TRANSPORTATION(10)

BY TIME OF ARRIVAL AT WORK(7) ......0-0 eee eee
Universe: Workers 16 years and over who did not work at home

Workers who did not work at home:

All arrival times

5:30 a.m. to 6:29 a.m.

6:30 a.m. to 7:29 a.m.

7:30 a.m. to 8:29 a.m.

8:30 a.m. to 9:29 a.m.

9:30 a.m. to 10:29 a.m.

10:30 a.m. to 5:29 a.m.
Drove alone:

(Repeat TIME OF ARRIVAL AT WORK)
In 2-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
In 3-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
In 4-or-more-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
Bus or trolley bus:

(Repeat TIME OF ARRIVAL AT WORK)
Streetcar, trolley car, subway, or elevated:

(Repeat TIME OF ARRIVAL AT WORK)
Railroad:

(Repeat TIME OF ARRIVAL AT WORK)
Bicycle or walked:

(Repeat TIME OF ARRIVAL AT WORK)

Taxicab, ferryboat, motorcycle, or other means:

(Repeat TIME OF ARRIVAL AT WORK)

MEAN TRAVEL TIME IN MINUTES(1) BY MEANS OF TRANSPORTATION(10) BY

“TIME OF ARRIVAL AT WORK(7) .......000e eee ee cues
Universe: Workers 16 years and over who did not work at home

Workers who did not work at home:

All arrival times

5:30 a.m. to 6:29 a.m.

6:30 a.m. to 7:29 a.m.

7:30 a.m. to 8:29 a.m.

8:30 a.m. to 9:29 a.m.

9:30 a.m. to 10:29 a.m.

10:30 a.m. to 5:29 a.m.
Drove alone:

(Repeat TIME OF ARRIVAL AT WORK)
In 2-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
In 3-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
In 4-or-more-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)

February 1, 1993

Page B-11


CASE STUDY: ASSESSING COMMUTER BUS SERVICE

This step has already been done. Travel sheds are shown below:

Travelshed/TAZ
Equivalency

2. Identify Route Travelsheds

Bus Route Map

Exhibit CS-B-3

1. How would you identify travel sheds using route maps?

49


1990 1980
Table Table

. Total number
Title of data cells

1-38. N/A

1-39. N/A

1-40. N/A

1-41. 1-21

(Repeat TRAVEL TIME TO WORK)
In 4-or-more-person carpool:

(Repeat TRAVEL TIME TO WORK)
Bus or trolley bus:

(Repeat TRAVEL TIME TO WORK)
Streetcar, trolley car, subway, or elevated:

(Repeat TRAVEL TIME TO WORK)
Railroad:

(Repeat TRAVEL TIME TO WORK)
Bicycle or walked:

(Repeat TRAVEL TIME TO WORK)
Taxicab, ferryboat, motorcycle, or other means:

(Repeat TRAVEL TIME TO WORK)

MEDIAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(10) .... 0c cece cece ence teen eee n eee e nee e eee e ne te tens 10
Universe: Workers 16 years and over who did not work at home
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

MEAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(10) ... 00. c cece cece eee eee e nent eee e nen n nee nn nees 10
Universe: Workers 16 years and over who did not work at home
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

AGGREGATE NUMBER OF VEHICLES USED IN TRAVEL TOWORK(1) ........--0005 1
Universe:Workers 16 years and over using a car, truck, or van
Total

WORKERS PER VEHICLE(1) 0... 0. ec ee cece eee e erect e cence eneee cer eetes 1
Universe: Workers 16 years and over using a car, truck, or van
Total

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993 Page 1-16


CASE STUDY: ASSESSING COMMUTER BUS SERVICE
(USING THE CTPP DIRECTLY FOR TRANSPORTATION PLANNING
ANALYSIS)

INTRODUCTION

The city council is concerned about the commuter bus service currently provided
to workers in the CBD. They would like to know which routes are effective, those that are
not and why the ineffective routes are operating poorly. To provide the information
needed, use CTPP tables and the steps presented on the following pages.

Bus ridership among choice riders (those who have access to a personal vehicle) is
typically influenced by the following factors:

e comparative bus vs. auto travel times (bus times include time spent waiting
for the bus, ride time and, if necessary, time to transfer);

e comparative travel costs (auto operating costs vs. bus fare);
° parking costs; and
e other factors (such as the walk distance to or from bus stops).

Commuter bus fares and downtown parking costs are the same for all commuter routes.
Therefore, either travel times or some other factors affect ridership among routes.

Use the CTPP tables to identify those routes with comparatively poor travel times
versus auto travel. This information will be used to determine route changes that can be
made to improve travel times for identified routes. In addition, travel time/mode share
comparisons will indicate whether other factors are influencing mode share. If so, more
detailed analysis will be conducted for the identified routes in an attempt to find out what
those other factors are.

This case study is CS-4 on the Lotus diskette provided. To begin, select Case
Study 4, Situation 2, from the CS-Menu spreadsheet or retrieve file "CS-4-2.WK1" into a
blank Lotus 1-2-3 spreadsheet. Use the menus provided in the spreadsheet to step
through the case study and answer the case study questions presented on the following
pages.

45


a universe in the CTPP (workers age 16 and over), the travel mode being measured is one
of the cross tabulations in the CTPP JTW tables, and existing bus service (if available)
could have been a mode taken in 1990. It would not be possible, however, to use the
CTPP to directly analyze travel times to a proposed suburban employment center
development on a proposed light rail line.

Information obtained from the long form and contained in the CTPP can be used to
update model parameters, such as automobile occupancies and mode split relationships.
Underlying trends (trip lengths, household size, and vehicles available) can also be
evaluated. Additionally, CTPP data taken from the short form questionnaire includes total
counts of the commuter market and the socio-economic information surrounding these
counts; as information for 100% of the population, this data can be very valuable in doing
accurate, direct analysis.

Applications for which the CTPP JTW data can be used directly for analysis include
such situations as: assessing the impacts of a plant relocation; assessing the potential of
car- and van-pool programs; evaluating the effectiveness of commuter bus service; and
analyzing tax incentives for commuters to shift modes. Other options are certainly possible
as long as the universe is contained in the CTPP and the existing or near term condition
is being measured.

Accessing the CTPP

The Federal Bureau of Transportation Statistics (BTS) at the U.S. Department of
Transportation has released Statewide Parts A, B and C of the CTPP on CD-ROM. An
ASCII data dump of the Urban Element Parts 1, 2 and 3 has also been released to state
DOTs on CD-ROM. The CD-ROM itself does not include any software to process or
analyze the data. However, you can use any number of programming languages like
Basic, C, Fortran or SAS to process the data. CD-ROM versions of the Urban Element
Parts 1, 2 and 3, will be released in the future.

Software

The CTPP, even for the smallest of states and urban areas, is a formidable
collection of tables that will push most personal computers to their limits. Therefore,
special considerations have been made for users who do not have access to a mainframe
computer and wish to manipulate CTPP information with personal computers. Because
of the number of cross-tabulations associated with each table and the size of the
geographic areas of analysis, many tables have well over 100 data cells. Moreover, most
spreadsheet, database and statistical software are limited to reading only 250 fields of
data, and are not able to import and read the larger CTPP tables. To help users mitigate
these issues and make effective use of the CTPP, special software has been created.

BTS is distributing software that will make extracting and formatting the CTPP tables
considerably easier. The software, called TransVU-CTPP, has been sent to state
Departments of Transportation as part of the Statewide CD-ROM version of the CTPP.
TransVU is in the public domain. It is browse and extraction software for use with
Microsoft Windows, and is designed to display geographic data and export the data in

74


1990 1980 Total number
Table Table Title of data cells

1 worker in household
2 workers in household
3 workers in household
4 or more workers in household

A-17. N/A HOUSEHOLD SIZE(5) BY VEHICLES AVAILABLE(9) .........0 eee e renee eee 45

Universe: Households
All households:

Total, vehicles available

No vehicles

1 vehicle

2 vehicles

3 vehicles

4 vehicles

5 vehicles

6 vehicles

7 or more vehicles
1 person in household:

(Repeat VEHICLES AVAILABLE)
2 persons in household:

(Repeat VEHICLES AVAILABLE)
3 persons in household:

(Repeat VEHICLES AVAILABLE)
4 or more persons in household:

(Repeat VEHICLES AVAILABLE)

A-18. N/A NUMBER OF WORKERS IN HOUSEHOLD(6) BY VEHICLES AVAILABLE(9) .......-. 54

Universe: Households
All households:

Total, vehicles available

No vehicles

1 vehicle

2 vehicles

3 vehicles

4 vehicles

5 vehicles

6 vehicles

7 or more vehicles
No workers:

(Repeat VEHICLES AVAILABLE)
1. worker:

(Repeat VEHICLES AVAILABLE)
2 workers:

(Repeat VEHICLES AVAILABLE)
3 workers:

(Repeat VEHICLES AVAILABLE)
4 or more workers:

(Repeat VEHICLES AVAILABLE)

1990 CTPP TABLE OUTLINES-Part A March 15, 1993 Page A-6


PERSONS PER VEHICLE

CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE
VEHICLE OCCUPANCY SCATTERPLOT

HBW VEHICLE OCCUPANCIES

1.36 a

1,35 -

1.34 -

133 -

1,28 F

1.27 a a Oo

1.26 is)

1.25 e—t 1 L 1 M Ll 1 1 1 1
oO 0.2 0.4 0.6 0.8 1
(Millions)
POPULATION

Exhibit CS-A-5

39


1990 1980
Table Table__Title_

Total number
of data cells

1-19. N/A NUMBER OF PERSONS 16 YEARS AND OVER IN HOUSEHOLD(5) BY VEHICLES

AVAILABLE(9)

Universe: Households with at least one person 16 years and over

All households:

Total, vehicles available

No vehicles

1 vehicle

2 vehicles
3 vehicles
4 vehicles
5 vehicles
6 vehicles
7 or more vehicles
1 person 16 and over:

(Repeat VEHICLES AVAILABLE)

2 persons 16 and over:

(Repeat VEHICLES AVAILABLE)

3 persons 16 and over:

(Repeat VEHICLES AVAILABLE)
4 or more persons 16 and over:
(Repeat VEHICLES AVAILABLE)

1-20. N/A VEHICLES AVAILABLE(9) BY HOUSEHOLD INCOME IN 1989(26)

Universe: Households

Total, vehicles available:
All incomes
Less than $5,000
$5,000 to $9,999

$10,000
$12,500
$15,000
$17,500
$20,000
$22,500
$25,000
$27,500
$30,000
$32,500
$35,000
$37,500
$40,000
$42,500
$45,000
$47,500
$50,000
$55,000
$60,000
$75,000

$100,000 to $124,999
$125,000 to $149,999

to
to
to
to
to
to
to
to

to

$12,499
$14,999
$17,499
$19,999
$22,499
$24,999
$27,499
$29,999
$32,499
$34,999
$37,499
$39,999
$42,499
$44,999
$47,499
$49,999
$54,999
$59,999
$74,999
$99,999

1990 CTPP TABLE OUTLINES-Part 1

August 5, 1993

Page 1-7


1990 1980
Table__Table

Total number
Title of data cells

B-15. N/A

B-16. 1-12

B-17. 111-14

B-18. N/A

1990 CTPP TABLE OUTLINES-Part B February 1, 1993 Page B-7

AGGREGATE NUMBER OF VEHICLES USED INCARPOOLING(1) .......-0++2-00+

Universe: Workers 16 years and over in a carpool
Total

WORKERS PER CARPOOL(1) .... es eee e cece n eee e eee een ene e ten neees

Universe: Workers 16 years and over in a carpool
Total

VEHICLES AVAILABLE(6) BY MEANS OF TRANSPORTATION TO WORK(11) FOR

WORKERS INHOUSEHOLDS 2.0.0.0... cece ence eee ence eee e rene enens

Universe: Workers 16 years and over in households
Total, vehicles available:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
No vehicles:
(Repeat MEANS OF TRANSPORTATION)
1 vehicle:
(Repeat MEANS OF TRANSPORTATION)
2 vehicles:
(Repeat MEANS OF TRANSPORTATION)
3 vehicles:
(Repeat MEANS OF TRANSPORTATION)
4 or more vehicles:
(Repeat MEANS OF TRANSPORTATION)

TIME OF ARRIVAL AT WORK(7) BY MEANS OF TRANSPORTATION(10).... -.-+

Universe: Workers 16 years and over who did not work at home
Total, time of arrival at work:

All workers who did not work at home

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means
5:30 a.m. to 6:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
6:30 a.m. to 7:29 a.m.:




1990 1980
Table Table

Total number
Title of data cells

1-15. N/A

1-16. N/A

$5,000 to $9,999
$10,000 to $12,499
$12,500 to $14,999
$15,000 to $17,499
$17,500 to $19,999
$20,000 to $22,499
$22,500 to $24,999
$25,000 to $27,499
$27,500 to $29,999
$30,000 to $32,499
$32,500 to $34,999
$35,000 to $37,499
$37,500 to $39,999
$40,000 to $42,499
$42,500 to $44,999
$45,000 to $47,499
$47,500 to $49,999
$50,000 to $54,999
$55,000 to $59,999
$60,000 to $74,999
$75,000 to $99,999
$100,000 to $124,999
$125,000 to $149,999
$150,000 or more
No workers in household:
(Repeat HOUSEHOLD INCOME)
1 worker in household:
“(Repeat HOUSEHOLD INCOME)
2 workers in household:
(Repeat HOUSEHOLD INCOME)
3 workers in household:
(Repeat HOUSEHOLD INCOME)
4 or more workers in household:
(Repeat HOUSEHOLD INCOME)

MEDIAN HOUSEHOLD INCOME IN 1989(1) BY NUMBER OF WORKERS IN

[5 (0]U=)=15 (©) BD] (;) nn 6
Universe: Households

Total

No workers in household

1 worker in household

2 workers in household

3 workers in household

4 or more workers in household

MEAN HOUSEHOLD INCOME IN 1989(1) BY NUMBER OF WORKERS IN

[7 (0) 01215 (0) 0) (;) np 6
Universe: Households

Total

No workers in household

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993 Page 1-5


1990 1980 Total number
Table Table Title of data cells

8:15 a.m. to 8:29 a.m.
8:30 a.m. to 8:44 a.m.
8:45 a.m. to 8:59 a.m.
9:00 a.m. to 9:14 a.m.
9:15 a.m. to 9:29 a.m.
9:30 a.m, to 9:44 a.m.
9:45 a.m. to 9:59 a.m.
10:00 a.m. to 10:14 a.m.
10:15 a.m. to 10:29 a.m.
10:30 a.m. to 10:44 a.m.
10:45 a.m. to 10:59 a.m.
11:00 a.m. to 11:59 a.m.
12:00 p.m. to 12:59 p.m.
1:00 p.m. to 1:59 p.m.
2:00 p.m. to 2:59 p.m.
3:00 p.m. to 3:59 p.m.
4:00 p.m. to 4:59 p.m.
5:00 p.m. to 5:59 p.m.
6:00 p.m. to 6:59 p.m.
7:00 p.m. to 7:59 p.m.
8:00 p.m. to 8:59 p.m.
9:00 p.m. to 9:59 p.m.
10:00 p.m. to 10:59 p.m.
11:00 p.m. to 11:59 p.m.
12:00 a.m. to 4:59 a.m.

2-9. N/A NUMBER OF HOURS WORKED LAST WEEK(6) BY MEANS OF TRANSPORTATION
TOWORK(11) 0.0... cece cee ce cesses eneeneeneeenenees seeeeeeeenenenes 66
Universe: Workers 16 years and over
Total, number of hours worked last week:

All means of transportation

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

Worked at home
Less than 15 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)
15 to 20 hours:

1990 CTPP TABLE OUTLINES-Part 2 August 5, 1993 Page 2-5


1990 1980 Total number
Table Table Title of data cells

7:30 a.m. to 8:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
8:30 a.m. to 9:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
9:30 a.m. to 10:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
10:30 a.m. to 5:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)

2-19. N/A MEANS OF TRANSPORTATION TO WORK(10) BY TRAVEL TIME TO WORK(16) ..... 160
Universe: Workers 16 years and over who did not work at home
Workers who did not work at home:

All travel times

Less than 5 minutes

5 to 9 minutes

10 to 14 minutes

15 to 19 minutes

20 to 24 minutes

25 to 29 minutes

30 to 34 minutes

35 to 39 minutes

40 to 44 minutes

45 to 49 minutes

50 to 54 minutes

55 to 59 minutes

60 to 74 minutes

75 to 89 minutes

90 minutes or more
Drove alone:

(Repeat TRAVEL TIME TO WORK)
In 2-person carpool:

(Repeat TRAVEL TIME TO WORK)
In 3-person carpool:

(Repeat TRAVEL TIME TO WORK)
In 4-or-more-person carpool:

(Repeat TRAVEL TIME TO WORK)
Bus or trolley bus:

(Repeat TRAVEL TIME TO WORK)
Streetcar, trolley car, subway, or elevated:

(Repeat TRAVEL TIME TO WORK)
Railroad:

(Repeat TRAVEL TIME TO WORK)
Bicycle or walked:

(Repeat TRAVEL TIME TO WORK)

1990 CTPP TABLE OUTLINES-Part 2 August 5, 1993 Page 2-9


UME

PB98-114465

CTPP

Handbook

An Instructional Guide
to the 1990 Census
Transportation Planning
Package

February 1995

@

U.S. Department of Transportation
Federal Highway Administration

National Technical Information Service


1990 1980

Table Table __Title _

Total number
of data cells

1-57. N/A

(Repeat TIME LEAVING HOME TO GO TO WORK)
In 4-or-more-person carpool:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Bus or trolley bus:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Streetcar, trolley car, subway, or elevated:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Railroad:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Bicycle or walked:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Taxicab, ferryboat, motorcycle, or other means:

(Repeat TIME LEAVING HOME TO GO TO WORK)

STANDARD DEVIATION OF TRAVEL TIME IN MINUTES(1) BY MEANS OF
TRANSPORTATION(10) BY TIME LEAVING HOME TO GO TO WORK(7)
Universe: Workers 16 years and over who did not work at home

All workers who did not work at home:

All departure times

5:30 a.m. to 6:29 a.m.

6:30 a.m. to 7:29 a.m.

7:30 a.m. to 8:29 a.m.

8:30 a.m. to 9:29 a.m.

9:30 a.m. to 10:29 a.m.

10:30 a.m. to 5:29 a.m.
Drove alone:

(Repeat TIME LEAVING HOME TO GO TO WORK)
In 2-person carpool:

(Repeat TIME LEAVING HOME TO GO TO WORK)
in 3-person carpool:

(Repeat TIME LEAVING HOME TO GO TO WORK)
In 4-or-more-person carpool:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Bus or trolley bus:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Streetcar, trolley car, subway, or elevated:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Railroad:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Bicycle or walked:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Taxicab, ferryboat, motorcycle, or other means:

(Repeat TIME LEAVING HOME TO GO TO WORK)

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993

Page 1-23


1990 1980 Total number
Table Table Title of data cells

A-58. N/A TOTAL HOUSING UNITS(1) 20... cc cece cece een e tenet eeee 1
Universe: Housing units
Total

A-59. N/A UNWEIGHTED SAMPLE COUNT OF HOUSING UNITS(1) ...... 000s eee e ee eee eee 1
Universe: Housing units
Total

A-60. N/A PERCENT OF HOUSING UNITS IN SAMPLE(1) ..... 6-0 cece cree cece e een e enna 1
Universe: Housing units
Total

A-61. N/A VACANCY STATUS(6) ..
Universe: Vacant housing uni
Total
For rent
For sale only
For seasonal, recreational, or occasional use
All other vacants

A-62. 1-13 | OCCUPANCY STATUS(8) BY UNITS INSTRUCTURE(7) ........ 6. eee e eee ee eens 21
Universe: Housing units
Total, occupancy status:
Total, units in structure
1 unit, detached
1 unit, attached
2 to 4 units
5 or more units
Mobile home or trailer
Other
Occupied:
(Repeat UNITS IN STRUCTURE)
Vacant:
(Repeat UNITS IN STRUCTURE)

A-63. N/A AGGREGATE VEHICLES AVAILABLE(1) 6.0... eee eee cece eee e eee e eee e ene 1

Universe: Occupied housing units
Total

TOTAL NUMBER OF DATA CELLS IN PART A: 2,481

PART A RECORD SELECTION CRITERIA: All persons, households, and workers who live In
the State, and all housing unlts located In the
State.

1990 CTPP TABLE OUTLINES—Part A March 15, 1993 Page A-24


CASE STUDY: ASSESSING COMMUTER BUS SERVICE

Step 6

6.1

6.2

35%

30%

25%

20%

15%

Percent Transit

10%

Graph results using an XY-type graph available in Lotus 1-2-3. Select Step
6 from the menu and press M for menu help or press any other key to
complete Step 6 without the menu.

You will need to sort the data, in ascending order, on the estimated percent
transit column. All columns should be included in the sort range.

First graph the estimated versus actual percent transit. The estimated
percent transit should appear as a line (no symbols) and the actual percent
transit should appear as symbols (no line) with each symbol having a travel
shed label. The graph should look like this:

TRAVEL TIME VS. MODE SHARE

L L 1 L 1 A 1 fan L 1

1 Ww 1.2 13 1.4

Transit/Auto Travel Time Rotio
Estimated Ridership + Actual Ridership

The travel sheds below the line are those with percent transit lower than expected. Those
above the line are operating better than expected.

62


CASE STUDY: ASSESSING COMMUTER BUS SERVICE

This step has already been done. The CBD Traffic Analysis Zones are shown below:

TAZ Map 1, Identify CBD TAZs

Exhibit CS-B-2

48


-QUESTIONSJASKED OR ALE HOUSERIOLDS|

PERSON 7 NOW PLEASE ANSWER QUESTIONS Hla—H26 FOR YOUR HOUSEHOLD
boll Ha. Did you leave anyone out of your list of persons for If this is a ONE-FAMILY HOUSE —
Question 1a on page 1 because you were not sure if Ha. 1s this house on ten or more acres?
Lidia ae ned the person should be listed ~ for example, someone
temporarily away on a business trip or vacation, a © Yes Oo No
Ma RELATIVE of Person 1: newborn baby still In the hospital, or a person who bs Te there a business (puch as aatore
: ‘or barber shop)
© Husband/uite © Brother/sister stays here once in a while and has no other home? -or a medical ofice on this property?
© Natural-born O Father/mother © Yes, please print the name(s) © No a
or adopted © Grandchild and reason(s). O Yes © No
/ daught °
© Sepon/ “Answer only if you or someone in this household OWNS
stepdaughter OR IS BUYING this house or apartment —
on. -- == H6, What is the value of this property; that is, how much
HNOT RELATED to Person . Did you include anyone in your list of persons for do you think this house sad lot o¢ condorninturn wan
© Roomer, boarder, O Unmarried Question 1a on page 1 even though you were not sure would sell for if it were for sale?
or foster child partner BW that the person should be listed — for example, a
© Housemate, guy © Other visitor who Is staying here temporarily or a person who © Less than $10,000 © $70,000 to $74,999
roommate nonrelative usually lives somewhere else? © $10,000 to $14.999 0 $75,000 to $79,999
© Mal © Female © Yes, please print the name(s) © No © $15,000t0 $19.999 © $80,000 to $89,999
ae emal and reasons. © $20,000 t0 $24,999 0 $90,000 10 $99.99
O° Whi © $25,000 to $29,999 O $100,000 to $124,999
° Bleck — © $30,000 to $34,999 © $125,000 to $149,999
° De A pint th name of the _ _ _ © $35,000 to $39.999 0 $150,000 to $174,999
in n (Amer. | nd ad 2. Which best ibes this building? Include all © $40,000 to $44,999 O $175,000 to $199,999
apartment, las, ete, even if vacant. © $45,000 to $49,999 0 $200,000 to $249,999
© Amotile home o waler © $50,000 to $54.99 © $250,000 10 $299,999
© Eikimo © Acne family house detached tom any other house © $55,000t0 $59,999 0 $300,000 to $399,999
Aleut m any “ © $60,000 t0 $64,999 —O _ $400,000 to $499,999
Asian of Pacific Islander (API) © Aone-family house attached to one or more houses
ee © Abuilding with 2 a ts © $65,000 to $69,999 © $500,000 or more
© Chinese © Japanese ‘Wi ag eae
" © Abuilding with 3 or 4 apartments
© Filpino MMO Asian Indian O Abullding with 5 to9
© Hawaiian © Samoan ihn with S to 9 apartments
© ke ele © Abuilding with 10 to 19 apartments “Answer only f you PAY RENT lor this house or apartment —
oO Vee ° ‘uamanian © Abuilding with 20 to 49 apartments. H7a. What is the monthly rent?
Bruising with 50 or more aparments © Less than $80 © $375 to $399
© $8010 $99 © $400 to $424
|H3. How many rooms do you have in this house or apartment? © $100t0 $124 © $425 to $449
= Do NOT count bathrooms, porches, balconies, foyers, halls, © $125 10 $149 © $450 to $474
; ; va or hal-roams. © $1500 $174 O $475 10 $499
H H © $1750 $199 © $500 to $524
Le oe ed 82 Ll 8 en ° grooms © $200t0$224 MO $525 t0 $549
000000 j1@e800000 © icone © brooms 8 Seems O $2250 $249 © $550 t0 $599
101010 901010 rooms rooms foome. © $250t0 $274 © $600 to $649
3030 30.30. [Ae Wiishouscrsparinen— © Hows =O Srovws709
to
4040] pe 4040 © ovr by you or someone inthis household m0 825105349 © 375010 $999
eoee aos © Owned by you or someone in this household free °. to $374 © $1,000 oF more
7070 7070 and clear (without a mortgage] ? b, Does the monthly rent include any meals?
BOBO 8080 © Rented for cash rent?
9090 9090 © Occupied without payment of cash rent? © Yes © No
FOR CENSUS USE
3 Tawmarned 8 peperated 4 B, Type of unit D. Months vacant G. DO 1D Z
fever marrie = 2
© Divorced . Occupied Vacant © Lessthan! © 6uptol2
© lupto2 © 12upto24|! |
© No (not Spanish/Hispanic) © Pistform O Reguisr | 6 2upto6 O 24ermore |i |
. © Conn © Usual home had
© Yes, Mexican, Mexican-Am., Chicano +
© Yes, Puerto Rican gy °° sisewhere_|E. Complete after ©0208 0000000
© Yes, Cuban Ir | Ek: Vacancy status ow otcoga ir rrrrrrrrig
© Yes, other Spanish/Hispanic 2@ @ OPFORE OWT Of @€@ € @ €@ et Ft E
3 | O Forrent © Forseas/ | 6 My 0 ED O EN 33333333333
Bg | © Ferstleonty rec/oce | a erarararard paar
s | ° Reuse © Fermarent | > po o p30 6 5933555355355
6 occupied s Jopropaot K7,g 6666666666
z Obervecsnt! 5 pp ops OSM Oo|27 772777227777
8 e282 8 8 8 8 8
° 5 | £2; lethisunit boarded up? | F. Cov. 3 55959959
° © Yes © No Ob Ol O7 0H)

Page 3

9
z
6
s
3

OnMeruarau

mad


1990 1980 Total number
Table Table _ Title of data cells

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated
Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means
Worked at home

A-47. 1-24 | MEAN HOUSEHOLD INCOME(1) BY MEANS OF TRANSPORTATION TO WORK(11)
FOR WORKERS INHOUSEHOLDS 2.0.0... ccc e eee n eee e eee eee e nen e een ennnes 1
Universe: Workers 16 years and over in households
Total
Drove alone
In 2-person carpool
in 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home

A-48. 1-27 VEHICLES AVAILABLE(6) BY MEANS OF TRANSPORTATION TO WORK(11) FOR
WORKERS INHOUSEHOLDS 1.0... 0 cece e cece eee erence nent e teen eens 66
Universe: Workers 16 years and over in households
Total, vehicles available:

All means of transportation

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

Worked at home
No vehicles:

(Repeat MEANS OF TRANSPORTATION)
1 vehicle:

(Repeat MEANS OF TRANSPORTATION)
2 vehicles:

(Repeat MEANS OF TRANSPORTATION)
3 vehicles:

(Repeat MEANS OF TRANSPORTATION)
4 or more vehicles:

(Repeat MEANS OF TRANSPORTATION)

1990 CTPP TABLE OUTLINES—Part A March 15, 1993 Page A-19




are cross-tabulated by a variety of characteristics, including age, sex, employment status,
vehicles available, income, etc. Which of these cross-tabs will be helpful to you as you
conduct the analysis?

If you decide to conduct an analysis using the CTPP Urban Element, which contains
data summaries by census tract or traffic analysis zone, it may be necessary to combine
or aggregate areas. In the above corridor analysis example, you will likely have to identify
the TAZs in which the employment center is contained, then group them accordingly to
summarize the characteristics of workers by their place of work. If you analyze those
workers by where they live, then you will need to aggregate place of residence TAZs to
perform the analysis.

Other manipulations of the data may be needed, depending on the analysis.
Remember that you won't be able to disaggregate CTPP tables, but you can combine
them. You can also combine data cross-tabulations, such as age categories, or means of
transportation. For example, you may be interested in defining the means of transportation
to work for females, ages 16 to 24. You could combine several age categories to conduct
this analysis. Also, If you are trying to analyze travel other than the trip from home to work,
then you may have to convert the CTPP data (as described briefly in Chapter 3) or use
other data sources to enhance the information contained in the CTPP.

Finally, you need to ask yourself if there have been any major physical changes in
the area or changes in travel modes since 1990. If a new beltway has been completed,
a light rail transit line developed or if a major employer has relocated, the 1990 CTPP will
not reflect potential travel and place of work changes. Therefore, you will need to do some
preliminary research about the study area before using the CTPP and making quick
assumptions from the data. You might consider checking other sources of information to
determine if there are reasons that the CTPP data might need to be adjusted, and if so,
in what manner. If the study area has remained reasonably constant, then the CTPP can
be an excellent source of baseline data for residence, workplace and journey-to-work
characteristics.

On the following page, questions are posed to reinforce the steps necessary to
prepare for analysis with the CTPP. The example problem of developing a transit plan is
used. Answer the questions as best as you can, and then compare your answers with
those given on page 20.

18


1990 1980 Total number
Table Table Title of data cells.

In 3-person carpool:

(Repeat TIME LEAVING HOME TO GO TO WORK)
In 4-or-more-person carpool:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Bus or trolley bus:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Streetcar, trolley car, subway, or elevated:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Railroad:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Bicycle or walked:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Taxicab, ferryboat, motorcycle, or other means:

(Repeat TIME LEAVING HOME TO GO TO WORK)

A-57. N/A STANDARD DEVIATION OF TRAVEL TIME IN MINUTES(1) BY MEANS OF
TRANSPORTATION(10) BY TIME LEAVING HOME TO GO TO WORK(7) .........+-+ 70
Universe: Workers 16 years and over who did not work at home
All workers who did not work at home:

All departure times

5:30 a.m. to 6:29 a.m.

6:30 a.m. to 7:29 a.m,

7:30 a.m. to 8:29 a.m.

8:30 a.m. to 9:29 a.m.

9:30 a.m, to 10:29 a.m.

10:30 a.m. to 5:29 a.m.
Drove alone:

(Repeat TIME LEAVING HOME TO GO TO WORK)
In 2-person carpool:

(Repeat TIME LEAVING HOME TO GO TO WORK)
In 3-person carpool:

(Repeat TIME LEAVING HOME TO GO TO WORK)
In 4-or-more-person carpool:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Bus or trolley bus:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Streetcar, trolley car, subway, or elevated:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Railroad:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Bicycle or walked:

(Repeat TIME LEAVING HOME TO GO TO WORK)
Taxicab, ferryboat, motorcycle, or other means:

(Repeat TIME LEAVING HOME TO GO TO WORK)

1990 CTPP TABLE OUTLINES—Part A March 15, 1993 Page A-23


1990
Table

1980
Table

Total number
Title _of data cells

N/A

N/A

AGGREGATE NUMBER OF VEHICLES USED IN CARPOOLING(1) BY TIME LEAVING

HOME TO GO TO WORK-TOTAL AND PEAK PERIOD(2) .......... eee eee eee 2
Universe: Workers 16 years and over in a carpool

Total, time leaving home to go to work

Peak period (6:30 a.m. to 8:29 a.m.)

WORKERS PER CARPOOL(1) BY TIME LEAVING HOME TO GO TO WORK-TOTAL

AND PEAK PERIOD(2) ........0 cee cece eee en ene e een nees 2
Universe: Workers 16 years and over in a carpool

Total, time leaving home to go to work

Peak period (6:30 a.m. to 8:29 a.m.)

MEDIAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF TRANSPORTATION(19)
BY TIME LEAVING HOME TO GO TO WORK-TOTAL AND PEAK PERIOD(2).......... 38
Universe: Workers 16 years and over who did not work at home
Total, time leaving home to go to work:

Workers who did not work at home

Drove alone

In 2-person carpool

In 3-person carpool

In 4-person carpool

In 5-person carpool

In 6-person carpool

In 7-to-9-person carpool

In 10-or-more-person carpool

Bus or trolley bus

Streetcar or trolley car

Subway or elevated

Railroad

Ferryboat

Taxicab

Motorcycle

Bicycle

Walked

Other means
Peak period (6:30 a.m. to 8:29 a.m.):

(Repeat MEANS OF TRANSPORTATION)

MEAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF TRANSPORTATION(19)
BY TIME LEAVING HOME TO GO TO WORK-TOTAL AND PEAK PERIOD(2).......... 38
Universe: Workers 16 years and over who did not work at home
Total, time leaving home to go to work:

Workers who did not work at home

Drove alone

In 2-person carpool

In 3-person carpool

In 4-person carpool

In 5-person carpool

In 6-person carpool

1990 CTPP TABLE OUTLINES-Part 3 August 5, 1993 Page 3-2


APPENDIX B

1990 CENSUS QUESTIONNAIRE



Pagel

The 1990 census must count every person at his or her “usual residence.” This means the place where the
person lives and sleeps most of the time.

la.

1b.

List on the numbered lines below the name of each person living here on Sunday,
April 1, including all persons staying here who have no other home. If EVERYONE at
this address is staying here temporarily and usually lives somewhere else, follow the
instructions given in question 1b below.

Include Do NOT include
* Everyone who usually lives here such as family * Persons who usually live somewhere else.

members, housemates and roommates, foster
children, roomers, boarders, and live-in

employees

* Persons who are temporarily away on a business * Persons who are away in an institution such as a
trip, on vacation, or in a general hospital prison, mental hospital, or a nursinghome ~

* College students who stay here while * College students who live somewhere else while
attending college attending college

* Persons in the Armed Forces who live here * Persons in the Armed Forces who live somewhere

* Newbom babies still in the hospital else

* Children in boarding schools below the
college level .

* Persons who stay here most of the week * Persons who stay somewhere else most of the
while working even if they have a home week while working

somewhere else
* Persons with no other home who are staying
here on April 1
Print last name, first name, and middle initial for each person. Begin on line 1 with the household

member (or one of the household members) in whose name this house or apartment is owned, being
bought, or rented. If there is no such person, start on line 1 with any adult household member.

LAST FIRST INITIAL LAST FIRST INTIAL
1
2
3
4 10
5 mel
6 12

If EVERYONE is staying here only temporarily and usually lives somewhere

else, list the name of each person on the numbered lines above, fill this circle —+ 0
and print their usual address below. DO NOT PRINT THE ADDRESS LISTED

ON THE FRONT COVER.

House number ‘Street or road/Rural route and box number ‘Apariment number
City State ZP Code
County or foreign country Names of nearest intersecting streets or roads

NOW PLEASE OPEN THE FLAP TO PAGE 2 AND ANSWER ALL QUESTIONS FOR THE FIRST 7
PEOPLE LISTED. USE A BLACK LEAD PENCIL ONLY.


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE

Step 3 Determine Vehicle Occupancies and Mode Splits by Urban Area

3.1. Download CTPP Table C-3, Vehicle Occupancies (this has been done and
is stored in file VEH-OCC.PRN)

3.2 Download CTPP Table C-1, Workers by Time Leaving Home to Go to Work
and Means of Transportation (this has been done and is stored in file JTW-
MODE.PRN)

3.3. Calculate mode split (non-vehicle work trips) using the following formula:
Mode Split = Non-Vehicle Trips/Total Trips

The spreadsheet formula automatically entered in cell E8 is:
+G8/F8

NOTE: Non-vehicle work trips refers to all modes other than personal automobile (the
Census questionnaire asks how many vehicles are available in the household).

reen Shoul ike This:

EB: (P1) +G8/F8 Press Enter to return to menu

A B c D E F 6
1 VEHICLE OCCUPANCIES AND MODE SPLIT BY URBAN AREA
2
3 Non-
4 sTW Total Vehicle
5 Vehicle Mode sTW aTW
6 City Population Occupancy Split Trips Trips
To ceteeeeceeeeeeeneee cence encecececeececesenaecesensenerseceseeeenone
8 1 50,000 1.25 0.1% 28, 465 28
9 2 65,000 1.36 0.1% 39,502 40
10 3 150,000 1.30 0.1% 97,941 98
"1 4 225,000 1.27 0.1% 165,746 166
12 5 275,000 1.31 0.3% 194,751 584
3 6 550,000 1.29 0.8% 373,323 2,987
6 7 675,000 1.27 0.9% 466,160 4,195
15 8 850,000 1.26 1.9% 547,882 10,410
16 9 950,000 1.27 2.0% 623,660 12,473
7
18
19
20
21-May-92 08:55 AM CHD

30


[QUESTIONS ASKED OA SAMPLE ORROUSEHOED:

Reproduced from
best available cop)

=" many bedrooms would you list i this house or

apartment were on the market for sale or rent?

000000
oe

ze
is

115. Do you get water from —

© Apublic system such as a cty water
department, or private company?

© An individual dried wel?

© An individual dug well?

© Some other source such as. spring,
creek, river, cistem, etc.?

‘Do you have COMPLETE plumbing fac
in this house or apartment; that is, 1) hot and
cold piped water, 2) a flush toilet, and 3) a
bathtub or shower?

© Yes, have all three facilities
© No

HI6. Is this building connected to a public sewer?

© Yes, connected to public sewer

© No, connected to septic tank or cesspool

© No, use other means

E

. Do you have COMPLETE kitchen facilities;

that is, 1) a sink with piped water, 2) a range
of cookstove, and 3) a refrigerator?

© Yes
© No

HI7. About when was this building first built?

1989 or 1990
1985 to 1988
1980 to 1984
1970 to 1979
1960 to 1969
1950 to 1959
1940 to 1949
1939 of earber
Don’t know

000000000

‘Do you have a telephone in this house or
apartment?

1s this house or apartment part of a
‘condominium?

© Yes
O No

you lve in an apartment building, skip to H20.

Page 4 PLEASE ALSO ANSWER TH
H8. When did the person listed in column 1 on H14, Which FUEL is used MOST for heating this, 20. What are the yearly costs of utilities and
page 2 move into this house or apartment? house or apartment? fuels for this house or apartment?

you have lived here lex than 1 year,

© 1989 o 1990 © Gas: from underground pipes ‘estimate the yearly cost.
© 1985 to 1968 serving the neighborhood
© 1980 to 1984 © Gas: bottled, tank, or LP_
© 197010 1979 © Electrcty a.Blectricity
© 1960 to 1969 © Fuel oll, kerosene, etc.
O 1959 or earber a © Coalor coke

© Wood

© Solar energy

H9. How many bedrooms do you have; that is, how © Other fuel
© Nofuel used

OR

(© Inclided in rent or in condominium fee.
© No charge or gas not used

GevnwPUaNHY

c. Water

(©. Included in rent of in condominium fee
© No charge

CHNKBVANHYD

HI13.

Hew many automobiles, vans, and trucks of
‘one-ton capacity or less are kept at home for

‘use by members of your household?

© None a

o1

02

°3

o4

o5

06

© To more

H19a. Is this house on less than 1 acre?

© Yes — Skip to H20
© No

b. In 1989, what were the actual sales of all agricultural

products from this property?

None
$110 $999

$1,000 to $2,499
$2,500 to $4,999
$5,000 to $9,999

000000

OR

© Incuded in rent or in condomintum fee
© Nocharge or these fuels not used

$10,000 or more

The-sarny

le/questionne ire ‘contains, housing ‘questions.
H8 to 26, shown vn here on‘pageés 4 and 5.



1990 1980
Table__Table

Total number
Title of data cells

B-20. N/A

B-21. N/A

B-22. N/A

MEDIAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(10) .. 0.0.0 cece cece cece tence ence ence nee e eens e tees 10
Universe: Workers 16 years and over who did not work at home
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

MEAN TRAVEL TIME TO WORK (IN MINUTES)(1) BY MEANS OF
TRANSPORTATION(10) 0.0... cece cece eect eee eee cence ene teen nnn eees 10
Universe: Workers 16 years and over who did not work at home
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

MEDIAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(19) 00.0.0. 0 ccc cece cence rece eee ee ee eee ences nen e eee 19
Universe: Workers 16 years and over who did not work at home
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-person carpool

In 5-person carpool

In 6-person carpool

In 7-to-9-person carpool

In 10-or-more-person carpool

Bus or trolley bus

Streetcar or trolley car

Subway or elevated

Railroad

Ferryboat

Taxicab

Motorcycle

Bicycle

Walked

Other means

1990 CTPP TABLE OUTLINES-Part B February 1, 1993 Page B-9


1990 1980
Table__Table

Title

Total number
of data cells

1-34, 1-23

1-35. 1-23

1990 CTPP TABLE OUTLINES—Part 1

(Repeat MEANS OF TRANSPORTATION)
$10,000 to $14,999:

(Repeat MEANS OF TRANSPORTATION)
$15,000 to $19,999:

(Repeat MEANS OF TRANSPORTATION)
$20,000 to $24,999:

(Repeat MEANS OF TRANSPORTATION)
$25,000 to $29,999:

(Repeat MEANS OF TRANSPORTATION)
$30,000 to $34,999:

(Repeat MEANS OF TRANSPORTATION)
$35,000 to $49,999:

(Repeat MEANS OF TRANSPORTATION)
$50,000 to $74,999:

(Repeat MEANS OF TRANSPORTATION)
$75,000 or more:

(Repeat MEANS OF TRANSPORTATION)

No eamings:

(Repeat MEANS OF TRANSPORTATION)

MEDIAN EARNINGS OF WORKERS(1) BY MEANS OF TRANSPORTATION(11)
Universe: Workers 16 years and over with earnings

Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated
Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

Worked at home

MEAN EARNINGS OF WORKERS(1) BY MEANS OF TRANSPORTATION(11)
Universe: Workers 16 years and over with earnings

Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated
Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

Worked at home

August 5, 1993

Page 1-14


Reproduced from
best available cop’

QUESTIONS FOR YOUR HOUSEHOLD

Answer questions H21 TO H26, i this
2 one-family house, a condominium, or
2 mobile homme that someone in this
household OWNS OR IS BUYING;
otherwise, go to page 6.

H21. What were the real estate taxes on THIS
property last year?

OR

© None

H22. What was the annual payment for fire, hazard,
and flood insurance on THIS property?

OR

Go to H23
© Yes, contrac to purchase
© No— Skip to H24a

b. How much is your regular monthly mortgage
payment on THIS property? Include payment only
on first mortgage or contract to purchase.

© Noregular payment required — Skip to H24a

€. Does your regular monthly mortgage payment
include payments for real estate taxes on THIS
Property?

© Yes, taxes included in payment
© No, taxes paid separately or taxes not required

23a. Do you have a mortgage, deed of trust, contract | H24a. Do you have a second or junior
to purchase, or similar debt on THIS property? mortgage or a home equity loan on
‘THIS property?
INSTRUCTION: © Yes, mortgage, deed of rus.
or similar debt © Yes

© No— Skip to H25

‘Answer ONLY if this is a CONDOMINIUM ~
H25, What is the monthly condominium fee?

‘Answer ONLY if this is a MOBILE HOME —
H26. What was the total cost for personal
Property taxes, site rent, registration fees,
and license fees on this mobile home and
its site last year? Exclude real estate taxes.

i

SenHPVaRDY

OHNOPORHHY



CASE STUDY: ASSESSING COMMUTER BUS SERVICE

Questions to be answered:

1.

What CTPP table would you download for JTW trips (refer to Appendix)?

What is the total number of trips to the CBD? What travel shed generates
the most trips?

What CTPP table would you download for JTW travel times? When would
you use median travel times? Why?

What is the average travel time from travel shed 1 to the CBD? How would
you calculate a weighted average time?

How would you calculate total travel times given number of trips and travel
times?

What is the total Person Hours Traveled (PHT) to the CBD? What
percentage of the PHT is by transit?

54


1990 1980
Table__Table

Total number
Title of data cells

B-11. 111-4

B-12. 111-4

B-13. [11-10

B-14. HI-11

(Repeat MEANS OF TRANSPORTATION)
$25,000 to $29,999:
(Repeat MEANS OF TRANSPORTATION)
$30,000 to $34,999:
(Repeat MEANS OF TRANSPORTATION)
$35,000 to $49,999:
(Repeat MEANS OF TRANSPORTATION)
$50,000 to $74,999:
(Repeat MEANS OF TRANSPORTATION)
$75,000 or more:
(Repeat MEANS OF TRANSPORTATION)
No earnings:
(Repeat MEANS OF TRANSPORTATION)

MEDIAN EARNINGS OF WORKERS(1) BY MEANS OF TRANSPORTATION(11) ...... 11
Universe: Workers 16 years and over with earnings
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated
Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means
Worked at home

MEAN EARNINGS OF WORKERS(1) BY MEANS OF TRANSPORTATION(11) .....-.- 11
Universe: Workers 16 years and over with earnings
Total

Drove alone

in 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated
Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means
Worked at home

AGGREGATE NUMBER OF VEHICLES USED IN TRAVEL TOWORK(1) ..........+4-- 1
Universe:Workers 16 years and over using a car, truck, or van
Total

WORKERS PER VEHICLE(1) 00.0... c eee c eee c ete eee e eee e ene ee en ence 1
Universe: Workers 16 years and over using a car, truck, or van
Total

1990 CTPP TABLE OUTLINES-Part B February 1, 1993 Page B-6


modeling process, the CTPP JTW data can be used to check model output for
reasonableness.

Usual and Average Day Conditions

Before conducting such modeling checks, the user should be cautioned that the
Census reports travel in terms of usual day conditions, but that travel demand models
typically produce output for average day conditions. Because of the wording of the
Census JTW questions (Questions 22-24 in Appendix B), the CTPP JTW data does not
contain information about chained trips, mode shifts, absent workers or the trip from
work to home, these are all part of an "average" day of trip-making. On an average day,
people get sick and stay home from work; cars won't start, so travelers shift modes; and
people make intermediate stops to run errands. These travel nuances are not captured
in the Census questionnaire, which asks only how travel was usually completed last week.
In addition, the CTPP only contains information about the mode used for the longest
segment of the trip to work (rather than all modes used in the trip to work), and information
only for the job at which the respondent worked the most. Thus, second jobs are excluded.
Furthermore, the Place of Work coding does not accurately account for those who have
no fixed place of work, such as construction workers and some sales people. This
suggests that the CTPP data needs to be converted from usual day to average day
conditions.

Information needed to make the conversion from usual to average day conditions
is typically taken from travel diary surveys and local data sources. Trip chaining, second
jobs and mode shifts come from household travel surveys. Absentee factors and
adjustments for those without a fixed workplace may come from local employment data or
by checking with local employers. These conversions must take place before comparing
CTPP JTW data with model estimated Home-Based Work trips.

The CTPP can be used to check model output at each step in the modeling process.

e Trip generation checks can be made by comparing the CTPP JTW data
(after converting the data to average day conditions) with model generated
Home-Based Work productions and attractions to identify discrepancies
where more detailed analysis must take place.

e Trip distribution checks can be made by comparing Census-reported travel
times for the JTW with model-produced work trip travel times and trip
lengths, and by making trip table comparisons (as shown in Exhibit 3-1).

e Mode split comparisons can also be made by using the CTPP to identify
transit dependent riders through tables on automobile availability, income
levels, mobility limitation status and age.

. Sensitivity checks can also be made for those choice transit riders by using

the CTPP to analyze automobile vs. transit travel times, departure times,
worker density and occupation/class of worker. Again, it should be noted

72


CASE STUDY OVERVIEW

Travel Demand Characteristics by Urban Area Size

y Step 1
Identify and Classify
State’s Urban Areas

Step 4
Step 2 Step 3 Determine The Step 5
Calculate Trip Rates Determine Vehicle Percentage of Daily pofemmine Daily/
By Urban Area Occupancies and Mode JTW Trips Occurring] eak oe Lengths
Splits By Urban Area In The Peak Period By Urban Area
By Urban Area

Step 6
Graph and Summarize Relationships
Between Travel Characteristics and
Urban Area Size (Population)

Exhibit CS-A-1

24



1990 1980
Table__Table

Title

Total number
of data cells

A-31. N/A

In 5-person carpool

In 6-person carpool

In 7-to-9-person carpool
In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad

Ferryboat

Taxicab

Motorcycle

Bicycle

Walked

Other means

Worked at home

TIME LEAVING HOME TO GO TO WORK(39)
Universe: Workers 16 years and over who did not work at home

Total

5:00 a.m. to 5:14 a.m.
5:15 a.m. to 5:29 a.m.
5:30 a.m. to 5:44 a.m.
5:45 a.m. to 5:59 a.m.
6:00 a.m. to 6:14 a.m.
6:15 a.m. to 6:29 a.m.
6:30 a.m. to 6:44 a.m.
6:45 a.m. to 6:59 a.m.
7:00 a.m. to 7:14 a.m.
7:15 a.m. to 7:29 a.m.
7:30 a.m. to 7:44 a.m.
7:45 a.m. to 7:59 a.m.
8:00 a.m. to 8:14 a.m.
8:15 a.m. to 8:29 a.m.
8:30 a.m. to 8:44 a.m.
8:45 a.m. to 8:59 a.m.
9:00 a.m. to 9:14 a.m.
9:15 a.m. to 9:29 a.m.
9:30 a.m. to 9:44 a.m.
9:45 a.m. to 9:59 a.m.
10:00 a.m. to 10:14 a.m.
10:15 a.m. to 10:29 a.m.
10:30 a.m. to 10:44 a.m.
10:45 a.m. to 10:59 a.m.
11:00 a.m. to 11:59 a.m.
12:00 p.m. to 12:59 p.m.
1:00 p.m. to 1:59 p.m.
2:00 p.m. to 2:59 p.m.
3:00 p.m. to 3:59 p.m.
4:00 p.m. to 4:59 p.m.
5:00 p.m. to 5:59 p.m.

1990 CTPP TABLE OUTLINES-Part A

March 15, 1993

Page A-12


@ TIGER’

l§ Traffic Analysis

Zones (TAZ)*

@ Travel Shed

@ Trip Chaining

@ Universe*

@ Urban Element*

Topologically Integrated Geographic Encoding and
Referencing System. Nationwide database containing
roads, water boundaries and Census geography (tracts
and block groups). Used as a base in many GIS
applications.

Level of geographic detail used in most transportation
planning applications to summarize socio-economic
characteristics and travel data. TAZs vary in size
depending on density and homogeneity of land uses,
and are defined by local agencies.

A term used to describe a relatively distinct geographic
area served by a key transportation system component,
such as a transit line.

A term used to refer to the phenomenon of making
intermediate stops as part of a longer trip. For
example, stopping at a convenience store or the day
care center as part of the trip from home to work.
Chained trips were not reported in the 1990 Census,
and therefore, are not reflected in the Journey-to-Work
data.

The unit being measured in the CTPP tables (e.g.,
Workers 16 years and over). The tables often define
the characteristics of the universe by other variables,
such as means of transportation to work, age or
income. These are called cross-tabulations.

The Urban Element contains a more detailed summary
of Census data for urbanized areas (50,000 population
or more). Data are summarized at the Census tract or
Traffic Analysis Zone (TAZ) level. Totals are also
provided for the urbanized area, the Metropolitan
Statistical Area (MSA) and special study areas (if
defined).


that the CTPP JTW data will need to be converted into daily Home-Based
Work data before these checks can be made.

TRIP TABLE CHECKS
GRAVITY MODEL RESULTS
off Exhibit 3-1 shows three trip
1 [4 ed
pO) ves) oss) poe | ar | spss tables; the first two tables
ES 9 9 9) (top and center) were creat-
ae en ee ed from a travel demand
5 Lum] «| m| so] ») 2[ ner r
6 | _m| wo] | as| nwo model and the CTPP, while
Too [es] ise] ou] twos | tar | oo | som the third (bottom) table
ENS summarizes _ differences
ri a
[ate ml map me between the first two tables.
2 | wef sof ef ser] se] of see The left column and top row
3 pom) | «| | | | ow . f
wash orl nel me [ | |e are the Traffic Analysis
3p om| | af =) «| | uss Zones for the urban area.
£ a The third trip table shows
Tor | wo[ sa] oe] oe | wm es | __ ro .
Tor DIVERENCE the percent difference be-
1J2[3]< s | 6 | tos tween the two tables, allow-
: 7 2 . ing you to identify potential
3 wl s|_ al} tls problem areas where your
‘ Sd) Dd model and CTPP data do
SE ETT EEE EEE ROE not correspond.
«ft s[ a] ap als] a] =
vr | sf al 2 al ef =| 3
Exhibit 3-1

Using the CTPP Directly for Analysis

The conversions of Census JTW data mentioned above are not needed for all types
of analysis. There are a number of cases in which transportation planners can take the
data in CTPP tables for direct analysis of existing conditions. In this case, the CTPP
provides a "snapshot" of conditions as they were in 1990, and can be used for comparison
with other data sources collected more recently.

The reader should note that the analysis universe (e.g., the item being measured)
must be contained in the CTPP before direct analysis can take place. For example,
workers over age 16 is a universe in the CTPP, whereas Vehicle Miles of Travel (VMT) is
not in the CTPP and cannot be measured using Census data. The universe for certain
tables is shown in Appendix A. Typical universes in the CTPP are Persons, Households
and Workers. In addition, the evaluation must be of existing or near term conditions.
It is not possible to use the CTPP to directly analyze travel modes that do not currently
exist in the study area, or to analyze future year estimates of travel conditions. For
example, it is possible to analyze existing commuter bus service because commuters are

73


1990 CTPP TABLE OUTLINES

Statewide Element

Part A-Tabulations by Area of Residence

Note: A colon(:) after an entry below indicates that the entry is a heading, not a data cell. The heading is a
modifier or descriptor of the categories indented beneath it, but no data are associated with the heading line.

1990 1980
Table Table

Title

Total number
of data cells

A-1. N/A

A-2. N/A

A-3. N/A

A-4. NIA

A-6. 1-3

TOTAL PERSONS(1) 20... sec eec cece eee eer eee eeeeaennees

Universe: Persons
Total

UNWEIGHTED SAMPLE COUNT OF PERSONS(1) .......-.+-005

Universe: Persons
Total

PERCENT OF PERSONS IN SAMPLE(1) .........eeseeereeeee

Universe: Persons
Total

TOTAL HOUSEHOLDS(1) 0.0... cece eee cece eee eee neeeeee

Universe: Households
Total

HISPANIC ORIGIN(3) BY RACE(4) «0.0.0... cee cece eect eee

Universe: Persons
Total, Hispanic origin:
All races
White
Black
Other
Not of Hispanic origin:
(Repeat RACE)
Hispanic origin:
(Repeat RACE)

SEX(3) BY AGE(12) 00.6... eee e cece cece cnet eee ene ee

Universe: Persons
Both sexes:
All ages
Under 16 years
16 and 17 years
18 to 20 years
21 to 24 years
25 to 34 years
35 to 44 years
45 to 54 years
55 to 61 years

1990 CTPP TABLE OUTLINES—Part A March 15, 1993

Page A-1


INTRODUCTION

The purpose of this handbook is to provide an instructional guide to the 1990 Census
Transportation Planning Package (CTPP) and its potential uses for transportation planners
and others involved in Census data analyses. The CTPP is the largest national sample
of commuter travel characteristics available, and contains social and economic data for
both the Place of Residence and Place of Work. This handbook is designed to
complement other efforts by the Census Bureau and the U.S. Department of
Transportation to provide training and guidance on the uses of the CTPP. Several other
agencies and organizations have supported the development of the CTPP and related
products, including the National Association of Regional Councils (NARC), the American
Association of State Highway and Transportation Officials (AASHTO) and individual State
Departments of Transportation.

A brochure and video have been prepared that are designed primarily for those
managers and officials who would like to find out more about the CTPP and its uses. The
focus of these products is to indicate the many ways in which CTPP tabulations can be
used in transportation planning applications. This handbook differs from the brochure and
video in that it is intended to provide a self-instructional guide to planners and technical
analysts who use the CTPP. Two case studies (Travel Demand Characteristics by Urban
Area Size and Assessing Commuter Bus Service), are contained in this handbook to
provide insight into the practical applications of the data.

Organization of the Handbook

This handbook is primarily intended for technical staff members who elect to find out
more detailed information about the CTPP and its applications and those who could not
attend the three-day workshops sponsored by the Federal Highway Administration
(FHWA) and National Highway Institute (NHI) from 1992 to 1994. This handbook
summarizes the content and substance of those workshops, including potential CTPP
applications.

Chapter 1 of the handbook gives an Overview of the 1990 CTPP, with an explanation
of key Census terms, and identifies special features that differentiate it from other Census
products. Chapter 2 discusses the CTPP organization and the geographic levels at which
the data are summarized. Guidelines are provided about how to prepare for analysis using
the CTPP. The chapter contains the two case studies. A series of spreadsheet templates
are provided with the case studies to show how the data can be used in various kinds of
analyses. Chapter 3 indicates the types of checks that you will want to make on CTPP
tabulations as you review the data, including some considerations to make before using
the CTPP for travel demand forecasting and direct analysis. The chapter also briefly
introduces the Windows-based TransVU software that has been distributed by the U.S.
DOT's Bureau of Transportation Statistics (BTS) and the Census Bureau to extract the
information needed from the rather large CTPP tabulations contained on CD-ROM.
Finally, the Appendices contain additional background information on the available CTPP
tables and Census questionnaire.


1990 1980 Total number
Table__Table Title of data cells

B-9. N/A NUMBER OF HOURS WORKED LAST WEEK(6) BY MEANS OF TRANSPORTATION
TOWORK(11) 06 ccc e eee n nnn nnn een teen eens 66
Universe: Workers 16 years and over
Total, number of hours worked last week:

All means of transportation

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

Worked at home
Less than 15 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)
15 to 20 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)
21 to 34 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)
35 to 40 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)
Over 40 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)

B-10. 111-4 | EARNINGS OF WORKERS(12) BY MEANS OF TRANSPORTATION(11) ....-.-.-+++ 132
Universe: Workers 16 years and over
With earnings:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
Less than $5,000 or loss:
(Repeat MEANS OF TRANSPORTATION)
$5,000 to $9,999:
(Repeat MEANS OF TRANSPORTATION)
$10,000 to $14,999:
(Repeat MEANS OF TRANSPORTATION)
$15,000 to $19,999:
(Repeat MEANS OF TRANSPORTATION)
$20,000 to $24,999:

1990 CTPP TABLE OUTLINES-Part B February 1, 1993 Page B-5


APPENDIX A

1990 CENSUS TRANSPORTATION PLANNING PACKAGE

TABLE OUTLINES
STATEWIDE ELEMENT
PARTS A, B and C
and
URBAN ELEMENT

PARTS 1, 2 AND 3



vot OF Coy,

£
f Ww %

: Ver:
ers
U.S. DEPARTMENT OF COMMERCE
Technology Administration

Notional Technical Information Service
Springfield, VA 22161 (703) 605-6000



1990 CTPP TABLE OUTLINES

Statewide Element
Part B-Tabulations by Area of Work

Note: A colon(:) after an entry below indicates that the entry is a heading, not a data cell. The heading is a

modifier or descriptor of the categories indented beneath it, but no data are associated with the heading line.

1990 1980 Total number
Table Table Title of data cells
B-1. I1l-7 HISPANIC ORIGIN(3) BY RACE(4) BY MEANS OF TRANSPORTATION

TO WORK(11) occ ccc cece e center eee e renee nent e nent e ene e een neee 132

Universe: Workers 16 years and over
Total, Hispanic origin:
All races:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
White:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Black:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Other:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Not of Hispanic origin:
(Repeat RACE By MEANS OF TRANSPORTATION TO WORK)
Hispanic origin:
(Repeat RACE By MEANS OF TRANSPORTATION TO WORK)

B-2. IIl-1 | SEX(3) BY OCCUPATION(15) OF WORKERS ........... cece cere cece e renee
Universe: Workers 16 years and over
Both sexes:
All occupations
Executive, administrative, and managerial occupations (000-042)
Professional specialty occupations (043-202)
Technicians and related support occupations (203-242)
Sales occupations (243-302)
Administrative support occupations, including clerical (303-402)
Private household occupations (403-412)
Protective service occupations (413-432)
Service occupations, except protective and household (433-472)
Farming, forestry, and fishing occupations (473-502)

1990 CTPP TABLE OUTLINES—Part B February 1, 1993 Page B-1


1990 1980
Table Table

A-26. |-7

A-27. 1-8

Total number

Title of data cells

SEX(3) BY CLASS OF WORKER(8) FOR WORKERS .......... sees
Universe: Workers 16 years and over
Both sexes:

Technicians and related support occupations (203-242)

Sales occupations (243-302)

Administrative support occupations, including clerical (303-402)
Private household occupations (403-412)

Protective service occupations (413-432)

Service occupations, except protective and household (433-472)
Farming, forestry, and fishing occupations (473-502)
Precision production, craft, and repair occupations (503-702)
Machine operators, assemblers, and inspectors (703-802)
Transportation and material moving occupations (803-863)
Handlers, equipment cleaners, helpers, and laborers (864-902)
Armed Forces

Male:

(Repeat OCCUPATION)

Female:

(Repeat OCCUPATION)

SEX(3) BY INDUSTRY(19) FOR WORKERS ............000eee ee eee eeeeeees 57
Universe: Workers 16 years and over
Both sexes:

All industries

Agriculture, forestry, and fisheries (000-039)
Mining (040-059)

Construction (060-099)

Manufacturing, nondurable goods (100-229)
Manufacturing, durable goods (230-399)
Transportation (400-439)

Communications and other public utilities (440-499)
Wholesale trade (500-579)

Retail trade (580-699)

Finance, insurance, and real estate (700-720)
Business and repair services (721-760)

Personal services (761-799)

Entertainment and recreation services (800-811)
Health services (812-840)

Educational services (842-860)

Other professional and related services (841, 861-899)
Public administration (900-939)

Armed Forces (940-960)

Male:

(Repeat INDUSTRY)

Female:

(Repeat INDUSTRY)

Total, class of worker
Private for profit wage and salary workers
Private not-for-profit wage and salary workers

1990 CTPP TABLE OUTLINES-Part A March 15, 1993 Page A-10




Page 8

Please make sure you have...
1. FILLED this form completely.
2. ANSWERED Question 1a on page 1.
3. ANSWERED Questions 2 through 7 for each person you
listed in Question la.
4. ANSWERED Questions H1a through H26 on pages 3, 4, and 5.

5. ANSWERED the questions on pages 6 through 19 for
each person you listed in Question la.

Also...

6. PRINT here the name of a household member who filled the
form, the date the form was completed, and the telephone
number at which a person in this household can be called.

Da Tate 7
1 ‘ 1
1 L 1
fe a a el
Tw Tv 1
"Telephone i Arencode | Number H © Dy i
[number ————» | 1 H © Night '
_____-- L-W----L-------+-+--------4----------+

7. FOLD the form the way it was sent to you.

8. MAIL it back by April 1, or as close to that date as
possible, in the envelope provided; no stamp is needed.
When you insert your completed questionnaire, please
make sure that the address of the U.S. Census Office can be
seen through the window on the front of the envelope.

NOTE -— If you have listed more than 7 persons in Question la,
please make sure that you have filled the form for the first 7
people. Then mail back this form. A census taker will call to
obtain the information for the other people.

Thank you very much.

|#US. GOVERNMENT PRINTING OFFICE: 1969--200-208


CASE STUDY: ASSESSING COMMUTER BUS SERVICE
Steps 4.1 through 4.6

After responding to all menu prompts (menu help) or entering all Step 4 equations, the
screen should look like this:

A201: (W34] ‘MODE SHARES AND TRAVEL TIMES MENU
Step 4.1 Step 4.2 Step 4.3 Step 4.4 Step 4.5 Step 4.6 Menu
Calculate non-transit travel share

A 8 c D —
201 MODE SHARES AND TRAVEL TIMES
202
203 Trips between CBO and:
204
205 Tevishd Trvishd Trvishd
206 1 2 3
27 teat eee tenet ee ee eee
208 MODE SHARES
209 Percent Vehicle Trips 89.6% 82.7% 81.3%
210 Percent Transit Trips 10.4% 17.3% 18.7%
21

212 TRAVEL TIMES by MOOE

213 Average Vehicle Commuting Time (minutes) 39.0 36.0 34.0
214 Average Transit Commuting Time (minutes) 51.0 45.0 40.0
215 —- Transit/Vehicle Travel Time Ratio 1.31 1.25 1.18
216

217

218

219

220

56


CASE STUDY: ASSESSING COMMUTER BUS SERVICE

3.2 Download J-T-W travel times between each travel shed and the CBD from
the CTPP. When aggregating TAZs into travel sheds, travel time averages
are needed rather than totals. The Lotus 1-2-3 templates provide simple
averages. You could develop weighted averages by combining travel times
with trips.

Downloading and averaging travel times have been done, these are stored in worksheet
file JTW-TIME.WK1. Select Step 3.2 from the menu and respond to prompts. When the
menu reappears, the screen should look like this:

AGI: (W34) MENU
Step 3.1 Step 3.2 Step 3.3 Step 4 Step 5 Step 6 Quit CS Menus
Import JTW-Trip spreadsheet
A B c ° E
61° CTPP TABLE
62 Mean Travel Time of Nonhome Workers, by Detailed Means of Trans., by Tot
63 Number of Cells = 20*2=40

6 Travel time to CBD from:
65 Import area(s) (goto AA1 for Table Summary)
66 T-Shed T-Shed T-Shed
67 Strat Strat2 1 2 3
63
69 Total Total 42 39 35
70 Orive Alone Total 39 36 34
71 2 Worker Vehicle Poot Total 39 36 34
72 3 Worker Vehicle Pool Total 39 36 4
73 4 Worker Vehicle Pool Total 39 36 34
74 5 Worker Vehicle Poot Total 39 36 34
75 6 Worker Vehicle Pool Total 39 36 34
76 7-9 Worker Vehicle Pool Total 39 36 36
7? 10+ Worker Vehicle Pool Total 39 36 34
78 Bus/trolley bus Total 51 45 40
79 Street car/trolley car Total 0 0 i)
80 Railroad Total 0 0 t)
CMD

52


The tables then define the population by each of the cross-tabulation categories. In this
particular example, if the analyst needed to find out the total number of males between the
ages of 21 and 24, it is provided within the table.

Another dimension to all of the tables is the geographic summary level. In Exhibit
2-3, the summary level could be TAZs or counties, depending on whether you are in the
Urban Element (Table 1-6) or the Statewide Element (Table A-6). A table that describes
the population by sex and age will be available within the CTPP’s Urban Element for every
TAZ within the urban area. Similarly, for all places and counties, a separate CTPP table
is provided in the Statewide Element that defines persons by these same characteristics
of sex and age. Finally, the example shows the source of the information. In this example,
Question No. 3 on the Census short form provides information about gender. Age
categories are developed from responses to Question 5A on the Census short form. To
make the connection between CTPP tabulations and the questionnaire used to collect the
information, both the Census short and long forms are provided in the Appendix of this
handbook.

Exhibit 2-4 provides
another example of a CTPP
tabulation. For _ this
example, the universe is

EXAMPLE TABULATION

Table C-1 (3-1) Time Leaving Home to Work -
Total and Peak Period by Means of Transportation

to Work workers who did not work at
= home (the Census counts
Fa
ese workers only 16 years of
SEP age or older), with the
SP o8s ; cross-tabulation _vari-
eee c3 Cross-Tabulation #2
& ge Means of Tassportion ables being means _of
ef transportation (travel mode)
Cros-Tabulaton #1 | and the time leaving home
feorar aad avers = stone to_go to work (by total and
Wears Wh Did Nor Work = Hom peak period). This table
will provide the total
number of workers, as well
as how many traveled by
various means of transpor-
tation, including  single-
NOTE: ‘Total/Peak derived and classified from time of

departure data occupant automobiles, car-
pools and transit. The
table will provide the infor-
mation for the total day and
for the Census defined AM
peak period (6:30 a.m. to
Exhibit 2-4 8:29 a.m.)

14


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE

GRAPH AND SUMMARIZE RELATIONSHIPS

Questions to be answered:

Step 6.4 1.

10.

What is the general relationship between trip rates and population as
illustrated by the scatterplot?

What is the R? for trip rates and population?

Does the scatterplot indicate a strong relationship between travel
times and population?

What is the R? for daily travel times and population?

Does the scatterplot indicate a strong relationship between vehicle
occupancies and population?

What is the R? for vehicle occupancies and population? Is it lower
than expected after reviewing the scatterplot and, if so, why?

Are groupings of the mode split data points evident? What may have
caused these groupings?

What is the R? for mode split and population?

Is there a strong relationship between peak hour percentages and
population? Are groupings evident?

What is the R?for peak hour percentages and population?

43


ASSESSING THE EFFECTIVENESS OF COMMUTER BUS SERVICE

PREPARING FOR ANALYSIS:

1.

The city council has asked about the effectiveness of commuter bus service. What
is the universe in the CTPP that would provide data for this analysis?

What would be the most useful geographic summary level for this analysis?

What types of information will be needed up front before using the CTPP?

What information about commuter bus service would help to find solutions for the
city council?

Turn now to the Appendix. What CTPP tables would be most helpful in doing this
analysis?

47


CTPP tables and export the data into spreadsheet format, as well as perform various types
of analyses by selecting elements of the data in which you are most interested. For
example, TransVU allows you to search for those counties or cities (if any) in which the
total number of households with two or more workers and having no vehicles available
exceeds 1,000. You can obtain a copy of TransVU by calling the transportation data
center for your state or the Bureau of Transportation Statistics at 1-202-366-DATA. An
updated version of TransVU for the CTPP Urban Element is under development and will
be released in the future.

BTS Technical Assistance

U.S. DOT has contracted with JHK & Associates to provide additional technical
assistance for the CTPP Urban Element. The technical assistance available covers
transportation planning applications of Urban Element data. You may contact JHK directly
at (407) 422-8813, to obtain more information about this program.

CTPP Telephone Assistance and Electronic Bulletin Board System

The Census Bureau and U.S. DOT have joined to create an Electronic Bulletin
Board System (EBB) to answer questions about CTPP availability and applications, and
to serve as a message and file transfer system. Staff are available during normal business
hours to field questions and provide information about the CTPP at (301) 457-2454.
Callers may leave a message after hours.

Those who have access to a computer and modem may call the Census Bureau
EBB at (301) 763-7554. It provides users with an opportunity to correspond with U.S.
DOT and Census Bureau technical staff and others about the applications of the CTPP.
The EBB also allows users to upload and download files for use in processing or analyzing
Census data. A menu system is provided to navigate through the system into different
message and file areas with instructions provided for file transfers. There are also a
number of software programs available that allow you to access the CTPP tables. The
EBB is an excellent resource for posting questions and answers about the CTPP and other
Census products, or software packages that can be purchased to extract CTPP data.
Several files are available for downloading from the EBB, including SAS code for CTPP
data processing, and a list of MPO and state DOT contacts for distribution of CTPP
packages.

For more information about these and other CTPP services, contact the FHWA
Planning Support Branch at (202) 366-0182.

76


1990 1980
Table Table

Total number
Title —of data cells

1-49. N/A

1-50. N/A

1-51. N/A

1-52. N/A

PERSONS IN HOUSEHOLD(5) BY WORKERS IN HOUSEHOLD(5) FOR WORKERS .... 25
Universe: Workers 16 years and over in households
Total, persons in household:
All workers in households
Workers in 1-worker household
Workers in 2-worker household
Workers in 3-worker household
Workers in 4-or-more-worker household
1 person in household:
(Repeat WORKERS IN HOUSEHOLD)
2 persons in household:
(Repeat WORKERS IN HOUSEHOLD)
3 persons in household:
(Repeat WORKERS IN HOUSEHOLD)
4 or more persons in household:
(Repeat WORKERS IN HOUSEHOLD)

WORKERS IN GROUP QUARTERS(1) «0.0... 000 cece esc e cece cece ence enaenens 1
Universe: Workers 16 years and over in group quarters
Total

MEANS OF TRANSPORTATION TO WORK(11) FOR WORKERS IN GROUP QUARTERS... 1 1
Universe: Workers 16 years and over in group quarters
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means
Worked at home

MEDIAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(19) ....... 0 ccc cece cece eect erence tee eeeceeeeenenees 19
Universe: Workers 16 years and over who did not work at home
Total

Drove alone

In 2-person carpool

In 8-person carpoo!

In 4-person carpool

in 5-person carpool

In 6-person carpool

In 7-to-9-person carpool

In 10-or-more-person carpool

Bus or trolley bus

Streetcar or trolley car

Subway or elevated

1990 CTPP TABLE OUTLINES~Part 1 August 5, 1993 Page 1-20


1990 1980

1-32. N/A

1-33. 1-23

Total number
of data cells

7:00 p.m. to 7:59 p.m.
8:00 p.m. to 8:59 p.m.
9:00 p.m. to 9:59 p.m.
10:00 p.m. to 10:59 p.m.
11:00 p.m. to 11:59 p.m.
12:00 a.m. to 4:59 a.m.

NUMBER OF HOURS WORKED LAST WEEK(6) BY MEANS OF TRANSPORTATION
TO WORK(11) oo. cece ccc ccc ence cece e cece eee e een e een e eee e ee eenene 66
Universe: Workers 16 years and over
Total, number of hours worked last week:

All means of transportation

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

Worked at home
Less than 15 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)
15 to 20 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)
21 to 34 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)
35 to 40 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)
Over 40 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)

EARNINGS OF WORKERS(12) BY MEANS OF TRANSPORTATION(11) ......+-- 05+ 132
Universe: Workers 16 years and over
With earnings:
All means of transportation
Drove alone
in 2-person carpool
in 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
Less than $5,000 or loss:
(Repeat MEANS OF TRANSPORTATION)
$5,000 to $9,999:

1990 CTPP TABLE OUTLINES—Part 1 August 5, 1993 Page 1-13


CHAPTER 2
ORGANIZATION OF THE CTPP

Introduction

The CTPP tables are organized into a series of parts contained within two elements.
The elements define the geographic summary level. The parts define whether the tables
are summarizing information by Place of Residence, Place of Work or Journey-to-Work.
This chapter describes what is included in each of the two elements, and in the several
parts contained within these elements.

CTPP Elements

As noted above, the CTPP is divided into two elements: the Statewide Element and
the Urban Element. The Statewide Element provides data summaries for all places of
2,500 or more population, the balance of the county (non-incorporated county totals), the
county as a whole, and the entirety of the state. Note that "places" are incorporated
municipalities or Census-defined places (a listing of all incorporated or Census-defined
places is available from the Census Bureau). The 1990 CTPP represents the first time that
a Statewide Element has been created, allowing planners to analyze travel across a wide
geographic range. In previous years, only an urbanized area package was created. This
traditional urbanized area package is what constitutes the Urban Element in the 1990
CTPP. The Urban Element provides data summaries for urbanized areas with a population
of 50,000 or more, and provides information at the Census tract or the TAZ level.

The Statewide Element is used to identify travel characteristics for cities with
different sizes and economies. For example, the Statewide Element makes it relatively
easy to identify the mode share for transit work trips as a percentage of total JTW travel
within a city because travel characteristics information is reported as a total for the place,
the county or the state. The Statewide Element could also be used to identify work trip
rates per household for each place. The Urban Element, on the other hand, would be
most appropriate when looking at the travel mode share within a corridor that connects an
outlying suburb with a major employment center. This is because data contained in the
Urban Element are summarized at a finer level of detail (e.g., TAZs).

Statewide Element

Exhibit 2-1 illustrates the summaries that are available in the Statewide Element
(i.e., Place of Residence, Place of Work and Journey-to-Work). The exhibit shows that
totals are provided by Place (e.g., a city or township) and for the balance of the county,
each county overall, and for the state as a whole. The arrows show the JTW flows
reported in the Statewide Element. The CTPP provides information on worker travel flows

g Preceding page blank


1990 1980 Total number
Table__Table __Title of data cells

1-36. N/A TIME LEAVING HOME TO GO TO WORK(7) BY MEANS OF TRANSPORTATION(10) ... 70
Universe: Workers 16 years and over who did not work at home
Total, time leaving home to go to work:

All workers who did not work at home

Drove alone

In 2-person carpool

in 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means
5:30 a.m. to 6:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
6:30 a.m. to 7:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
7:30 a.m. to 8:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
8:30 a.m. to 9:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
9:30 a.m. to 10:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
10:30 a.m, to 5:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)

1-37. N/A MEANS OF TRANSPORTATION TO WORK(10) BY TRAVEL TIME TO WORK(16) .... . 160
Universe: Workers 16 years and over who did not work at home
Workers who did not work at home:

All travel times
Less than 5 minutes
5 to 9 minutes
10 to 14 minutes
15 to 19 minutes
20 to 24 minutes
25 to 29 minutes
30 to 34 minutes
35 to 39 minutes
40 to 44 minutes
45 to 49 minutes
50 to 54 minutes
55 to 59 minutes
60 to 74 minutes
75 to 89 minutes
90 minutes or more
Drove alone:
(Repeat TRAVEL TIME TO WORK)
In 2-person carpool:
(Repeat TRAVEL TIME TO WORK)
In 3-person carpool:

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993 Page 1-15


CASE STUDY: ASSESSING COMMUTER BUS SERVICE

Step 3 Identify J-T-W trips and travel times from each travel shed to the CBD

3.1. Download worker flow data from the CTPP. Use the equivalency list (Step
2.2) to aggregate TAZ data to travel shed totals. The Lotus 1-2-3 template
is designed to help with this step of the case study.

Downloading and aggregating J-T-W trips to travel shed totals have been done and stored
in worksheet file JTW-TRIP.WK1. Select Step 3.1 from the CS-4-2.WK1 menu and
respond to prompts. When the menu reappears, the screen should look like this:

Al: (W34] ‘CTPP TABLE C-1 or 3-1 MENU
Step 3.1 Step 3.2 Step 3.3 Step 4 Step 5 Step 6 Quit CS Menus
Import JTW-Trip spreadsheet

A B c D —
1 CTPP TABLE C-1 or 3-1
2 Nonhome Workers by Detailed Means of Transportation by Total/Peak Period
3 Humber of Cells = 20*2=40
4 Trips to CBD from:
5 Import area(s) (goto AA1 for Table Summary)
6 T-Shed T-Shed T-Shed
7 Stratt Strat2 1 2 3
8
9 Total Total 463 1337 4535
10 Orive Alone Total 371 969 3215
11 2 Worker Vehicle Poot Total 30 86 291
12 3 Worker Vehicle Pool Total 9 38 136
13 4 Worker Vehicle Pool Total 5 13 45
146 5 Worker Vehicle Pool Total tv) ) 0
15 6 Worker Vehicle Poot Total 0 to) 0
16 7-9 Worker Vehicle Pool Total 0 0 0
17 10+ Worker Vehicle Poot Total 0 0 0
18 Bus/trolley bus Total 48 231 848
19 Street car/trolley car Total t) 0 oO
20 Railroad Total 0 0 Qo

‘CHD

51






In 7-to-9-person carpool
In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad
Ferryboat
Taxicab
Motorcycle
Bicycle
Walked
Other means
Peak period (6:30 a.m. to 8:29 a.m.):
(Repeat MEANS OF TRANSPORTATION)

TOTAL NUMBER OF DATA CELLS IN PART 3: 122

PART 3 RECORD SELECTION CRITERIA: All workers who Ilve In the CTPP region
regardless of where they work, and all workers
who work In the CTPP reglon regardless of where
they live.

1990 CTPP TABLE OUTLINES-Part 3 August 5, 1993 Page 3-3


CASE STUDY: ASSESSING COMMUTER BUS SERVICE (continued)

Step 5

Step 6

1.

ON>

Regression analysis provides a statistically accurate picture of the
data, and identifies whether a relationship is likely to be true based
on the variables.

Independent variable = travel time ratio

Dependent variable = mode share

R? = .70; moderately strong

Use the regression equation parameters multiplied by the travel time
ratio to estimate ridership.

Add the estimated transit percentage to the standard error for the
upper limit, subtract for the lower limit.

Routes 11, 12, 2

Routes 7 and 4
Frequency of bus service, location of stops (walk distance), etc.

68


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE

OBJECTIVE: This Case Study provides an understanding of how the Statewide
Element of the CTPP can help define or check parameters used for
travel demand modeling. It is Case Study No. 5 on the diskette
provided.

MATERIALS PROVIDED:

Lotus Template Files
© CS-5-1A.WK1

@ CS-5-1B.WK1
@ CS-5-1C.WK1
@ CS-5-1D.WK1

OVERVIEW OF CASE STUDY STEPS:

Exhibit CS-A-1 provides a visual case study overview, and on page 25, a narrative
introduction is given. You are also asked on that page to prepare for analysis and the
case study steps by answering a few questions. On page 26, the steps begin, starting with
Step 1 and setting up the problem. Answer the questions for Step 1, then turn the page
to answer questions for Step 2, and so on until all questions are answered. Steps 2
through 6 require the use of the spreadsheets listed above. To use the spreadsheets,
either select Case Study 5 (as it is named on the diskette) from the Case Study Menu (CS-
MENU.WK1) or retrieve file CS-5-1A.WK1 into a blank spreadsheet. Menus and prompts
are provided for assistance. You must complete each and every step sequentially. If you
miss a step in the spreadsheets, return to the Case Study Main Menu and start over. It is
relatively easy to retrace your steps.

NOTE: This Case Study uses a conversion factor of 1.81 to convert Census JTW data into Home-
based Work (HBW) trips for use in travel demand forecasting models. The details of developing this
conversion factor are covered in the CTPP training course (and are included in case study 3 on the
diskette provided with this handbook). The conversion factor is close to 2.0 because the JTW trips
must be doubled to account for the trip from work to home. However, because of trip chaining,
mode shift and other locally-derived factors, it is not accurate simply to double the JTW trips
reported in the CTPP. FHWA is in the process of identifying conversion factors for different sized
urban areas. Contact CTPP Telephone Assistance or call FHWA to obtain further information about
this effort; telephone numbers are included in Chapter 3.

23 Preceding page blank


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE

Step 3.2

Step 3.3

Step 4.1

Step 4.2

Step 5

Step 6.4

Other
Questions

Ok ONS

[ay =

OaARWON>

1.
2.

(Continued)

Bus/trolley bus, streetcar/trolley car, railroad, subway/elevated, ferry,
taxi, motorcycle, bicycle, walked, worked at home, other.
2,987

Subtract non-vehicle JTW trips from total JTW trips.
0.9 percent

Workers 16 years and over who did not work at home

6:30 AM to 8:29 AM

A-31, Time Leaving Home to Go to Work; A-57; and B-18, Time of
Arrival at Work by Means of Transportation

463,947

River City

Mean (or median) travel time. Median should be used when outliers
(or unusually high or low data points) are likely to skew the results.
Actual travel times tend to be longer than perceived travel times, in
part because some Census long. form respondents may have
identified in vehicle travel times rather than door-to-door travel times.
Daily = 11.7, Peak = 13.3

Trip rates decrease as population increases.

988

Yes

895

No

(a) .191

(b) Yes. Two outliers tend to diffuse the scatterplot, making the
relationship weaker

Yes. There may be “cut off’ points in cities of this size for transit
service.

924

Yes

851

Compare vehicle occupancy factors, mode split and other travel
demand parameters for reasonableness based on population.
In most cases, yes.

66


1-58. N/A TOTAL HOUSING UNITS(1)
Universe: Housing units
Total

1-59. N/A UNWEIGHTED SAMPLE COUNT OF HOUSING UNITS(1) ..... 0... c ese e cece eens 1
Universe: Housing units
Total

1-60. N/A PERCENT OF HOUSING UNITS IN SAMPLE(1)
Universe: Housing units
Total

1-61. N/A VACANCY STATUS(5) 0... cece ect e cece eee e cece eee eee e eee e nner en eee 5
Universe: Vacant housing units
Total
For rent
For sale only
For seasonal, recreational, or occasional use
All other vacants

1-62.1-13 | OCCUPANCY STATUS(3) BY UNITS INSTRUCTURE(7) ..........0 ccc ee eee nee 21
Universe: Housing units
Total, occupancy status:
Total, units in structure
1 unit, detached
1 unit, attached
2 to 4 units
5 or more units
Mobile home or trailer
Other
Occupied:
(Repeat UNITS IN STRUCTURE)
Vacant:
(Repeat UNITS IN STRUCTURE)

1-63. N/A AGGREGATE VEHICLES AVAILABLE(1) 6.0... 0. eee cece cece cence ee en ee ees 1

Universe: Occupied housing units
Total

TOTAL NUMBER OF DATA CELLS IN PART 1: 2,481

PART 1 RECORD SELECTION CRITERIA: All persons, households, and workers who live in
the CTPP region, and all housing units located In
the CTPP region.

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993 Page 1-24


CASE STUDY: ASSESSING COMMUTER BUS SERVICE

5.1 The percentage of transit trips is calculated by subtracting the percentage
of vehicle trips from one.

5.2 The regression relationship between travel time and mode share is based
on the following equation:

% Transit (dependent variable) = Travel Time Ratio (independent variable) * X coefficient
+ Constant

he Regression Output from Step 5.2 Should Look Like This:

B241: (WO) Press Enter for menu
8 c o E F G H 1

241

262 Regression Output:

243 Constant 0.834808

244 Std Err of Y Est 0.044381

245 R Squared 0.701229

246 No. of Observations 19

247 Degrees of Freedom 7

268

249 X Coefficient(s) -0.56902
250 Std Err of Coef. 0.090084
251
252
253
254
255
256
257
258
259
260
CHD

59


summary available by Census Tract. This part is intended primarily for non-transportation
users who would like to get Census information by typical Census geography.

Detailed specifications for the CTPP parts and tables by Element are provided in
Appendix A. Each table is defined by its universe (the unit of measurement) and one or
more cross-tabulation variables. Each of the cross-tabulation variables is defined by
discreet categories. Both the Census short form and long form are provided in Appendix
B. Most of the information for the CTPP is developed from questions on the Census long
form. The long form was completed by about one in six households in the country, with
a sampling rate that varied by the type of area. Rural areas had up to a one in two
sampling rate, whereas urban areas had as low as a one in 20 sampling rate due to the
varying likelihood of homogeneity among socio-economic and travel characteristics in
different communities.

16


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE

PERCENTAGE OF PEAK PERIOD TRIPS

4. Determine the Percentage of Daily JTW
Trips Occurring in the Peak Period by
Urban Area

CTPP Table(s,

4.1 Download Daily and Peak
Period JTW Trips

4.2 Calculate Percentage of Daily
JTW Trips Occurring in Peak Period

6. Identify Relationship Between 7 Balancing and
| Peak Period Percentage and Assignment
Urban Area Size | Models

Questions to be answered:

Step 4.1

Step 4.2

1.

What is the universe of the CTPP Table you used to determine daily
and peak JTW trips?

How is the peak period defined in Table C-1?

What tables could you use to determine peak hour JTW trips from the
CTPP?

How many peak period JTW trips are generated a day in River City?

What city has the highest percentage of peak period trips?

33


1990 1980
Table Table.

Total number
Title of data cells

2-23. N/A

2-24. N/A

Streetcar or trolley car
Subway or elevated
Railroad

Ferryboat

Taxicab

Motorcycle

Bicycle

Walked

Other means

MEAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(19) 00.0.0. e cece cece teen n ete eee terete nen ee ee eras 19
Universe: Workers 16 years and over who did not work at home
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-person carpool

In 5-person carpool

In 6-person carpool

In 7-to-9-person carpool

In 10-or-more-person carpool

Bus or trolley bus

Streetcar or trolley car

Subway or elevated

Railroad

Ferryboat

Taxicab

Motorcycle

Bicycle

Walked

Other means

STANDARD DEVIATION OF TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(19) 2.0.00 s eee e cece e ee erent eee e eee tent n eee eeneees 19
Universe: Workers 16 years and over who did not work at home

Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-person carpool

In 5-person carpool

In 6-person carpool

In 7-to-9-person carpool

1990 CTPP TABLE OUTLINES-Part 2 August 5, 1993 Page 2-11


CASE STUDY: ASSESSING COMMUTER BUS SERVICE

3.3 Use downloaded JTW trips and travel times to calculate total travel time.
Select Step 3.3 from the menu and press M to complete Step 3.3 with the
help of menus or any other key to complete Step 3.3 without menu help. The
following formula calculates total travel time in hours:

Trips * Travel Time / 60

The dividend of 60 converts travel times (reported in minutes) into hours.

After completing Step 3.3, the screen should look like this:

C129: (F1) #TOTAL*C69/60 MENU
Step 3.1 Step 3.2 Step 3.3 Step 4 Step 5 Step 6 Quit CS Menus
Import JTW-Trip spreadsheet
A 8 c o E
121 TOTAL PERSON HOURS TRAVELED
122 (Trips * Travel Time / 60)

123

124 Travel hours to CBD from:
125

126 T-Shed T-Shed T-Shed
127 Strat Strate 1 2 3
12B wenn nen n nnn re renee ene n renee news eew ween ener rece n nn nn ne een ence en nen ens
129 Total Total 324.1 869.1 2645.4
130 Drive Alone Total 261.2 © 581.4 = 1821.8
131 2 Worker Vehicle Pool Total 19.5 51.6 164.9
132 3 Worker Vehicle Pool Total 5.9 22.8 77.41
133 4 Worker Vehicle Pool Total 3.3 7.8 25.5
134 5 Worker Vehicle Pool Total 0.0 0.0 0.0
135 6 Worker Vehicle Pool Total 0.0 0.0 0.0
136 7-9 Worker Vehicle Pool Total 0.0 0.0 0.0
137 10+ Worker Vehicle Pool Total 0.0 0.0 0.0
138 Bus/trolley bus Total 40.8 173.3 565.3
139 Street car/trolley car Total 0.0 0.0 0.0
140 Railroad Total 0.0 0.0 0.0

53


Preparing for Analysis Using the CTPP

Questions to be answered:

1.

To help develop a transit plan for the urbanized area, your staff director has asked
you to summarize the age and economic characteristics of those who are employed
in areas not served by public transit. What would you choose as the primary unit
of measure, or universe, in the CTPP?

What other information would you need to assemble before using the CTPP to
assist you in this analysis?

What CTPP Element would you use to provide the information to the staff director?

What Part would contain information about employees by where they live? In what
Part would you find employee characteristics by where they work?

What other cross-tabulations might be helpful in this analysis of workers?

Now turning to the Appendix, which tables would be most appropriate for this
analysis?

Answers appear on the following page.

19


1990 1980
Table Table

Total number
Title of data cells

1-55. N/A

1-56. N/A

Bicycle
Walked
Other means

MEDIAN TRAVEL TIME IN MINUTES(1) BY MEANS OF TRANSPORTATION(10)
BY TIME LEAVING HOME TO GO TOWORK(7) ...... 6c cece cece een e een en ees 70
Universe: Workers 16 years and over who did not work at home
All workers who did not work at home:
All departure times
5:30 a.m. to 6:29 a.m.
6:30 a.m. to 7:29 a.m.
7:30 a.m, to 8:29 a.m.
8:30 a.m. to 9:29 a.m.
9:30 a.m. to 10:29 a.m.
10:30 a.m. to 5:29 a.m.
Drove alone:
(Repeat TIME LEAVING HOME TO GO TO WORK)
In 2-person carpool:
(Repeat TIME LEAVING HOME TO GO TO WORK)
In 3-person carpool:
(Repeat TIME LEAVING HOME TO GO TO WORK)
In 4-or-more-person carpool:
(Repeat TIME LEAVING HOME TO GO TO WORK)
Bus or trolley bus:
(Repeat TIME LEAVING HOME TO GO TO WORK)
Streetcar, trolley car, subway, or elevated:
(Repeat TIME LEAVING HOME TO GO TO WORK)
Railroad:
(Repeat TIME LEAVING HOME TO GO TO WORK)
Bicycle or walked:
(Repeat TIME LEAVING HOME TO GO TO WORK)
Taxicab, ferryboat, motorcycle, or other means:
(Repeat TIME LEAVING HOME TO GO TO WORK)

MEAN TRAVEL TIME IN MINUTES(1) BY MEANS OF TRANSPORTATION(10) BY
TIME LEAVING HOME TO GO TOWORK(7) 0... 0.0 cece eee e cece ence ene eee noes 70
Universe: Workers 16 years and over who did not work at home
All workers who did not work at home:
All departure times
5:30 a.m. to 6:29 a.m.
6:30 a.m. to 7:29 a.m.
7:30 a.m. to 8:29 a.m.
8:30 a.m. to 9:29 a.m.
9:30 a.m. to 10:29 a.m.
10:30 a.m. to 5:29 a.m.
Drove alone:
(Repeat TIME LEAVING HOME TO GO TO WORK)
in 2-person carpool:
(Repeat TIME LEAVING HOME TO GO TO WORK)
In 3-person carpool:

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993 Page 1-22


1990 1980
Table Table

Title

Total number
of data cells

A-21. N/A

A-22. N/A

A-23. N/A

$125,000 to $149,999

$150,000 or more
No vehicles:

(Repeat HOUSEHOLD INCOME)
1 vehicle:

(Repeat HOUSEHOLD INCOME)
2 vehicles:

(Repeat HOUSEHOLD INCOME)
3 vehicles:

(Repeat HOUSEHOLD INCOME)
4 vehicles:

(Repeat HOUSEHOLD INCOME)
5 vehicles:

(Repeat HOUSEHOLD INCOME)
6 vehicles:

(Repeat HOUSEHOLD INCOME)
7 or more vehicles:

(Repeat HOUSEHOLD INCOME)

MEDIAN HOUSEHOLD INCOME IN 1989(1) BY VEHICLES AVAILABLE(9) ......... 9

Universe: Households
Total

No vehicles

1 vehicle

2 vehicles

3 vehicles

4 vehicles

5 vehicles

6 vehicles

7 or more vehicles

MEAN HOUSEHOLD INCOME IN 1989(1) BY VEHICLES AVAILABLE(9) ........-.- 9

Universe: Households
Total

No vehicles

1 vehicle

2 vehicles

3 vehicles

4 vehicles

5 vehicles

6 vehicles

7 or more vehicles

UNITS IN STRUCTURE(7) BY VEHICLES AVAILABLE(9)

Universe: Households
Total, units in structure:
Total, vehicles available
No vehicles
1 vehicle
2 vehicles

1990 CTPP TABLE OUTLINES—Part A

March 15, 1993

Page A-8




CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE
TRANSIT SCATTERPLOT

HBW NON—-VEHICLE TRIPS

(MODE SPLIT)

0.022
0.021

0.02
0.019
0.018
0.017
0.016
0.015
0.014
0.013
0.012
0.011

0.01
0.009
0.008
0.007
0.006
0.005
0.004
0.003

0.002
0.001 puro i9 L n 1 1 1 1 L 1
0 0.2 0.4 0.6 0.8 1
(Millions)
POPULATION

PERCENT NON—VEHICLE TRIPS

Se

Exhibit CS-A-6

40



1990 1980
Table Table

Title

Total number
of data cells

A-9. N/A

A-10. N/A

A-11. 1-1

MOBILITY LIMITATION STATUS(3) BY AGE(11) ...........-5-

Universe: Persons 16 years and over
Total, mobility limitation status:
Persons 16 years and over
16 and 17 years
18 to 20 years
21 to 24 years
25 to 34 years
35 to 44 years
45 to 54 years
55 to 61 years
62 to 64 years
65 to 74 years
75 years and over
With a mobility limitation:
(Repeat AGE)
No mobility limitation:
(Repeat AGE)

MOBILITY LIMITATION STATUS(3) BY EMPLOYMENT STATUS(6)

Universe: Persons 16 years and over
Total, mobility limitation status:
Total, employment status
In labor force:
In Armed Forces
Civilian:
Employed:
At work
Not at work
Unemployed
Not in labor force
With a mobility limitation:
(Repeat EMPLOYMENT STATUS)
No mobility limitation:
(Repeat EMPLOYMENT STATUS)

SEX(8) BY AGE(12) FOR PERSONS IN HOUSEHOLDS ...........

Universe: Persons in households
Both sexes:
All ages
Under 16 years
16 and 17 years
18 to 20 years
21 to 24 years
25 to 34 years
35 to 44 years
45 to 54 years
55 to 61 years
62 to 64 years

1990 CTPP TABLE OUTLINES-Part A March 15, 1993

Page A-3




CASE STUDY: ASSESSING COMMUTER BUS SERVICE

Step 5 Using the results from Step 4, determine statistical relationships between
travel time ratios and mode shares. Results should indicate those travel
sheds where factors other than travel times are causing routes to not attract
a reasonable number of riders. Regression analysis will be used to predict
mode split (% transit trips) based on the existing relationship between mode
split and travel time ratios.

Select Step 5 from the menu. Press M to complete Step 5 with menu help, any other key
to complete Step 5 without menus. The initial Step 5 screen should look like this:

8221: (W9] "T-shPress M for Step S menus -- any other key for Step 5 w/out menus
8 Cc D & F G H I

221° T-shed = % Veh. Ratio % Transit % Est. + -
222 1 89.6% 1.31

223 2 82.7% 1.25

226 3 81.3% 1.18

225 4 99.2% 1.36

226 5 86.2% 1.26

227 6 80.9% 1.13

228 7 93.0% 1.13,

229 8 95.9% 1.44

230 9 93.3% 1.37

231 10 95.9% 1.33

232 an 67.1% 1.00

233 12 82.3% 1.25

234 13 93.0% 1.33

235 4 93.0% 1.29

236 45 97.3% 1.45

237 16 93.1% 1.32

238 17 93.1% 1.31

239 18 93.4% 1.30

240 19 95.9% 1.45

CHD

58


1990 1980

Total number

Table Table Title of data cells

A-12. 1-2

A-13. N/A

A-14. N/A

65 to 74 years

75 years and over
Male:

(Repeat AGE)
Female:

(Repeat AGE)

SEX(3) BY AGE(12) FOR PERSONS IN GROUP QUARTERS .......-- esses ee eeeee 36
Universe: Persons in group quarters
Both sexes:

All ages

Under 16 years

16 and 17 years

18 to 20 years

21 to 24 years

25 to 34 years

35 to 44 years

45 to 54 years

55 to 61 years

62 to 64 years

65 to 74 years

75 years and over
Male:

(Repeat AGE
Female:

(Repeat AGE)

HOUSEHOLD SIZE(5) BY NUMBER OF WORKERS IN HOUSEHOLD(6) ........-++ 30
Universe: Households
All households:

Total, number of workers in household

No workers in household

1 worker in household

2 workers in household

8 workers in household

4 or more workers in household
1-person households:

(Repeat NUMBER OF WORKERS IN HOUSEHOLD)
2-person households:

(Repeat NUMBER OF WORKERS IN HOUSEHOLD)
3-person households:

(Repeat NUMBER OF WORKERS IN HOUSEHOLD)
4-or-more-person person households:

(Repeat NUMBER OF WORKERS IN HOUSEHOLD)

NUMBER OF WORKERS IN HOUSEHOLD(6) BY HOUSEHOLD INCOME IN 1989(26). . .156
Universe: Households
All households:

Total, household income

Less than $5,000

1990 CTPP TABLE OUTLINES-Part A March 15, 1993 Page A-4


1990 1980 Total number
Table Table tle of data cells

{n 7-to-9-person carpool
In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad
Ferryboat
Taxicab
Motorcycle
Bicycle
Walked
Other means
Peak period (6:30 a.m. to 8:29 a.m.):
(Repeat MEANS OF TRANSPORTATION)

TOTAL NUMBER OF DATA CELLS IN PART C: 122

PART C RECORD SELECTION CRITERIA: All workers who live In the State regardless of
where they work, and all workers who work in
the State regardless of where they live.

1990 CTPP TABLE OUTLINES~Part C February 1, 1993 Page C-3


1990

Table_Table

1-7.

1-8.

1980

Title

Total number
of data cells

N/A

35 to 44 years

45 to 54 years

55 to 61 years

62 to 64 years

65 to 74 years

75 years and over
Male:

(Repeat AGE)
Female:

(Repeat AGE)

SEX(3) BY EMPLOYMENT STATUS(6) ....---- ee eeeeeeeees

Universe: Persons 16 years and over
Both sexes:
Total, employment status
In labor force:
In Armed Forces
Civilian:
Employed:
At work
Not at work
Unemployed
Not in labor force
Male:
(Repeat EMPLOYMENT STATUS)
Female:
(Repeat EMPLOYMENT STATUS)

SCHOOL ENROLLMENT(6) BY AGE(8) .......--- sees eee e eee

Universe: Persons 3 years and over
Total, school enrollment:
Persons 3 years and over
3 and 4 years
5 years
6 to 11 years
12 to 17 years
18 to 64 years
65 to 74 years
75 years and over
Enrolled:
In nursery school or kindergarten:
(Repeat AGE)
In grade 1 to 9:
(Repeat AGE)
{n grade 10 to 12:
(Repeat AGE)
In college:
(Repeat AGE)
Not enrolled:

(Repeat AGE)

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993

Page 1-2


AM: [WO] MENU
Step 2.1 Step 2.2 Step 2.3 Review Step 3 Quit CS Menu
Import HHs and J-T-W trips

A B c D E F G a
1 TRIP RATES BY URBAN AREA SIZE
2
3
4 Total JTW to HBW HBW
5 JTW HBW = Person = Trips/
6 City Population Households Trips Factor Trips HH
7 - se eeesweneenenee wteceeeeceeee
8 1 50,000 21,739 32,428 1.81 58,695 2.70
9 2 65,000 29,545 43,787 1.81 79,254 2.68
10 3 150,000 68,182 98,318 1.81 177,956 2.61
W 4 225,000 107,143 149,171 1.81 270,000 2.52
12 5 275,000 125,000 170,235 1.81 308,125 2.47
3 6 550,000 261,905 322,317 1.81 583,394 = 2.23
% 7 675,000 337,500 412,086 = 1.81 745 ,876 2.21
6 8 850,000 472,222 538,098 1.81 973,957 2.06
16 9 950,000 558,824 611,310 1.81 1,106,471 1.98
7
18
19
20

CMD

27


1990 1980
Table Table

Title

Total number
of data calls

2-20. N/A

2-21. N/A

2-22. N/A

Taxicab, ferryboat, motorcycle, or other means:
(Repeat TRAVEL TIME TO WORK)

MEDIAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF

TRANSPORTATION(10) .. 0.0 cee eee cece cence renee nena eens

Universe: Workers 16 years and over who did not work at home
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated
Railroad

Bicycle or walked -

Taxicab, ferryboat, motorcycle, or other means

MEAN TRAVEL TIME TO WORK (IN MINUTES)(1) BY MEANS OF

TRANSPORTATION(10) ......0cc0cceeeeeeeeeeeeeneenee ene

Universe: Workers 16 years and over who did not work at home
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated
Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

MEDIAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF

TRANSPORTATION(19) 0.0.00 s cece eee eee een e ener een ees

Universe: Workers 16 years and over who did not work at home
Total

Drove alone

In 2-person carpool

In 3-person carpool

in 4-person carpool

In 5-person carpool

In 6-person carpool

In 7-to-9-person carpool

In 10-or-more-person carpool
Bus or trolley bus

1990 CTPP TABLE OUTLINES-Part 2 August 5, 1993

Page 2-10


Reproduced from
best available co;

Page 6

PERSON 1 14a. Did this person live in this house or apartment | 18, Does this person have a physical, mental, or other
S years ago (on April 1, 1985)? health condition that has lasted for 6 or moce

a — Goto questo: months and which —

Carrara © Bor ater Apa 1, 1985 pretininaselal ‘a. Limits the kind or amount of work this person can
© Yes — Skip to 150 doata job?
© No © Yes © No

'b, Where did this person live S years ago bb Prevents this person from working at a job?

(on Apeil 1, 1985)? Mo ve © No

9. Is this person a CITIZEN of the United States?
Yes, borin the Unted Sites — Stipto 11 gy
‘Yes, bom in Puerto Rico, Guam, the

U.S. Virgin Islands, or Northern Marianas
Yes, bom abroad of American parent or parents
‘Yes, U.S, cttzen by naturalization

No, not a ctizen of the United States

10. When did this person come to the United States
to stay?
© 1987101990 Mo 197001974
© 1985 or 1986 © 1965 to 1969
© 1982 to 1984 © 1960 to 1964
© 1980 or 1981 O 19500 1959
© 197510 1979 © Before 1950

°
°

000

(1) Name of U.S. State of foreign country

Print

jRane oleountjintbeUS.—7

(G) Name of city or town in the U.S.
pa _

(4) Did this person live inside the city
‘oF town limita?

© Yes

© No, Bved outside the city/town limits

Because of a health condition that has lasted for
6 or more months, does this person have any
difficulty —

18. Golng outside the home alone, for example, to
shop of visit a doctor’s office?

© Yes © No

19.

b. Taking care of his or her own personal needs, such
aa bathing, dressing, or getting around Inside the
home?

© Yes © No

11, At any time since February 1, 1990, has this

school, and schooling which leads to a high achoo! diplorns
or a college degree.
© No, has not attended since February 1
© Yes, public school, public college a
© Yes, private school, private college
12, How much school has this person COMPLETED?
Fill ONE erie forthe highest evel COMPLETED or

‘15a. Does this person speak a language other than
English at home?

© Yes O No— Skip to 16

Hf this person is a female —

20. How many bables hae she ever had, not counting
stillbirths? Do not count her stepchildren or children
she has adopted.

None] 23456789 10 11 120¢more

© 000000000000

¢. How well does this person speak English?
© Verywel O Not well
© Well © Notatal

deggee RECEIVED. H currently. ack the level
of previous grade attended or highest degree received.
No school completed
Nursery school

Kindergarten 7

16, When was this person born?
© Bom before April 1, 1975 ~ Goto 17a
© Born April 1, 1975 or later —~ Go to questions
for the next person

1st, 2nd, Sed, of 4th grade

‘Sth, 6th, 7th, of 8th grade

‘Sth grade

10th grade

1th grade

12th grade, NO DIPLOMA.

HIGH SCHOOL GRADUATE - high school

0000000000

© © C0000

13. What is this person's ancestry or ethnic origin?
(See instruction guide for further Information.) L.

‘17a. Has this person ever been on active-duty military
service in the Armed Forces of the United States
‘or ever been In the United States military Reserves,
or the National Guard? if service was in Reserves or
National Guard only, see instruction guide.

© Yea, now on active duty

(© Yes, on active duty in pat, but not now

©. Yes, service in Reserves or National
Guard only — Skip to 18

© _No— Skip to 18

‘Zia, Did this person work at any time LAST WEEK?

Yes — Fill this cree if this person worked full
time or part ime. (Count part-time work such

duty in the Armed Forces.)
© No— Filthis circle this peron did not wock,
‘or did only own housework, school work, of
a voluntees work, — Skip to 25

». How many hours did this person work LAST WEEK|
(at all Jobs)? Subtract any time off; add overtime or extra|
hourt worked, c

te.

Wl * Addrese (Number and street)

1b. Was active-duty military service during ~
Filla circle for each period in which this person served.

September 1980 or later

May 1975 to August 1980

‘Vietnam era (August 1964— April 1975)
February 1955—July 1964

Korean confit (June 1950—January 1955)
‘World War Il (September 1940—July 1947)

22. At what location did this person work
LAST WEEK?

1 this person worked at more than one location, print
where he or she worked most last week.

H
tae.

Gf the exact address is nt known, give a description of
the location such as the building name or the nearest
‘Steet or intersection.)

World War | (April 1917—1 1918)
Any other time

00000000

¢. In total, how many years of sctive-duty military
service has this person had?

4

{Years

PLEASE ANSWER THESE QUESTION

SeKOFVOARHYO

OHooPVEeNnDE

Saar a

The sa jestionnairé alao contains population questions 8 t6 33,
pl gud Ffevreach person inthe household:

‘sample form {1.0.76 and 7;8 and 9, etc.

nye On pages 6 and 7. These Guestions appear on pal
thet questions ‘

tc 33dor not apply to persons unde



CHAPTER 1

OVERVIEW OF THE CTPP

What is the CTPP?

The 1990 Census Transportation Planning Package (CTPP) is a collection of summary
tables that have been generated from both the 1990 Census short and long forms. The
tables contain information about population and household characteristics, worker
characteristics and characteristics of the Journey-to-Work (JTW). The tables provided in
the CTPP are similar in format and content to those available in other Census products.
It should be noted that the CTPP does not contain raw Census information; rather the
information provided, as with all other Census products, has been organized into a series
of tables. The tables contained in the CTPP cannot be disaggregated; however, they can
be combined to conduct a variety of analyses. In fact, the CTPP tables have been
designed specifically for transportation planning analysis based on extensive input from
transportation professionals representing various agencies from across the country.
However, upon reviewing the available tables, you may note that there are numerous
applications for the CTPP outside transportation planning.

Census Definitions

Before proceeding, it is important to become familiar with the terminology used in the
CTPP and other Census products. The following key terms are used throughout this
handbook and in conjunction with the use of Census data; those marked with an asterisk
are Census-specific:

TM Census Long Form*  - Sampled data collected from about one in six
households (more in rural areas, less in densely
developed urban areas). The long form is the source of
some population and economic data, and all Journey-
to-Work data. (See Appendix.)

TM Census Short Form* = - Used in the 100 percent count of all persons. A source
of total population, race, sex, age, and some housing
data, including type of structure, units in structure and
value of home or monthly rent. (See Appendix.)

@ Geographic Information - An organized collection of computer hardware,
System (GIS) software and geographic data designed to efficiently
capture, store, update, manipulate, analyze and display
all forms of geographically referenced information.

3 Preceding page blank


1990 1980
Table Table

Total number
Title. of data cells

1-42. N/A

1-43. 1-22

1-44. N/A

1-45. 1-24

AGGREGATE NUMBER OF VEHICLES USED IN CARPOOLING(1) .......000eeeeeeee 1
Universe: Workers 16 years and over in a carpool
Toial

WORKERS PER CARPOOL(1) 2.0.0.0. c ccc c ees e cece ence ence teen entrees 1
Universe: Workers 16 years and over in a carpool
Total

MOBILITY LIMITATION STATUS(3) BY MEANS OF TRANSPORTATION TO WORK(11). . 33
Universe: Workers 16 years and over
Total, mobility limitation status:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
With a mobility limitation:
(Repeat MEANS OF TRANSPORTATION)
No mobility limitation:
(Repeat MEANS OF TRANSPORTATION)

HOUSEHOLD INCOME IN 1989(26) BY MEANS OF TRANSPORTATION TO
WORK(11) FOR WORKERS IN HOUSEHOLDS ......... 0c e cece eee ee ence eens 286
Universe: Workers 16 years and over in households
Total, household income for workers in households:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
Less than $5,000:
(Repeat MEANS OF TRANSPORTATION)
$5,000 to $9,999:
(Repeat MEANS OF TRANSPORTATION)
$10,000 to $12,499:
(Repeat MEANS OF TRANSPORTATION)
$12,500 to $14,999:
(Repeat MEANS OF TRANSPORTATION)

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993 Page 1-17


1990 CTPP TABLE OUTLINES

Urban Element
Part 2-Tabulations by Area of Work

Note: A colon(:) after an entry below indicates that the entry is a heading, not a data cell. The heading is a
modifier or descriptor of the categories indented beneath it, but no data are associated with the heading line.

1990 1980 Total number
Table Table Title of data cells
2-1. IIl-7 HISPANIC ORIGIN() BY RACE(4) BY MEANS OF TRANSPORTATION

TO WORK(11) ... ccc ccc cece een en eee nnn ene eee none 132

Universe: Workers 16 years and over
Total, Hispanic origin:
All races:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
White:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Black:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Other:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Not of Hispanic origin:
(Repeat RACE By MEANS OF TRANSPORTATION TO WORK)
Hispanic origin:
(Repeat RACE By MEANS OF TRANSPORTATION TO WORK)

2-2. Iil-1 | SEX(S) BY OCCUPATION(15) OF WORKERS ......... 0c cee en cree erence eee 45
Universe: Workers 16 years and over
Both sexes:
All occupations
Executive, administrative, and managerial occupations (000-042)
Professional specialty occupations (043-202)
Technicians and related support occupations (203-242)
Sales occupations (243-302)

1990 CTPP TABLE OUTLINES-Part 2 August 5, 1993 Page 2-1


1990 1980 Total number

Table Table. Title of data cells
2-11. 111-4 | MEDIAN EARNINGS OF WORKERS(1) BY MEANS OF TRANSPORTATION(11) ...... WW
Universe: Workers 16 years and over with earnings
Total
Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated
Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means
Worked at home

2-12. 11l-4 | MEAN EARNINGS OF WORKERS(1) BY MEANS OF TRANSPORTATION(11) .......- 1
Universe: Workers 16 years and over with earnings
Total
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home

2-13. 111-10 AGGREGATE NUMBER OF VEHICLES USED IN TRAVEL TO WORK(1) .........0.665 1
Universe:Workers 16 years and over using a car, truck, or van
Total

2-14. IIl-11 WORKERS PER VEHICLE(1) 2.0.00... ccc cece cece ee eee teen ene 1
Universe: Workers 16 years and over using a car, truck, or van
Total

2-15. N/A AGGREGATE NUMBER OF VEHICLES USED INCARPOOLING(1) ........00+eeeeeee 1
Universe: Workers 16 years and over in a carpool
Total

2-16. 111-12 WORKERS PER CARPOOL(1)........:e cece sete rete eter e eect nena tn eneenee 1

Universe: Workers 16 years and over in a carpool
Total

1990 CTPP TABLE OUTLINES—Part 2 August 5, 1993 Page 2-7


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE

REGRESSION RESULTS

HBW Rates Regression Output:

Constant 2.716
Std Err of Y Est 0.030
R Squared 0.988
No. of Observations 9
Degrees of Freedom 7
X Coefficient(s) — -0.000

Std Err of Coef. 0.0000

HBW Vehicle Occupancies - Regression Output

Constant 1.3066785449
Std Err of Y Est 0.0322392056
R Squared 0.191603929
Ho. of Observations 9
Degrees of Freedom 7
X Coefficient(s) -0.0000000428

Std Err of Coef. 0.0000000332

HEW Peak to Daily Ratios -

Regression Output

HBW Travel Times

Coristant

Std Err of Y Est

R Squared

No. of Observations
Degrees of Freedom

X Coefficient(s)
Std Err of Coef.

0.0000061686
0.0000007955

Mode-SplitRegression Output:

Constant -0.00
Std Err of Y Est 0.002
R Squared 0.924
No. of Observations 9
Degrees of Freedom 7
X Coefficient(s) 0.0000

Std Err of Coef. 0.0000

Constant 0.3726705556
Std Err of Y Est 0.0056942254
R Squared 0.8517891937
Wo. of Observations 9
Degrees of Freedom 7
X Coefficient(s) 0.0000000372

Std Err of Coef. 00000000059

Exhibit CS-A-8

42

Regression Output

47578937442
0.7723154478
0.8957276139
9
7




CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE

6.4

Review relationships

6.4.1

6.4.2

Prepare scatterplots of travel characteristics/urban size relationships
to "see" relationships for trip rates, travel times, vehicle occupancies,
mode splits and peak percentages as shown in Exhibits CS-A-3
through CS-A-7.

Use regression analysis to determine statistical relationships between

travel characteristics and urban size. Regression results are shown
in Exhibit CS-A-8.

36


1990 1980 Total number
Table Table __Title of data cells

C-4. N/A AGGREGATE NUMBER OF VEHICLES USED IN CARPOOLING(1) BY TIME LEAVING
HOME TO GO TO WORK-TOTAL AND PEAK PERIOD(2) ......0-- +e sees ence eens 2
Universe: Workers 16 years and over in a carpool
Total, time leaving home to go to work
Peak period (6:30 a.m. to 8:29 a.m.)

C-5. IV-3 WORKERS PER CARPOOL(1) BY TIME LEAVING HOME TO GO TO WORK-TOTAL
AND PEAK PERIOD(2) ....... ccc eee eee e eee e eect ence eee n ence teen renee 2
Universe: Workers 16 years and over in a carpool
Total, time leaving home to go to work
Peak period (6:30 a.m. to 8:29 a.m.)

C-6. N/A MEDIAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF TRANSPORTATION(19)
BY TIME LEAVING HOME TO GO TO WORK-TOTAL AND PEAK PERIOD(2) ........- 38
Universe: Workers 16 years and over who did not work at home
Total, time leaving home to go to work:

Workers who did not work at home
Drove alone
In 2-person carpool
In 3-person carpool
In 4-person carpool
In 5-person carpool
In 6-person carpool
In 7-to-9-person carpool
In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad
Ferryboat
Taxicab
Motorcycle
Bicycle
Walked
Other means
Peak period (6:30 a.m. to 8:29 a.m.):
(Repeat MEANS OF TRANSPORTATION)

C-7. IV-2 | MEAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF TRANSPORTATION(19)
BY TIME LEAVING HOME TO GO TO WORI-TOTAL AND PEAK PERIOD(2) .......-- 38
Universe: Workers 16 years and over who did not work at home
Total, time leaving home to go to work:

Workers who did not work at home
Drove alone

In 2-person carpool

In 3-person carpool

In 4-person carpool

In 5-person carpool

in 6-person carpool

1990 CTPP TABLE OUTLINES-Part C February 1, 1993 Page C-2


Because this particular table reports JTW information, the geographic summary
levels, or the third dimension, will differ from either the Place of Residence or the Place
of Work summary levels. For example, instead of having one table available for each TAZ
within an urban area of 500 TAZs, or 500 tables, a JTW summary table will be provided
for every TAZ pair in which commuting trips were made. Thus, there could be 500
destinations for trips that begin in TAZ #1. If there are trips made among all TAZ pairs,
there would be a total of 250,000 tables (or 500 squared) available within the CTPP JTW
tabulations. This information will reflect trip tables generated by travel demand models.
As noted in Chapter 3, a comparison of CTPP and travel demand model estimated trip
tables is one of the more important checks to be made during model validation.

As stated previously, a complete listing of the CTPP tables contained in Parts A, B
and C and Parts 1, 2 and 3 is provided in the Appendix. It is recommended that you take
time to review these tables and how they have been organized with respect to the
variables that define the unit of measure (such as workers or households). When
reviewing them, note that in nearly all instances the table descriptions begin with the
table's universe, followed by the cross-tabulation variables used to describe the
universe. The number of cells in the table appears to the right of the descriptions, and is
based on the number of categories in each cross-tabulation. For example, Table C-1,
Workers by Time Leaving Home to Go to Work and Means of Transportation, has a total
of 38 cells. As previously illustrated in Exhibit 2-4, there are two categories for time
leaving home and 19 categories for travel mode that, when combined, total the 38 table
cells. The table descriptions also define the summary levels provided in each of the Parts.
As shown on page A-24 of the Appendix, there is a total of 2,481 table cells within Part A
of the Statewide Element.

Summary

The CTPP has been organized into a Statewide and Urban Element, with the
Statewide Element providing totals for places, the balance of counties and totals for
counties and the state as a whole. The Urban Element provides totals for individual
TAZs or census tracts, the Census-defined urbanized area, the MPO-defined study
area and the MSA in which the MPO is located. Each element is divided into parts, with
the primary distinction among the parts being how the data are tabulated, such as by
Place of Residence, Place of Work or JTW. The Statewide Element includes Parts A
through F, and the Urban Element includes Parts 1 through 8 (Part 5, however, does not
exist). Parts A, B and C in the Statewide Element and 1, 2 and 3 in the Urban Element
contain the same tables, yet with summaries provided at different geographic levels. It is
believed these parts will be the most useful to CTPP users. The remaining parts in either
element are specialized tabulations that were necessary because of size and
confidentiality considerations. For the Statewide Element, specialized tabulations are
available only for places and counties with 75,000 or more population. And within the
Urban Element, specialized tabulations are available within super districts of 100,000 or
more population. The exception in the Urban Element is Part 7, which is a Place of Work

15


from (i) Place A to Place B, (ii) County 1 to Place B, (iii) County 1 to County 2, and (iv)
Place A to County 2.

STATEWIDE
GEOGRAPHIC SUMMARY LEVELS

STATE

RESIDENCE WORKPLACE

Exhibit 2-1

Of interest in the Statewide Element are the types of JTW tabulations available for
all places greater than 2,500 population and all counties within the state. In most states,
there are quite a few places of 2,500 or more population. Depending on the number of
places and counties within the state, the Statewide Element can provide a high degree of
detail for JTW flow characteristics. Even within an urban area, the Statewide Element can
provide detailed information about JTW flows for suburb-to-suburb travel and from outlying
cities into a major city. The Statewide Element can also be used as a resource to identify
population, housing, workplace and JTW control totals within an urban area.

Urban Element

The Urban Element provides summaries for Traffic Analysis Zones (or census
tracts, for those MPOs that chose not to provide Census geography/TAZ equivalencies),
subtotals for the urbanized area defined by the Census Bureau, study area (as defined by
the MPO) and for the entire metropolitan statistical area, as defined by the Census Bureau.

10


TABLE OF CONTENTS

INTRODUCTION ....... 0.0.0 n teen ene 4
Organization of the Handbook ........... 0c cece cence eens e eset ees 1
CHAPTER 1 - OVERVIEW OF THECTPP ............... 0. ccc cece e eee e eee 3
What is the CTPP? 2.000... e nee eens 3
Census Definitions 2.0... 00. ccc nee e nee e enn eees 3
Unique Features of the CTPP ....... 0... ccc eee ete nee eee 6
CHAPTER 2 - ORGANIZATION OF THECTPP ..................0.0000 eee 9
CTPP Elements ..... 0... ccc cee n ete bette e nn eens 9
Statewide Element ....0 0.0... n eee ene eees 9

Urban Element... 00.00. e nen e eens 10

CTPP Parts 206. beeen bbe e ene eees 11
CTPP Tables 06... een tenet n ete e eens 12
SUMMALY 61 eee eee e nent tee teen eeeees 15
Preparing for Analysis Using the CTPP ....... 0... ccc eee eee eens 17
Questions 6... cece n nee e ene 19
AMSWELS 20 cee nett e eben eee aae 20
CASE STUDIES - INTRODUCTION ........... 0... ccc cece eee 21
Case Study: Travel Demand Characteristics by Urban Area Size ............ 23
Case Study: Assessing Commuter Bus Service .................000 eee ee 45
Case Study Answer Sheet .......0 0.0.00 ccc cece eee eee eee ene 65
CHAPTER 3 - CHECKING FOR REASONABLENESS ....................... 69
Types of Errors 6 eee nent e ene es 69
Weighting ..... 06. e nee e nee ees 70
Reasonableness CheckS ............ 0. eee cence eee ae 71
Use of CTPP Data in Travel Demand Forecasting ......................0. 72
Usual and Average Day Conditions ............ 0.00. c cece eee 72
Accessing the CTPP ... 0.6... cece cent eet eeee een eee 74
Software cece ne be eee e nee eens 74

BTS Technical Assistance ...... 2... cece eee eens 76


1990 1980
Table_Table

Total number
Title of data cells

1-26.1-7

1-27. 1-8

Sales occupations (243-302)
Administrative support occupations, including clerical (303-402)
Private household occupations (403-412)
Protective service occupations (413-432)
Service occupations, except protective and household (433-472)
Farming, forestry, and fishing occupations (473-502)
Precision production, craft, and repair occupations (503-702)
Machine operators, assemblers, and inspectors (703-802)
Transportation and material moving occupations (803-863)
Handlers, equipment cleaners, helpers, and laborers (864-902)
Armed Forces

Male:
(Repeat OCCUPATION)

Female:
(Repeat OCCUPATION)

SEX(8) BY INDUSTRY(19) FOR WORKERS ........ 0... c cece cece eee eee 57
Universe: Workers 16 years and over
Both sexes:
All industries
Agriculture, forestry, and fisheries (000-039)
Mining (040-059)
Construction (060-099)
Manufacturing, nondurable goods (100-229)
Manufacturing, durable goods (230-399)
Transportation (400-439)
Communications and other public utilities (440-499)
Wholesale trade (500-579)
Retail trade (580-699)
Finance, insurance, and real estate (700-720)
Business and repair services (721-760)
Personal services (761-799)
Entertainment and recreation services (800-811)
Health services (812-840)
Educational services (842-860)
Other professional and related services (841, 861-899)
Public administration (900-939)
Armed Forces (940-960)
Male:
(Repeat INDUSTRY)
Female:

(Repeat INDUSTRY)

SEX(3) BY CLASS OF WORKER(8) FOR WORKERS ...... 0. cece cece eee eens 24
Universe: Workers 16 years and over
Both sexes:

Total, class of worker

Private for profit wage and salary workers

Private not-for-profit wage and salary workers

Local government workers

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993 Page 1-10


1990 1980 Total number
Table Table Title of data cells

Railroad
Ferryboat
Taxicab
Motorcycle
Bicycle

Walked

Other means
Worked at home

B-8. N/A TIME OF ARRIVAL AT WORK OF WORKERS(39) .....-- 060s eee e reece tere tenes 39

Universe: Workers 16 years and over who did not work at home
Total

5:00 a.m. to 5:14 a.m.
5:15 a.m. to 5:29 a.m.
5:30 a.m. to 5:44 a.m.
5:45 a.m. to 5:59 a.m.
6:00 a.m. to 6:14 a.m.
6:15 a.m. to 6:29 a.m.
6:30 a.m. to 6:44 a.m.
6:45 a.m. to 6:59 a.m.
7:00 a.m. to 7:14 a.m.
7:15 a.m. to 7:29 a.m.
7:30 a.m. to 7:44 a.m.
7:45 a.m. to 7:59 a.m.
8:00 a.m. to 8:14 a.m.
8:15 a.m. to 8:29 a.m.
8:30 a.m. to 8:44 a.m.
8:45 a.m. to 8:59 a.m.
9:00 a.m. to 9:14 a.m.
9:15 a.m. to 9:29 a.m.
9:30 a.m. to 9:44 a.m.
9:45 a.m. to 9:59 a.m.
10:00 a.m. to 10:14 a.m.
10:15 a.m. to 10:29 a.m.
10:30 a.m. to 10:44 a.m.
10:45 a.m. to 10:59 a.m.
11:00 a.m. to 11:59 a.m.
12:00 p.m. to 12:59 p.m.
1:00 p.m. to 1:59 p.m.
2:00 p.m. to 2:59 p.m.
3:00 p.m. to 3:59 p.m.
4:00 p.m. to 4:59 p.m.
5:00 p.m. to 5:59 p.m.
6:00 p.m. to 6:59 p.m.
7:00 p.m. to 7:59 p.m.
8:00 p.m. to 8:59 p.m.
9:00 p.m. to 9:59 p.m.
10:00 p.m. to 10:59 p.m.
11:00 p.m. to 11:59 p.m.
12:00 a.m, to 4:59 a.m.

1990 CTPP TABLE OUTLINES-Part B February 1, 1993 Page B-4


CTPP CASE STUDIES
Answer Sheet

Note: Many answers listed in this section are open to interpretation, and could be different
given certain assumptions. These answers are to be used as a general guide.

CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE
PREPARING FOR ANALYSIS:

1. Persons and Households

2. Place (city or town)

3. Travel characteristics, including mode share (percent who use transit), work trip
rates per household, vehicle occupancy, travel times

4. CTPP Table A-1, Total Persons (Place of Residence, Statewide Element -
Geographic level is “Place’), Table A-4, Total Households; Table C-1, Time Leaving
Home to Go to Work by Means of Transportation; Table C-3, Workers per Vehicle;
Table C-7, Mean Travel Time to Work by Means of Transportation.

5. Yes. The CTPP contains only Journey-to-Work trips; most travel forecasting
models use Home-Based Work trips, which include the trip from work to home. You
will need to calculate work trip rates per household and other data summaries
because they are not directly provided in the CTPP.

Step 1.1 1. CTPP tables containing 'persons' as the universe:
A-1 Total Persons
A-5 Persons by Origin by Race
A-6 Persons by Sex by Age

2. Work trip rates per household - decrease
Work trip lengths - increase
Work trip vehicle occupancies - (increase if greater density)
Percentage of work trips made by transit - increase
Percentage of peak period trips - increase (due to peak spreading)

Step 2.1 1. Cross tabulations include: Size of HH, No. of Workers in HH, Means
of Transportation, Total/Peak Period, Median/Mean Income, etc.
2. 611,310
Step 2.2 3. Yes. The factor will likely decrease as an urban area's size
increases, due to greater trip chaining and the increased potential for

shift to transit.
4. 1,106,471
Step 2.3 5. Small town has the highest trip rate (2.70); River City has the lowest
(1.98).
6. Yes. Dwelling unit type, automobile ownership, household income.

CTPP Tables A-11, A-13, A-14, A-15, A-16, A-17, A-18 (the universe
must be 'households')

Step 3.1 1. Workers 16 years and over using a car, truck or van
2. 1.26 ,

65


Preparing for Analysis Using the CTPP

Answers:

1.
2.

Workers Age 16 Years and Over

Transit system map and route maps to identify areas not served by public transit;
a map of traffic analysis zones or census tracts to identify the geographic units of
analysis; land use maps or aerial photos to provide detail about land use types and
locations within the geographic area.

The Urban Element provides the data for this analysis at the TAZ or census tract
level. The Statewide Element, with summaries at the place or county level, would
not be able to provide enough detailed information on employee workplace
locations.

Part 1 - Place of Residence in the Urban Element. Part 2 provides Place of Work
information.

Vehicles Available; Household Income; Mobility Limitation Status; Time of Arrival
at Work; Number of Workers in Households; etc.

Select tables for the analysis could include Table 1-10, Mobility Limitation Status
by Employment Status; Table 1-18, Number of Workers in Household by Vehicles
Available; Table 1-44, Mobility Limitation Status by Means of Transportation to
Work; Table 2-10, Earnings of Workers by Means of Transportation (Place of
Work, Urban Element); Table 2-17, Vehicles Available by Means of Transportation
to Work by Workers in Household; Table 2-18, Time of Arrival at Work by Means
of Transportation.

20


1990 1980 Total number
it ti of data cells

Railroad
Ferryboat
Taxicab
Motorcycle
Bicycle
Walked
Other means

1-53. N/A MEAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(19) 00.0.0. cc cece eee eee e ence ence ence en ee tee eeentnes 19
Universe: Workers 16 years and over who did not work at home
Total
Drove alone
In 2-person carpool
In 3-person carpool
In 4-person carpool
In 5-person carpool
In 6-person carpool
in 7-to-9-person carpool
In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad
Ferryboat
Taxicab
Motorcycle
Bicycle
Walked
Other means

1-54. N/A STANDARD DEVIATION OF TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(19) 0.0.0. eee e eee e cere ert ence eee e eee eeeeeeneene 19
Universe: Workers 16 years and over who did not work at home
Total
Drove alone
In 2-person carpool
{n 3-person carpool
In 4-person carpool
in 5-person carpool
In 6-person carpool
In 7-to-9-person carpool
In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad
Ferryboat
Taxicab
Motorcycle

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993 Page 1-21


Unique Features of the CTPP

Similarities exist between the CTPP and other Census products, such as STF
(Summary Tape File) 3A. Notable differences also exist. First, the CTPP is the only
Census product that summarizes tables by Place of Work and by Place of Residence. All
other Census products provide information by Place of Residence only. Place of Work
tabulations can be extremely helpful in determining where concentrations of workers are
located and the characteristics of those workers, as stratified by work place location. For
example, the CTPP provides information about the characteristics of people who work
within a Central Business District or other major employment areas under analysis. It will
also provide characteristics of the work force for towns, cities, counties and states.
Because the CTPP provides the only summary of worker characteristics by Place of Work,
it will be of use to those outside the transportation planning profession as well.

CTPP TABLE 2-3
WORKERS BY INDUSTRY
Number of Cells = 3*19=57

Import area(s)

TAZ TAZ TAZ TAZ TAZ
Stratt Strat2. = TOTAL 1 2 3 4 5
Total Total 87104 41527 31145 11335 561 2536
Agriculture, Forestry, Fisheries Total 159 21 35 103 0 0
Mining Total 0 to) 0 0 0 )
Construction Total 4395 1852 1389 897 103 154
Manufacturing, Nondurable Total 7928 139 5151 2602 0 36
Manufacturing, Durable Total 9276 209 7726 1341 0 0
Transportation Total 1981 526 1318 65 (0) 72
Communication, Utilities Total 2017 430 1078 53 65 391
Wholesale Trade Total 2995 962 1659 209 21 144
Retail Trade Total 8703 6374 1987 34 233 75
Finance, Insurance, Real Estate Total 9478 9034 364 0 36 44
Business and Repair Service Total 2738 1267 321 1122 18 10

Exhibit 1-1

Exhibit 1-1 shows how Place of Work data may be summarized. In the example, a study
area consisting of five TAZs has been created to identify the characteristics of workers
who commute to the study area. The CTPP table used here reports the total number of
workers in each industry for each of the five TAZs. Understanding the number of workers
by industry could help to assess the need for commuter bus service to the area, for
example, especially if bus ridership in the area is connected to certain industry segments
of the workforce. Other CTPP tables can also be used to examine time of arrival at work
and travel time by mode to the five TAZs in the example, and so that further analysis can
be conducted.


1990 1980
Table__Table

Total number
Title _ of data calls

1-47. 1-24

1-48. 1-27

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated
Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means
Worked at home

MEAN HOUSEHOLD INCOME(1) BY MEANS OF TRANSPORTATION TO WORK(11)
FORWORKERS INHOUSEHOLDS 2.0.0.0... cece cece e rece cence renee eee nenees 11
Universe: Workers 16 years and over in households

Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

Worked at home

VEHICLES AVAILABLE(6) BY MEANS OF TRANSPORTATION TO WORK(11) FOR
WORKERS INHOUSEHOLDS .... 0... ccc cece cece ence ence ener eveeeeeeenees 66
Universe: Workers 16 years and over in households
Total, vehicles available:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
in 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
No vehicles:
(Repeat MEANS OF TRANSPORTATION)
1 vehicle:
(Repeat MEANS OF TRANSPORTATION)
2 vehicles:
(Repeat MEANS OF TRANSPORTATION)
3 vehicles:
(Repeat MEANS OF TRANSPORTATION)
4 or more vehicles:
(Repeat MEANS OF TRANSPORTATION)

1990 CTPP TABLE OUTLINES-Part 1 August 5, 1993 Page 1-19




CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE
INTRODUCTION

Urban areas in the State of States
(Exhibit CS-A-2) have been growing
rapidly. The Department of
Transportation has recognized that as
cities grow, travel characteristics change.
To make sure that traffic forecasts take
into account changing travel
characteristics, the DOT is attempting to
develop reasonable __ relationships
between urban area size (defined by
population) and key travel parameters
(trip rates, trip lengths, vehicle
occupancies, etc.). These relationships
will help check the reasonableness of
traffic forecasts made for each of the 9 ~ River City
state's urban areas.

Exhibit CS-A-2

PREPARING FOR ANALYSIS:

In order to use the CTPP in this exercise, you will need to think about how the analysis will
be conducted. Remember the questions presented earlier in this handbook that should
serve as guidelines for analysis using the CTPP.

1. Based on the case study introduction, what would be the likely unit(s) of measure
needed in this analysis?
2. What is the geographic area of analysis needed?

3. What do you want to find out about the urban areas in the State of States?

4. Refer to the Appendix. Given your answers to questions 1-3 above, in what CTPP
tables could you find the data needed for this analysis?

5. Are manipulations of the CTPP data necessary? Why or why not?

25






1990 1980

Total number

Table Table Title of data cells
In 3-person carpool:
(Repeat TRAVEL TIME TO WORK)
In 4-or-more-person carpool:
(Repeat TRAVEL TIME TO WORK)
Bus or trolley bus:
(Repeat TRAVEL TIME TO WORK)
Streetcar, trolley car, subway, or elevated:
(Repeat TRAVEL TIME TO WORK)
Railroad:
(Repeat TRAVEL TIME TO WORK)
Bicycle or walked:
(Repeat TRAVEL TIME TO WORK)
Taxicab, ferryboat, motorcycle, or other means:
(Repeat TRAVEL TIME TO WORK)
A-38. N/A MEDIAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(10) 00.0... ccc cece cece e eee eeee 10
Universe: Workers 16 years and over who did not work at home
Total
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
A-39. N/A MEAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(10) 0... cece cece eee eee eee renee e nena 10
Universe: Workers 16 years and over who did not work at home
Total
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
A-40. N/A AGGREGATE NUMBER OF VEHICLES USED IN TRAVEL TOWORK(1) .......+-0000 1
Universe:Workers 16 years and over using a car, truck, or van
Total
A-41. 1-21 WORKERS PER VEHICLE(1) 0.00... cc cece cece cence eet tere eee eeneeee 1
Universe: Workers 16 years and over using a car, truck, or van
Total

1990 CTPP TABLE OUTLINES—Part A March 15, 1993 Page A-16


1990 1980
Table__Table

Title

Total number
of data cells

1-46.1-24

1990 CTPP TABLE OUTLINES—Part 1

$15,000 to $17,499:

(Repeat MEANS OF TRANSPORTATION)
$17,500 to $19,999:

(Repeat MEANS OF TRANSPORTATION)
$20,000 to $22,499:

(Repeat MEANS OF TRANSPORTATION)
$22,500 to $24,999:

(Repeat MEANS OF TRANSPORTATION)
$25,000 to $27,499:

(Repeat MEANS OF TRANSPORTATION)
$27,500 to $29,999:

(Repeat MEANS OF TRANSPORTATION)
$30,000 to $32,499:

(Repeat MEANS OF TRANSPORTATION)
$32,500 to $34,999:

(Repeat MEANS OF TRANSPORTATION)
$35,000 to $37,499:

(Repeat MEANS OF TRANSPORTATION)
$37,500 to $39,999:

(Repeat MEANS OF TRANSPORTATION)
$40,000 to $42,499:

(Repeat MEANS OF TRANSPORTATION)
$42,500 to $44,999:

(Repeat MEANS OF TRANSPORTATION)
$45,000 to $47,499:

(Repeat MEANS OF TRANSPORTATION)
$47,500 to $49,999:

(Repeat MEANS OF TRANSPORTATION)
$50,000 to $54,999:

(Repeat MEANS OF TRANSPORTATION)
$55,000 to $59,999:

(Repeat MEANS OF TRANSPORTATION)
$60,000 to $74,999:

(Repeat MEANS OF TRANSPORTATION)
$75,000 to $99,999:

(Repeat MEANS OF TRANSPORTATION)
$100,000 to $124,999:

(Repeat MEANS OF TRANSPORTATION)
$125,000 to $149,999:

(Repeat MEANS OF TRANSPORTATION)
$150,000 or more:

(Repeat MEANS OF TRANSPORTATION)

MEDIAN HOUSEHOLD INCOME(1) BY MEANS OF TRANSPORTATION TO WORK(11)

FOR WORKERS IN HOUSEHOLDS

Total

Drove alone

In 2-person carpool
In 3-person carpool

Universe: Workers 16 years and over in households

August 5, 1993

Page 1-18


1990 1980
Table_Table

Total number
Title of data cells

A-24, 1-25

A-25. 1-6

3 vehicles

4 vehicles

5 vehicles

6 vehicles

7 or more vehicles
1 unit, detached:

(Repeat VEHICLES AVAILABLE)
1 unit, attached:

(Repeat VEHICLES AVAILABLE)
2 to 4 units:

(Repeat VEHICLES AVAILABLE)
5 or more units:

(Repeat VEHICLES AVAILABLE)
Mobile home or trailer:

(Repeat VEHICLES AVAILABLE)
Other:

(Repeat VEHICLES AVAILABLE)

HISPANIC ORIGIN(3) BY RACE(4) BY MEANS OF TRANSPORTATION TO WORK(11). . 132
Universe: Workers 16 years and over
Total, Hispanic origin:
All races:
All means of transportation
Drove alone
In 2-person carpool
in 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
White:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Black: :
(Repeat MEANS OF TRANSPORTATION TO WORK)
Other:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Not of Hispanic origin:
(Repeat RACE By MEANS OF TRANSPORTATION TO WORK)
Hispanic origin:
(Repeat RACE By MEANS OF TRANSPORTATION TO WORK)

SEX(3) BY OCCUPATION(15) FOR WORKERS ........ 0. cece eee e eee ence enee 45
Universe: Workers 16 years and over
Both sexes:

All occupations

Executive, administrative, and managerial occupations (000-042)

Professional specialty occupations (043-202)

1990 CTPP TABLE OUTLINES-Part A March 15, 1993 Page A-9


The CTPP is the only source of JTW information available from the Census Bureau.
Detailed information about the commute trip from home to work is provided, allowing the
user to obtain such information as the origin and destination of each commuting trip, the
travel time of the trip, the travel mode used for the trip and when the trip began or
ended. This information will be helpful in both travel demand modeling and in assessing
the effectiveness of transportation programs designed primarily for commuters. Another
distinction of the CTPP from data sources is the summary of information by TAZ. Most
Metropolitan Planning Organizations (MPOs) developed Census geography and TAZ
equivalencies which were used by the Census Bureau to summarize tables by TAZ as
opposed to Census block groups or Census tracts. This will enable those MPOs directly
to introduce CTPP information into their land use data files (as used in travel demand
forecasting models); most MPOs have indicated that this will be their primary use of the
CTPP. However, as will be indicated throughout this handbook, the CTPP has a number
of other applications that are of benefit to CTPP users.

Exhibit 1-2 presents a summary of the types of tabulations available in the CTPP.
The Place of Residence tabulations report the characteristics of persons, households, and
workers by where they live. The Place of Work data summarize information about workers
(such as industry, sex, time of arrival at work, etc.) by where they work. The Journey to
Work (JTW) data provide travel characteristics about the trip from home to work, including
persons per vehicle, travel time in minutes and travel mode used.

AVAILABLE CTPP
TABULATIONS
Place of Work
Place of Residence
lea
Household
Characteristics
Journey-To-Work ‘
Characteristics ‘
Persond =p
Worker
Characteristics
Worker
it Characteristics
Exhibit 1-2


1990 1980 Total number
Table Table Title of data cells

A-36. N/A TIME LEAVING HOME TO GO TO WORK(7) BY MEANS OF TRANSPORTATION(10) ... 70
Universe: Workers 16 years and over who did not work at home
Total, time leaving home to go to work:

All workers who did not work at home

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means
5:30 a.m. to 6:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
6:30 a.m. to 7:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
7:30 a.m. to 8:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
8:30 a.m. to 9:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
9:30 a.m. to 10:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
10:30 a.m. to 5:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)

A-37. N/A MEANS OF TRANSPORTATION TO WORK(10) BY TRAVEL TIME TO WORK(16) ..... 160
Universe: Workers 16 years and over who did not work at home
Workers who did not work at home:

All travel times
Less than 5 minutes
5 to 9 minutes
10 to 14 minutes
15 to 19 minutes
20 to 24 minutes
25 to 29 minutes
30 to 34 minutes
35 to 39 minutes
40 to 44 minutes
45 to 49 minutes
50 to 54 minutes
55 to 59 minutes
60 to 74 minutes
75 to 89 minutes
90 minutes or more
Drove alone:
(Repeat TRAVEL TIME TO WORK)
In 2-person carpool:
(Repeat TRAVEL TIME TO WORK)

1990 CTPP TABLE OUTLINES~Part A March 15, 1993 Page A-15




1990 1980
Table Table _

Total number
Title of data cells

A-49. N/A

A-50. N/A

A-51. N/A

A-52. N/A

PERSONS IN HOUSEHOLD(5) BY WORKERS IN HOUSEHOLD(§) FOR WORKERS .... 25
Universe: Workers 16 years and over in households
Total, persons in household:
All workers in households
Workers in 1-worker household
Workers in 2-worker household
Workers in 3-worker household
Workers in 4-or-more-worker household
1 person in household:
(Repeat WORKERS IN HOUSEHOLD)
2 persons in household:
(Repeat WORKERS IN HOUSEHOLD)
3 persons in household:
(Repeat WORKERS IN HOUSEHOLD)
4 or more persons in household:
(Repeat WORKERS IN HOUSEHOLD)

WORKERS IN GROUP QUARTERS(1) 0.0.60. cece eee eee ener eee eeeee 1
Universe: Workers 16 years and over in group quarters
Total

MEANS OF TRANSPORTATION TO WORK(11) FOR WORKERS IN GROUP QUARTERS... 1 1
Universe: Workers 16 years and over in group quarters
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means
Worked at home

MEDIAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(19) 0.06.0 c csc e cece cee tenet e ence nen eect en en anes 19
Universe: Workers 16 years and over who did not work at home
Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-person carpool

In 5-person carpool

In 6-person carpool

In 7-to-9-person carpool

In 10-or-more-person carpool

Bus or trolley bus

Streetcar or trolley car

1990 CTPP TABLE OUTLINES—Part A March 15, 1993 Page A-20


1990 1980 Total number
Table Table. Title of data cells

Bus or trolley bus:

(Repeat TIME OF ARRIVAL AT WORK)
Streetcar, trolley car, subway, or elevated:

(Repeat TIME OF ARRIVAL AT WORK)
Railroad:

(Repeat TIME OF ARRIVAL AT WORK)
Bicycle or walked:

(Repeat TIME OF ARRIVAL AT WORK)
Taxicab, ferryboat, motorcycle, or other means:

(Repeat TIME OF ARRIVAL AT WORK)

B-27. N/A STANDARD DEVIATION OF TRAVEL TIME IN MINUTES(1) BY MEANS OF
TRANSPORTATION(10) BY TIME OF ARRIVAL AT WORK(7) ......--- +0 eee eeee 70
Universe: Workers 16 years and over who did not work at home
Workers who did not work at home:

All arrival times

5:30 a.m. to 6:29 a.m.

6:30 a.m. to 7:29 a.m.

7:30 a.m. to 8:29 a.m.

8:30 a.m, to 9:29 a.m.

9:30 a.m. to 10:29 a.m.

10:30 a.m. to 5:29 a.m.
Drove alone:

(Repeat TIME OF ARRIVAL AT WORK)
In 2-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
In 3-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
In 4-or-more-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
Bus or trolley bus:

(Repeat TIME OF ARRIVAL AT WORK)
Streetcar, trolley car, subway, or elevated:

(Repeat TIME OF ARRIVAL AT WORK)
Railroad:

(Repeat TIME OF ARRIVAL AT WORK)
Bicycle or walked:

(Repeat TIME OF ARRIVAL AT WORK)
Taxicab, ferryboat, motorcycle, or other means:

(Repeat TIME OF ARRIVAL AT WORK)

TOTAL NUMBER OF DATA CELLS IN PART B: 1,175

PART B RECORD SELECTION CRITERIA: All workers who work In the State, regardless of
where they live.

1990 CTPP TABLE OUTLINES-Part B February 1, 1993 Page B-12


CASE STUDY: ASSESSING COMMUTER BUS SERVICE

5. Determine Statistical Relationships
(Travel Time vs. Mode Share)

Questions to be answered:

1.

Results from Step 4 are transposed in the spreadsheet for regression analysis.
Regression analysis will be used to identify routes that operate poorly due to "other"
factors. How can regression analysis provide this information?

Travel times are to be related to mode shares to determine the strength of the
relationship and to estimate what travel times should be given actual travel times.
For this regression model, what is the independent variable? What is the
dependent variable?

What is the R? of the travel time and mode share relationship? Is this a strong
relationship?

An estimate of ridership will be calculated based on regression results and actual
travel times. How would you calculate estimated ridership?

A confidence interval helps define routes that truly are operating better or worse
than expected. How would you calculate the upper and lower limits of the
confidence interval?

61


CASE STUDY: ASSESSING COMMUTER BUS SERVICE

PREPARING FOR ANALYSIS:

1.
2.
3.

Step 2

Step 3

Step 4

Workers 16 years and over who did not work at home

Traffic analysis zones (or census tract)

Transit route map and a TAZ map to identify the zones that comprise commuter
route travel sheds and central business district TAZs.

Travel times by means of transportation. Other cross-tabulations that may be
helpful would be number of workers per carpool and average vehicle occupancy.
CTPP Table 3-1, Time Leaving Home to Go to Work by Means of Transportation
(Journey-to-Work, Urban Element - geographic summary level is Traffic Analysis
Zones); Table 3-7, Mean Travel Time to Work in Minutes by Means of
Transportation.

1.

Travel sheds include all areas served by a single transit line. The
transit system's route maps will indicate which areas are served by a
bus route to the CBD. TAZs are then grouped to approximate the
travel sheds.

CTPP Table 3-1, Time Leaving Home to Go to Work - Total and Peak
Period - By Means of Transportation to Work

Total number of CBD trips = 102,999

Travel shed 13 generates the most trips (22,987)

CTPP Table 3-7, Mean Travel Time to Work (in Minutes) by Means
of Transportation by Time Leaving Home to Go to Work - Total/Peak
Period.

Mean travel times should be used. Median travel times should be
used when outliers (data not falling within expected ranges) are
thought to skew results.

42 minutes; 606 minutes

Weighted average is calculated by combining travel times with trips
Multiply trips time mean travel times

1,040,289

7.5 percent

Percent Vehicle Trips = Sum of all non-transit vehicle trips divided by
total trips.

Percent Transit Trips = Sum of all transit trips divided by total trips
Sum of all non-transit person hour travel times divided by the sum of
all non-transit vehicle trips.

Sum of all transit person hour travel times divided by the sum of all
transit trips.

Travel time ratio is calculated by dividing average transit commuting
time by average vehicle commuting time (in minutes).

Routes 8, 15 and 19.

67


of the CTPP tables in Parts A, B, and C of the Statewide Element. In Appendix A, the
outline for Table A-1 identifies population within a place or county. Similarly, the outline
for Table A-4 identifies household data for a place, county, or state.

Part B in the Statewide Element contains tables that define workers by Place of
Work. This part would be helpful to identify the characteristics of workers within each
place or county. Note that in Part B, some of those workers may actually have their
residence in another city or county. When reviewing each part, you will notice that there
are tables provided in Part A of the Statewide Element that describe worker characteristics.
These tables differ from those available in Part B, in that Part A describes the workers by
where they live and Part B describes the workers by where they work.

Part C of the Statewide Element contains tables that describe the characteristics
of the Journey-to-Work. For example, the outline for Table C-1 in Appendix A, which
identifies the means of transportation to work, shows how Part C can be used to identify
the total number of work trips made by travel mode for each Census-defined place within
a particular state.

Turn again to Appendix A and note that Parts 1, 2 and 3 of the Urban Element
contain the same table variables that are provided in Parts A, B and C of the Statewide
Element. The difference between the parts of the two elements is the geographic level of
detail at which the data are summarized. The Statewide Element includes summaries by
place, balance of county, county and state; Parts 1, 2 and 3 of the Urban Element provide
table summaries by TAZ or census tract, urbanized area, study area and MSA.

The remaining parts in the Statewide and Urban Elements are specialized
tabulations created to provide greater detail for household, place of work and worker flow
information. These specialized parts are only available for very large areas to avoid
problems caused by confidentiality concerns and large table sizes. For the Statewide
Element, specialized tabulations are available only for places and counties with 75,000 or
more population. Within the Urban Element, specialized tabulations are available within
super districts of 100,000 or more population. The exception in the Urban Element is Part
7, which is a Place of Work summary available by Census Tract. This part is intended
primarily for non-transportation users who would like to get Census information by typical
Census geography.

CTPP Tables

As noted in the Introduction, the CTPP is a collection of summary tables that cannot
be disaggregated. The table structure has been defined by transportation practitioners on
the Transportation Research Board's Committee on Data Collection and Information
Systems, the Federal Transit Administration, the Federal Highway Administration and the
Census Bureau. Two prominent issues defining the selected table designs were

12


(Repeat TIME OF ARRIVAL AT WORK)
In 3-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
In 4-or-more-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
Bus or trolley bus:

(Repeat TIME OF ARRIVAL AT WORK)
Streetcar, trolley car, subway, or elevated:

(Repeat TIME OF ARRIVAL AT WORK)
Railroad:

(Repeat TIME OF ARRIVAL AT WORK)
Bicycle or walked:

(Repeat TIME OF ARRIVAL AT WORK)
Taxicab, ferryboat, motorcycle, or other means:

(Repeat TIME OF ARRIVAL AT WORK)

TOTAL NUMBER OF DATA CELLS IN PART 2: 1,175

PART 2 RECORD SELECTION CRITERIA: All workers who work In the CTPP region,
regardless of where they live.

1990 CTPP TABLE OUTLINES-Part 2 August 5, 1993 Page 2-14


1990 1980 Total number
Table_Table _Title of data cells
A-42. N/A AGGREGATE NUMBER OF VEHICLES USED INCARPOOLING(1) «0.6.0.0: sees eens 1
Universe: Workers 16 years and over in a carpool
Total
A-43. 1-22 WORKERSPERCARPOOL(1) ........ ccc cece cece cree eee eect eeennnnee 1
Universe: Workers 16 years and over in a carpool
Total
A-44, N/A MOBILITY LIMITATION STATUS(3) BY MEANS OF TRANSPORTATION TO WORK(11). . 33
Universe: Workers 16 years and over
Total, mobility limitation status:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
With a mobility limitation:
(Repeat MEANS OF TRANSPORTATION)
No mobility limitation:
(Repeat MEANS OF TRANSPORTATION)
A-45. 1-24 | HOUSEHOLD INCOME IN 1989(26) BY MEANS OF TRANSPORTATION TO

WORK(11) FOR WORKERS IN HOUSEHOLDS ........ see sees cece nee e ener eed 286
Universe: Workers 16 years and over in households
Total, household income for workers in households:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
Less than $5,000:
(Repeat MEANS OF TRANSPORTATION)
$5,000 to $9,999:
(Repeat MEANS OF TRANSPORTATION)
$10,000 to $12,499:
(Repeat MEANS OF TRANSPORTATION)

1990 CTPP TABLE OUTLINES—Part A March 15, 1993 Page A-17


Preparing for Analysis Using the CTPP

Now that you have been introduced to the CTPP's unique features and how the
information is organized, there are several key steps to follow before analysis can take
place. You may want to think of these steps as a series of questions that must be
answered to know which tables should be used and how the data contained in the tables
can be applied. The following questions, once answered, will guide your use of the CTPP:

e What is it that | am trying to measure?

e What is the geographic area that | want to study?

e What do | want to know about the item(s) | am trying to measure?

e What kinds of analysis or manipulations of the data might be needed?
° How has the unit of measure or geographic area changed since 1990?

There may be other questions that you can think of, but answering these questions
will get you started on the right path. Turn now to the table summaries shown in the
Appendix of this handbook. Pay particular attention to the unit of measure in each table
and the ways in which the data contained in each table are cross-tabulated. You will need
to become familiar with the available tables before beginning any analysis using CTPP
data.

The first thing you need to know is what the unit of measure will be, which is
referred to in Census terms as the Universe. For example, if you want to know an area's
population, you need to determine if you want to count households or people. If you want
to identify trip rates per household, you need to decide if you want to count workers per
household or persons per household. Related to this question, you will need to ask
yourself if you want the characteristics of workers by where they live, or by where they
work. Your answer will determine which CTPP Part to access.

The second question involves the geographic area of analysis. If you want to
summarize travel characteristics at employment centers, you have to determine whether
you want this information for a city or county, or for the Central Business District within a
city. Depending on how you answer this question, you will use either the Statewide or
Urban Element of the CTPP.

Once you have identified the unit of measure, or universe, you need to think about
what you want to know about it. Let's say you are trying to identify the mode of travel used
for work trips within a major travel corridor. Workers may be the unit of measure, but there
are cross-tabulations of workers by means of transportation and time leaving home. The
results of your analysis will depend on whether you use peak period numbers or total
numbers for the time workers leave home to go to work. Similarly, households or persons

17


CASE STUDY: ASSESSING COMMUTER BUS SERVICE

TAZ Map

1, Identify CBD TAZs

Bus Route Map

2. Identify Route Travelsheds

Travelshed/TAZ
Equivalency

3. Identify Travelshed to CBD
Trips/Travel Times

CTPP Tables

3.1 Import CTPP Trips

3.3 Calculate Total Travel Times

3.2 Import CTPP Travel Times [(<—————————

4, Calculate Mode Shares -
Comparative Travel Times

Poor Travel
Time Routes

5. Determine Statistical Relationships
(Travel Time vs. Mode Share)

ID Routes that are operating poorly
because of “other” factors

Exhibit CS-B-1

46



1990 1980
Table Table

Total number
Title of data cells

A-32. N/A

A-33. 1-23

6:00 p.m. to 6:59 p.m.
7:00 p.m. to 7:59 p.m.
8:00 p.m, to 8:59 p.m.
9:00 p.m. to 9:59 p.m.
10:00 p.m. to 10:59 p.m.
11:00 p.m. to 11:59 p.m.
12:00 a.m. to 4:59 a.m.

NUMBER OF HOURS WORKED LAST WEEK(6) BY MEANS OF TRANSPORTATION
TO WORK(11) oo eee ccceccececc eee nen nen e teen ene teen ene 66
Universe: Workers 16 years and over
Total, number of hours worked last week:

All means of transportation

Drove alone

In 2-person carpool

In 3-person carpool

In 4-or-more-person carpool

Bus or trolley bus

Streetcar, trolley car, subway, or elevated

Railroad

Bicycle or walked

Taxicab, ferryboat, motorcycle, or other means

Worked at home
Less than 15 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)
15 to 20 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)
21 to 34 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)
35 to 40 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)
Over 40 hours:

(Repeat MEANS OF TRANSPORTATION TO WORK)

EARNINGS OF WORKERS(12) BY MEANS OF TRANSPORTATION(11) .......6++ ++ 132
Universe: Workers 16 years and over
With earnings:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
Less than $5,000 or loss:
(Repeat MEANS OF TRANSPORTATION)

1990 CTPP TABLE OUTLINES-Part A March 15, 1993 Page A-13


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE
TRIP RATES BY URBAN AREA SIZE

2. Calculate Trip Rates by Urban Area

CTPP Table(s)

2.1 Download HHs and JTW Trips

Conversion
Factors

2.2 Convert JTW to HBW Trips

2.3 Divide HBW Trips by Population

6. Determine Relationship Between 7 Trip Generation
Urban Area Size and Trip Rates Models

Questions to be answered:

Step 2.1 1.
2.
Step 2.2 3.
4.
Step 2.3 5.
6.

How are total households (HHs) cross-tabulated in the CTPP? What
are the cross-tabulations in the table that contains Journey-to-Work
(JTW) trips?

After completing Step 2.1 in the spreadsheet, how many JTW trips
are generated in River City?

Use the factor of 1.81 to convert JTW to HBW trips. Do you think this
factor will vary by urban area size and, if so, how?

After completing Step 2.2, how many HBW trips are generated per
day in River City?

What city has the highest trip rate? the lowest?

The case study calculates an overall trip rate for each urban area.
Would you expect a variation of trip rates by HH characteristics? If
so, what characteristics influence trip rates and what CTPP tables
would you use to identify trip rates by HH type by urban area size?

29




1990 1980 Total number
Table Table Title of data cells

State government workers

Federal government workers

Self-employed workers

Unpaid family workers
Male:

(Repeat CLASS OF WORKER)
Female:

(Repeat CLASS OF WORKER)

1-28. N/A SEX(3) BY NUMBER OF HOURS WORKED LAST WEEK(6) FOR WORKERS ........ 18
Universe: Workers 16 years and over
Both sexes:
Total, number of hours worked last week
Less than 15 hours
15 to 20 hours
21 to 34 hours
35 to 40 hours
Over 40 hours
Male:
(Repeat NUMBER OF HOURS WORKED LAST WEEK)
Female:
(Repeat NUMBER OF HOURS WORKED LAST WEEK)

1-29. N/A SEX(8) BY MEANS OF TRANSPORTATION TO WORK(11) ......000s ee eee eee eeee 33
Universe: Workers 16 years and over
Both sexes:
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
Male:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Female:
(Repeat MEANS OF TRANSPORTATION TO WORK)

1-30. 1-18 | MEANS OF TRANSPORTATION TOWORK(20) 00... 00. e eee e cree erence eeeeee 20
Universe: Workers 16 years and over
Total
Drove alone
In 2-person carpool
In 8-person carpool
In 4-person carpool
In 5-person carpool

1990 CTPP TABLE OUTLINES—Part 1 August 5, 1993 Page 1-11


confidentiality and size. The Census Bureau has strict requirements regarding
confidentiality that can be violated by either presenting information at a very detailed
geographic level, (e.g., blocks) or by providing too much detail about population or
household characteristics at larger geographic areas. Furthermore, when three or more
cross-tabulations of data are combined, tables become quite large and difficult to manage.
Therefore, tables for smaller geographic summary levels such as TAZs include limited
amounts of household or population characteristics detail. Several tables can be
combined to obtain a complete picture of the geographic area's characteristics, however.
The tables for the specialized parts, as mentioned above, were developed to help address
this issue.

Most of the information for the CTPP is developed from questions on the Census
long form. The long form was completed by about one in six households in the country,
with a sampling rate that varied by the type of area. Rural areas had up to a one in two
sampling rate, while some urban areas had as low as a one in 20 sampling rate. A lower
sampling rate is needed in urban areas because of the likelihood of homogeneous socio-
economic and travel characteristics in dense communities.

EXAMPLE TABULATION

All of the tables provided in

the CTPP have the same

general _ structure. As

TPP Table A-6 or (1-6), Persons by Sex and Age illustrated in Exhibit 2-3,
each CTPP table is defined
by a universe and one or

ep more cross-tabulation vari-
oy oss Tabulation #1 ables. In the example, the
& (Census Sexson #3) number of persons is the
toss Tabulation #2 Total Male Female universe and age and sex
(Census Question #53) are the cross-tabulation
Geil) x x x variables used to define
16, 17 a x persons. All CTPP tables
18-20 x Universo « provide universe totals (in
ae x Persons this example, it would be
35-44 x x x total persons) as well as
45-54 m x m totals for each of the cross-
an = a * classification categories
65-15 x x x used (for example, total
15+ x * ee males or total females).

Number of Cells = 3 Sex Categories * 12 Age Categories =

&

Note: Age has been classified into categories

Exhibit 2-3

13


CASE STUDY: ASSESSING COMMUTER BUS SERVICE

4, Calculate Mode Shares - Poor Travel
Comparative Travel Times Time Routes
v
Questions to be answered:
1. Mode shares. and travel times are calculated in this step. How did you calculate:

@ % Vehicle Trips?

e@ % Transit Trips?

@ Avg. Vehicle Travel Times?
© Avg. Transit Travel Times?
@ Travel Time Ratio?

2. Routes in what three travel sheds have relatively slow travel times?

57


1990 1980
Table__Table.

Total number
Title of data cells

1-21. N/A

1-22. N/A

1-23. N/A

$150,000 or more
No vehicles:

(Repeat HOUSEHOLD INCOME)
1 vehicle:

(Repeat HOUSEHOLD INCOME)
2 vehicles:

(Repeat HOUSEHOLD INCOME)
3 vehicles: .

(Repeat HOUSEHOLD INCOME)
4 vehicles:

(Repeat HOUSEHOLD INCOME)
5 vehicles:

(Repeat HOUSEHOLD INCOME)
6 vehicles:

(Repeat HOUSEHOLD INCOME)
7 or more vehicles:

(Repeat HOUSEHOLD INCOME)

MEDIAN HOUSEHOLD INCOME IN 1989(1) BY VEHICLES AVAILABLE(9) ......... 9
Universe: Households
Total

No vehicles

1 vehicle

2 vehicles

3 vehicles

4 vehicles

5 vehicles

6 vehicles

7 or more vehicles

MEAN HOUSEHOLD INCOME IN 1989(1) BY VEHICLES AVAILABLE(9)........... 9
Universe: Households
Total

No vehicles

1 vehicle

2 vehicles

8 vehicles

4 vehicles

5 vehicles

6 vehicles

7 or more vehicles

UNITS IN STRUCTURE(7) BY VEHICLES AVAILABLE(9) ...............0000 eee 63
Universe: Households
Total, units in structure:

Total, vehicles available

No vehicles

1 vehicle

2 vehicles

3 vehicles

1990 CTPP TABLE OUTLINES—Part 1 August 5, 1993 Page 1-8


1990 1980 Total number
Table Table. Title of data celis

(Repeat MEANS OF TRANSPORTATION)
7:30 a.m. to 8:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
8:30 a.m. to 9:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
9:30 a.m. to 10:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)
10:30 a.m. to 5:29 a.m.:

(Repeat MEANS OF TRANSPORTATION)

B-19. N/A MEANS OF TRANSPORTATION TO WORK(10) BY TRAVEL TIME TO WORK(16) .... . 160
Universe: Workers 16 years and over who did not work at home
Workers who did not work at home:

All travel times

Less than 5 minutes

5 to 9 minutes

10 to 14 minutes

15 to 19 minutes

20 to 24 minutes

25 to 29 minutes

30 to 34 minutes

35 to 39 minutes

40 to 44 minutes

45 to 49 minutes

50 to 54 minutes

55 to 59 minutes

60 to 74 minutes

75 to 89 minutes

90 minutes or more
Drove alone:

(Repeat TRAVEL TIME TO WORK)
In 2-person carpool:

(Repeat TRAVEL TIME TO WORK)
In 3-person carpool:

(Repeat TRAVEL TIME TO WORK)
In 4-or-more-person carpool:

(Repeat TRAVEL TIME TO WORK)
Bus or trolley bus:

(Repeat TRAVEL TIME TO WORK)
Streetcar, trolley car, subway, or elevated:

(Repeat TRAVEL TIME TO WORK)
Railroad:

(Repeat TRAVEL TIME TO WORK)
Bicycle or walked:

(Repeat TRAVEL TIME TO WORK)
Taxicab, ferryboat, motorcycle, or other means:

(Repeat TRAVEL TIME TO WORK)

1990 CTPP TABLE OUTLINES-Part B February 1, 1993 Page B-8


1990 1980 Total number
Ll I ti of data cells

B-23. N/A MEAN TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(19) ......ccccceeeeeeeeeeeeeeeeeeeteeeeeseeeeeneneee 19
Universe: Workers 16 years and over who did not work at home
Total
Drove alone
In 2-person carpool
in 3-person carpool
In 4-person carpool
In 5-person carpool
In 6-person carpool
In 7-to-9-person carpool
In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad
Ferryboat
Taxicab
Motorcycle
Bicycle
Walked
Other means

B-24. N/A STANDARD DEVIATION OF TRAVEL TIME TO WORK IN MINUTES(1) BY MEANS OF
TRANSPORTATION(19) 00.0000. e cece cece eee eee e erence ee en ee enenenees 19
Universe: Workers 16 years and over who did not work at home
Total
Drove alone
{n 2-person carpool
In 8-person carpool
In 4-person carpool
In 5-person carpool
In 6-person carpool!

In 7-to-9-person carpool
In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad

Ferryboat

Taxicab

Motorcycle

Bicycle

Walked

Other means

1990 CTPP TABLE OUTLINES-Part B February 1, 1993 Page B-10


APPENDICES

Appendix A: 1990 Census Transportation Planning Package
Table Outline: Statewide Element Parts A, B & C
Table Outline: Urban Element Parts 1,2 & 3
Appendix B: 1990 Census Questionnaire

Exhibit 1-1
Exhibit 1-2
Exhibit 2-1
Exhibit 2-2
Exhibit 2-3
Exhibit 2-4
Exhibit 3-1
Exhibit 3-2

LIST OF EXHIBITS
Workers by Industry... 6.0.0. ccc cee eee teens 6
Available CTPP Tabulations ............0 060 e eee eee ee 7
Statewide Element Geographic Summary Levels .............--.-. 10
Urban Element Geographic Summary Levels ..............--2555 41
Example Place of Residence Tabulation ............-..--..005- 13
Example Journey-to-Work Tabulation .... 6.6.6.6... ee eee eee eee 14
Trip Table Checks ..... 6... cece ene 73

Example of TransVU Screen ...... 2.00.0 75


1990 1980
Table__Table

Total number
Title of data cells

A-28. N/A

A-29. N/A

A-30. 1-18

Local government workers

State government workers

Federal government workers

Self-employed workers

Unpaid family workers
Male:

(Repeat CLASS OF WORKER)
Female:

(Repeat CLASS OF WORKER)

SEX(3) BY NUMBER OF HOURS WORKED LAST WEEK(6) FOR WORKERS ........ 18
Universe: Workers 16 years and over
Both sexes:

Total, number of hours worked last week

Less than 15 hours

15 to 20 hours

21 to 34 hours

35 to 40 hours

Over 40 hours
Male:

(Repeat NUMBER OF HOURS WORKED LAST WEEK)
Female:

(Repeat NUMBER OF HOURS WORKED LAST WEEK)

SEX(3) BY MEANS OF TRANSPORTATION TO WORK(11) .... 20. e sees eee eee e ee 33
Universe: Workers 16 years and over
Both sexes: :
All means of transportation
Drove alone
In 2-person carpool
In 3-person carpool
In 4-or-more-person carpool
Bus or trolley bus
Streetcar, trolley car, subway, or elevated
Railroad
Bicycle or walked
Taxicab, ferryboat, motorcycle, or other means
Worked at home
Male:
(Repeat MEANS OF TRANSPORTATION TO WORK)
Female:
(Repeat MEANS OF TRANSPORTATION TO WORK)

MEANS OF TRANSPORTATION TO WORK(20) ...... 00sec eee cece cece ee eee eens 20
Universe: Workers 16 years and over

Total

Drove alone

In 2-person carpool

In 3-person carpool

In 4-person carpool

1990 CTPP TABLE OUTLINES-Part A March 15, 1993 Page A-11


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE
Step 5 Determine Average Daily and Peak Hour Travel Times

5.1. Download CTPP Table C-7 (C-6 can also be used and may be preferable
when the travel time distribution is thought to be extremely skewed or to
have outliers). This has already been done and stored in file T-TIMES.
PRN.

Step 6 Graph travel characteristics/urban size relationships and determine the
statistical strength of relationships

6.1 Import trip rates calculated in Step 2.
6.2 Import vehicle occupancies and mode splits calculated in Step 3.
6.3 Import percentages calculated in Step 4.

he Screen Should Look Like This:

Al: (W5] ‘Summary of Ur MENU
Step 5.1 Step 6.1 Step 6.2 Step 6.3 Step 6.4 Quit CS-Menu
Import travel times
A 8 c P} E F G H I
Summary of Urban Area Travel Characteristics

1
2
3 Travel Time

4 (minutes) HBW
Stent ee eee Trips Vehicle Mode Peak to
6
7
8

His Daily Peak per HH Occpney Split Daily

1 50,000 21,739 5.4 5.8 2.70 1.25 0.1% 36.7%
9 2 65,000 29,545 5.3 6.0 2.68 1.36 0.1% 38.2%
10 3 150,000 68, 182 5.7 6.1 2.61 1.30 0.1% 37.4%
"1 4 225,000 107,143 6.3 6.7 2.52 1.27 0.1% 38.3%
12 5S 275,000 125,000 6.6 6.9 2.47 1.31 0.3% 38.7%
3 6 550,000 261,905 7.5 8.5 2.23 1.29 0.8% = 39.8%
4 7 675,000 337,500 7.4 8.7 2.21 1.27 0.9% 39.1%
15 8 850,000 472,222 10.3 12.6 2.06 1.26 © 1.9% 40.2%
16 9 950,000 558,826 11.7 13.3 1.98 1.27 2.0% 9 44.1%
w7
18
vw
20

MD

34


1990 1980
Table Table

Total number
Title of data cells

2-25. N/A

1990 CTPP TABLE OUTLINES—Part 2 August 5, 1993 Page 2-12

In 10-or-more-person carpool
Bus or trolley bus
Streetcar or trolley car
Subway or elevated
Railroad

Ferryboat

Taxicab

Motorcycle

Bicycle

Walked

Other means

MEDIAN TRAVEL TIME(1) IN MINUTES BY MEANS OF TRANSPORTATION(10)

BY TIME OF ARRIVAL AT WORK(7) ... 2... 0 eee see e eee eee e eens

Universe: Workers 16 years and over who did not work at home
Workers who did not work at home:

All arrival times

5:30 a.m. to 6:29 a.m.

6:30 a.m. to 7:29 a.m.

7:30 a.m. to 8:29 a.m.

8:30 a.m. to 9:29 a.m.

9:30 a.m. to 10:29 a.m.

10:30 a.m. to 5:29 a.m.
Drove alone:

(Repeat TIME OF ARRIVAL AT WORK)
In 2-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
In 3-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
In 4-or-more-person carpool:

(Repeat TIME OF ARRIVAL AT WORK)
Bus or trolley bus:

(Repeat TIME OF ARRIVAL AT WORK)
Streetcar, trolley car, subway, or elevated:

(Repeat TIME OF ARRIVAL AT WORK)
Railroad:

(Repeat TIME OF ARRIVAL AT WORK)
Bicycle or walked:

(Repeat TIME OF ARRIVAL AT WORK)
Taxicab, ferryboat, motorcycle, or other means:

(Repeat TIME OF ARRIVAL AT WORK)


1990 1980

Table Table Title

1-9. N/A

1-10. N/A

1-11, 4-1

Total number
of data cells

MOBILITY LIMITATION STATUS(3) BY AGE(11) ..........-0+-

Universe: Persons 16 years and over
Total, mobility limitation status:
Persons 16 years and over
16 and 17 years
18 to 20 years
21 to 24 years
25 to 34 years
35 to 44 years
45 to 54 years
55 to 61 years
62 to 64 years
65 to 74 years
75 years and over
With a mobility limitation:
(Repeat AGE)
No mobility limitation:
(Repeat AGE)

MOBILITY LIMITATION STATUS(3) BY EMPLOYMENT STATUS(6)

Universe: Persons 16 years and over
Total, mobility limitation status:
Total, employment status
In labor force:
In Armed Forces
Civilian:
Employed:
At work
Not at work
Unemployed
Not in labor force
With a mobility limitation:
(Repeat EMPLOYMENT STATUS)
No mobility limitation:
(Repeat EMPLOYMENT STATUS)

SEX(3) BY AGE(12) FOR PERSONS IN HOUSEHOLDS ..........

Universe: Persons in households
Both sexes:
All ages
Under 16 years
16 and 17 years
18 to 20 years
21 to 24 years
25 to 34 years
35 to 44 years
45 to 54 years
55 to 61 years
62 to 64 years

1990 CTPP TABLE OUTLINES—Part 1 August 5, 1993

Page 1-3


1990 1980

A-46, 1-24

1990 CTPP TABLE OUTLINES—Part A

Total number
of data cells

$12,500 to $14,999:

(Repeat MEANS OF TRANSPORTATION)
$15,000 to $17,499:

(Repeat MEANS OF TRANSPORTATION)
$17,500 to $19,999:

(Repeat MEANS OF TRANSPORTATION)
$20,000 to $22,499:

(Repeat MEANS OF TRANSPORTATION)
$22,500 to $24,999:

(Repeat MEANS OF TRANSPORTATION)
$25,000 to $27,499:

(Repeat MEANS OF TRANSPORTATION)
$27,500 to $29,999:

(Repeat MEANS OF TRANSPORTATION)
$30,000 to $32,499:

(Repeat MEANS OF TRANSPORTATION)
$32,500 to $34,999:

(Repeat MEANS OF TRANSPORTATION)
$35,000 to $37,499:

(Repeat MEANS OF TRANSPORTATION)
$37,500 to $39,999:

(Repeat MEANS OF TRANSPORTATION)
$40,000 to $42,499:

(Repeat MEANS OF TRANSPORTATION)
$42,500 to $44,999:

(Repeat MEANS OF TRANSPORTATION)
$45,000 to $47,499:

(Repeat MEANS OF TRANSPORTATION)
$47,500 to $49,999:

(Repeat MEANS OF TRANSPORTATION)
$50,000 to $54,999:

(Repeat MEANS OF TRANSPORTATION)
$55,000 to $59,999:

(Repeat MEANS OF TRANSPORTATION)
$60,000 to $74,999:

(Repeat MEANS OF TRANSPORTATION)
$75,000 to $99,999:

(Repeat MEANS OF TRANSPORTATION)
$100,000 to $124,999:

(Repeat MEANS OF TRANSPORTATION)
$125,000 to $149,999:

(Repeat MEANS OF TRANSPORTATION)
$150,000 or more:

(Repeat MEANS OF TRANSPORTATION)

MEDIAN HOUSEHOLD INCOME(1) BY MEANS OF TRANSPORTATION TO WORK(11)

FOR WORKERS INHOUSEHOLDS .......... cece ee eens
Universe: Workers 16 years and over in households

Total
Drove alone

March 15, 1993

Page A-18


CASE STUDY: TRAVEL DEMAND CHARACTERISTICS BY URBAN AREA SIZE
TRIP RATE SCATTERPLOT

HOME BASED WORK PERSON TRIP RATES

28

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8 °
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* 22b ° o

ark

°
2b
°
19 A 1 1 ne
° 02 04 08 1
uitiions)
POPULATION
Exhibit CS-A-3

37