DOE/EIA-0207/4

DEC 1 5 1980

Residential Energy Consumption Survey:

Consumption Patterns 

of Household Vehicles, 

June to August 1979 ,

June 1980

U.S. Department of Energy

Energy Information Administration

Assistant Administrator for Program Development

Office of the Consumption Data System
Other NIECS Reports

Preliminary Conservation Tables from the National Interim Energy Con 

sumption Survey, August 1979, DOE/EIA-0193/P

Characteristics of the Housing Stocks and Households; Preliminary 

Findings from the National Interim Energy Consumption Survey, 

October 1979, DOE/EIA-0199/P

The above reports are available from the following address:

U.S. Department of Energy 

Technical Information Center 

Attn: EIA Coordinator 

P.O. Box 62 

Oak Ridge, Tennessee 37830

Residential Energy Consumption Survey: Conservation, February 1980, 

DOE/EIA-0207/3, GPO Stock No. 061-003-00087-8; $6.00

Single Family Households; Fuel Oil Inventories and Expenditures: 

National Interim Energy Consumption Survey, December 1979, 

DOE/EIA-0207/1, GPO Stock No. 061-003-00075-4, $1.75

Residential Energy Consumption Survey; Characteristics of the Housing 

Stock and Households, GPO Stock No. 061-003-00093-2; $4.25

Residential Energy Consumption Survey: Consumption and Expenditures, 

April 1978 Through March 1979, July 1980, DOE/EIA-0207/5, 

GPO Stock No. 061-003-00131-9; $6.50

The above reports are available from the following address:

Superintendent of Documents 

U.S. Government Printing Office 

Washington, D.C. 20402
DOE/EIA-0207/4

Residential Energy Consumption Survey:

Consumption Patterns 

of Household Vehicles, 

June to August 1979

June 1980

U.S. Department of Energy

Energy Information Administration 

Assistant Administrator for Program Development 

Office of the Consumption Data System 

Washington, D.C. 20585
This publication is available from the Superintendent of 

Documents, U.S. Government Printing Office. An order form is 

enclosed for your convenience. Send order form and payment to:

Superintendent of Documents 

U.S. Government Printing Office 

Washington, D.C. 20402

Order Desk (202) 783-3238

Stock Number: 061-003-00156-4 

Price: $3.75

For questions on energy statistics or information on availability 

of other EIA publications, contact:

U.S. Department of Energy

Energy Information Administration

Office of Energy Information Services, El-60

Forrestal Building

Mail Stop 1F048

Washington, D.C. 20585

(202) 252-8800

Released for printing November 26, 1980.
PREFACE

This is the first in a series of quarterly reports presenting data from 

the Household Transportation Panel. This report contains data for June, 

July, and August 1979 on the use of household vehicles. The tables 

include both average and aggregate transportation statistics crossclassified by vehicle characteristics (size, age, fuel typically used), 

and household characteristics (urban/rural, income, one- versus multivehicle, number of drivers, household size). Data on the fuel purchasing 

situation motorists encountered in these months are also provided. 

Included in the report are: a summary of findings; a description of how 

the survey was conducted; a copy of the fuel purchase log, the background 

questionnaire, and the gas lines questionnaire; an explanation of the 

relative standard errors for total sample estimates; and a glossary.

This report was prepared by the Office of the Consumption Data System, 

Office of Program Development, Energy Information Administration. The 

following staff members contributed to this project: Kenneth Vagts 

Director, Office of the Consumption Data System; Lynda Carlson Acting 

Director of the Residential and Commercial Data Systems Division; 

Wendel Thompson manager of the residential energy consumption surveys; 

Bruce Egan transportation panel manager; Les Whitaker and 

Mike Maloney computer programmers; Jay Beder and Kathy Perez-Lopez 

statisticans; Julie Withers editor; Diane Whited and Dotty Tate 

secretarial support. The survey fieldwork was conducted by Response 

Analysis Corporation under the direction of Reuben Cohen and Dawn Day, 

with programming consultation by Richard Cann. Statistical design 

support was provided by Joseph Steinberg of Survey Design, Inc.
CONTENTS

Page

Consumption Patterns of Household Vehicles ...................... 1

Fuel Consumption .............................................. 1

Miles Per Gallon (MPG) ........................................ 1

Miles Driven .................................................. 1

Fuel Expenditures ............................................. 1

Price ......................................................... 1

Inventory ..................................................... 2

Averages Per Household ........................................ 2

Gasoline Lines ................................................ 2

Relative Standard Errors ........................................ 19

How the Survey Was Conducted .................................... 35

Introduction .................................................. 35

Sample Selection .............................................. 35

Survey Operations ............................................. 36

Data Processing ............................................... 37

Estimation .................................................... 37

Response Rates ................................................ 38

Appendix

A. Fuel Purchase Survey Log .................................. 41

B. Fuel Purchase Survey Instructions ......................... 45

C. Background Questionnaire .................................. 47

D. Gas Lines Questionnaire ................................... 53

Glossary ........................................................ 55
TABLES

1. Monthly U.S. Household Transportation Data 1979 Averages ..... 3

2. Monthly U.S. Household Transportation Data Averages for

June 1979 by Vehicle Characteristics .......................... 4

3. Monthly U.S. Household Transportation Data Averages for

July 1979 by Vehicle Characteristics .......................... 5

4. Monthly U.S. Household Transportation Data Averages for

August 1979 by Vehicle Characteristics ........................ 6

5. Monthly U.S. Household Transportation Data Averages for

June 1979 by Household Characteristics ........................ 7

6. Monthly U.S. Household Transportation Data Averages for

July 1979 by Household Characteristics ........................ 8

7. Monthly U.S. Household Transportation Data Averages for

August 1979 by Household Characteristics ...................... 9

8. Monthly U.S. Household Transportation Data 1979 Totals ....... 10

9. Monthly U.S. Household Transportation Data Totals for

June 1979 by Vehicle Characteristics .......................... 11

10. Monthly U.S. Household Transportation Data Totals for

July 1979 by Vehicle Characteristics .......................... 12

11. Monthly U.S. Household Transportation Data Totals for

August 1979 by Vehicle Characteristics ........................ 13

12. Monthly U.S. Household Transportation Data Totals for

June 1979 by Household Characteristics ........................ 14

13. Monthly U.S. Household Transportation Data Totals for

July 1979 by Household Characteristics ........................ 15

14. Monthly U.S. Household Transportation Data Totals for

August 1979 by Household Characteristics ...................... 16

15. Monthly U.S. Household Transportation Data Gasoline Lines .... 17

16. Monthly U.S. Household Transportation Data Relative

Standard Errors (Percents) for June, July, and August 1979

Averages ...................................................... 20

17. Monthly U.S. Household Transportation Data Relative 

Standard Errors (Percents) for June 1979 Averages by 

Vehicle Characteristics ....................................... 21

18. Monthly U.S. Household Transportation Data Relative 

Standard Errors (Percents) for July 1979 Averages by 

Vehicle Characteristics ....................................... 22

19. Monthly U.S. Household Transportation Data Relative 

Standard Errors (Percents) for August 1979 Averages 

by Vehicle Characteristics .................................... 23

20. Monthly U.S. Household Transportation Data Relative 

Standard Errors (Percents) for June 1979 Averages by 

Household Characteristics ..................................... 24
21. Monthly U.S. Household Transportation Data Relative 

Standard Errors (Percents) for July 1979 Averages by 

Household Characteristics ..................................... 25

22. Monthly U.S. Household Transportation Data Relative 

Standard Errors (Percents) for August 1979 Averages 

by Household Characteristics .................................. 26

23. Monthly U.S. Household Transportation Data Relative

Standard Errors (Percents) for June, July, and August 1979

Totals ........................................................ 27

24. Monthly U.S. Household Transportaton Data Relative 

Standard Errors (Percents) for June 1979 Totals by 

Vehicle Characteristics ....................................... 28

25. Monthly U.S. Household Transportation Data Relative 

Standard Errors (Percents) for July 1979 Totals by 

Vehicle Characteristics ....................................... 29

26. Monthly U.S. Household Transportation Data Relative 

Standard Errors (Percents) for August 1979 Totals by 

Vehicle Characteristics ....................................... 30

27. Monthly U.S. Household Transportation Data Relative 

Standard Errors (Percents) for June 1979 Totals by 

Household Characteristics ..................................... 31

28. Monthly U.S. Household Transportation Data Relative 

Standard Errors (Percents) for July 1979 Totals by 

Household Characteristics ..................................... 32

29. Monthly U.S. Household Transportation Data Relative 

Standard Errors (Percents) for August 1979 Totals by 

Household Characteristics ..................................... 33
CONSUMPTION PATTERNS OF HOUSEHOLD VEHICLES

This is the first report of an ongoing statistical series that will 

provide quarterly data on the residential sector concerning fuel 

consumption, miles per gallon, and miles driven. This report provides 

survey data for the June, July, and August 1979 Household Transportation 

Panels (see "How the Survey was Conducted") for the 48 contiguous 

States and the District of Columbia.

The statistical precision of the data is described in the section on 

Relative Standard Errors (see page 19). In general, statistical 

estimates from month to month do not vary significantly. Therefore, 

unless specifically noted, all data in this summary are for June only.

Fuel Consumption

An estimated 6.4 billion gallons of gasoline and diesel vehicle fuel 

(5.1 million barrels per day) were purchased by households nationwide 

in June. For the average vehicle, approximately 53 gallons of fuel 

were purchased in that month.

Miles Per Gallon

Household vehicles showed an estimated average efficiency of approximately 

15 miles per gallon in June.

Miles Driven

The nation's households drove an estimated 91.5 billion miles in June, 

or 759 miles per household vehicle. This represents 71 percent of 

the estimated 128.9 billion miles traveled by all vehicles in the 

United States as reported by the Federal Highway Administration (FHWA) 

in Table 3 of the December 1979 Traffic Volume Trends report. 1

Fuel Expenditures

Overall expenditures for household vehicles were $5.6 billion in June, and 

the national average expenditure was approximately $46 per vehicle.

Although a comparison between the FHWA data base on total miles 

traveled and the DOE data base on household vehicle miles traveled is 

inevitable, caution must be exercised when doing so since the two 

data bases are not strictly comparable.
Price

 '.->'

Nationwide, the price of fuel averaged 87.5 cents in June, 92.4 cents 

in July, and 96.1 cents in August (their relative standard errors are, 

respectively, .5 cents, .4 cents, and .4 cents). Thus, the increase 

of 8.6 cents from June to August is significantly different from zero. 

(As shown in the Relative Standard Errors section, the increase has a 

standard error of no more than .8 cents).

Data from the Bureau of Labor Statistics shows comparable prices of 

88.0 cents, 93.0 cents, and 96.7 cents for June, July, and August, respec 

tively.

Data frodT the September 1980 issue of the Energy Information Administration 

publication, Monthly Energy Review, (DOE/EIA-0035), also shows similar 

prices of 87.9 cents for June, 92.6 cents for July, and 96.7 cents for 

August.

Inventory

 * 

The average tank was kept approximately 63 percent full during June.

A monthly average of 1.5 billion gallons of fuel was stored in vehicle 

tanks during June. (This figure will be used as a basis for comparison 

with future months of data to determine fluctuations in the inventory 

of fuel stored in vehicle tanks.)

Averages Per Households

Average consumption per vehicle statistics can be converted into 

averages per household by using the number of vehicles per household 

as a multiplication factor. For example, 52.9 gallons were purchased 

on the average for a household vehicle in June 1979. This figure can 

be converted to 95.2 gallons purchased for the average household, by 

multiplying the average number of vehicles per household (1.8) by the 

average lumber of gallons purchased per vehicle (52.9)2.

Gasoline Lines

In June 1979, 40 percent of the households surveyed had waited in 

gasoline lines; the average longest wait was 49 minutes. In July, this 

declined to 25 percent of the households sampled, and the average 

longest waiting time had decreased to 27 minutes. In August, only 10 

percent of the panel households waited in line, and the average longest 

wait was down to 20 minutes.

^Approximately 88 percent of the households in the United States 

have the use of one or more vehicles.
TABLE 1. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA - AVERAGES

MONTH

JUN 

 79

I JUL 

I '79 |

AUG 

«79

I SEP 

'79

I CCT 

| «79

1 1

| NOV I DEC

| «79 | 79

___________________________________i_____1_____1_____1_____. 

AVERAGES PER VEHICLE

Cl \ 

GALLONS PURCHASED................... 52.9 52.4 52.3 > -

GALLONS CONSUMED.«.................. 51.1 53.3 51.9^

WILTS DRIVEN........................ 758.8 799.8 760.4

EXPfA'OITURF.S (OCLLARSJ.............. 46.3 48.4 50.2

FUEL INVENTORY AS A PERCENT 

OF TANK CAPACITY................... 63.1 62.9 61.4

FU r L TANK CAPACITY (GALLON'S)........ 19.4 19.5 19.9

AVERAGES PER GALLON

PRICE (CENTS PEP. GALLON)

ALL FUELS......................... 87.5 92.4 96.1

LEADED FUEL..................... 65.2 90.3 94.1

PREMIUM....................... 90.9 96.1 101.1

REGULAR................ ...... 34.5 89.7 93.2

UNLEADED FUEL................... 89.7 94.7 98.4

v Hr; S PER GALLON... ................. 14.8 15.0 14.6

NUMBER OF VEHICLES PER HOUSEHOLD...... l.R 1.8 1.8

BILLIONS OF GALLONS IN TANKS.......... 1.5 1.5 1.5

.J_____J_____1_.

1

1 JAN 

| 80 

|

1

1 FEB 

| '80 

1

1

| MAR 

| '80 

1

I

I APR

j '80

_i___

1 MAY

1 '80

- OATA NCT AVAILABLE.

: HCUStHCLO TRANSPORT.IT ION PANEL, RESIUENT I At ENERGY CONSUMPTION SURVEY, 

OFFICE OF THE CONSUMPTION OATS SYSTEM, 

OFFICE OF PhCGPAM DEVELOPMENT, ENERGY INFORMATION ADMINISTRATION.
TABLE 2. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA - AVERAGES FOR JUNE 1979 BY VEHICLE CHARACTERISTICS

VEHICLE SIZb MODEL YEAR

TOTAL 1 | 

INTERMECJATEI COMPACT 1975 | 1974 

AND I AND TO | AND 

FULL SIZF ISUBCOMPACT 1979 [EARLIER 

___ __ _____ ____ii I i 1 J

AVERAGES PER VEHICLE 

OALLtNS PUfcCl-ASEO. ...............

EXPENDITURES (OC-LLARSI ...........

FUFL INVENTORY AS A PFRCENT

AVERAGES PER GALLON

PRICE ICENTS PER GALLON) 

ALL FLFLS. .....................

UNLEADED FUEL................

BILLIONS OF GALLONS IN TANKS.......

52.9

51.1

... 756.8

63.1

P.7.5

85.2

84.5

89.7

14.8

1.5

59.4 

57.0 

758.6 

51.9

64.2 

22.2

87.4 

84.9 

90.5 

84.2 

89.4

13.3 

.9

42.9 63.4 44.2 

41.8 61.8 42.2 

780.3 971.0 581.8 

38.0 56.2 38.1

61.8 64.9 61.2 

15.4 19.5 19.3

88.5 88.6 66.1 

86.6 84.2 85.4 

92.0 92.9 90.8 

85.6 83.7 84.7 

90.4 89.6 91.5

18.7 15.7 13.8 

.4 .7 .8

FUEL USED

1 1

1 I OTHER 

LEADED (UNLEADED) AND 

1 (UNKNOWN 

1 1

47.5 59.4 56.9 

45.7 57.2 55.7 

636.2 907.9 841.5 

40.7 53.0 50.1

62.2 66.4 59.2 

19.3 19.5 19.7

13.9 15.9 15.1 

.7 .5 .2

SOlJFCE: hOLStHCLD TRANSPCRTATIGN PANEL, PESIDENTIAL ENERGY CONSUMPTION SURVEY,

OFFICF OF THE CONSUMPTION DATA SYSTEM,

CFFICF OF PRCGRA," DEVELOPMENT, ENERGY INFORMATION ADMINISTRATION.
TABLE 3. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA - AVERAGES FOR JULY 1979 BY VEHICLE CHARACTERISTICS

ui

AVERAGES PER VEHICLE

GALLONS CONSUMED..............

MILES DRIVEN..................

FUEL INVENTORY AS A PERCENT

FUEL TANK CAPACITY (GALlChS)..

AVERAGES PER GALLON

PRICE (CENTS PER GALLON) 

ALL FUELS...................

REGULAR.................

JMLES PER GALLON..............

BILLIONS OF GALLONS IN TANKS....

TCTAL 

_____ i __ .

...... 52.4

...... 53.3

...... 798.8

L. ft L.

...... C 6.l

...... BS.7

...... 94.7

...... 1.5

VEHICLE 

—————————— j"

INTERMEDIATE! 

AND I 

FULL SlZf 1

.1 _ _ __1

59.7 

60.9 

806.0 

55. J

63.1 

22.3

92,2

95.8 

39.2 

94.3

13.2

.9

SIZF

COMPACT 

AND 

SUBCOMPACTI

.-- 1

MODEL

1975 

TO 

1979

42.4 63.8 

42.8 64.8 

837.1 1029.2 

39.6 59.7

62.8 64.6 

15.3 19.5

93.5 93.7 

91.3 90.1 

96.8 94.1 

90.7 89.8 

95.5 94.8

19.6 15.9 

.4 .7

YEAR

1 

1 1974 

1 AND

IEARLIER 

1 _. .,

42.8 

43.5 

599.1

38.8

61.2 

19.6

90.7 

90.4 

96.6

89.6 

93.5

13.8

.8

FUEL USED

1 1

1 I OTHER 

LEADED lUNLEAOEOl AND 

| (UNKNOWN 

J- - 1

45. t 60.7 

46.2 62.0 

650.7 969.2 

41.5 57.5

62.2 64.4 

19.5 19.9

14.1 15.6 

.7 .5

56.1 

57.1 

900.7 

51.5

61.4 

16,8

15.3 

.3

SOURCE: HOUSEHOLD TRANSPORTATION PANEL. RESIDENTIAL ENERGY CONSUMPTION SURVEY,

OFFICE OF THE CONSUMPTION DATA SYSTEM,

OFFICE OF PRCGRAi* CFVELCFKENT, ENLRGY INFORMATION ADMINISTRATION.
TABLE *. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA - AVERAGES FOR AUGUST 1979 BY VEHICLE CHARACTERISTICS

CT\

VEHICLE SIZE MODEL

_. .... __

TCTAL 1 1 

INTFRMEDIATEl COMPACT 1975 1 

AND 1 AND TO | 

FULL SIZF ISUBCOMPAC.T 1979 | 

______ ___ __ _ 1 i -I i i

AVERAGES PER VEHICLE 

HALLCNS PJ«OAS C C........... .....

GALLONS CCMSUTO........ .........

f-UCL INVENTORY 4S A PC?CENT 

OF TANK CAPACITY... .............

AVERAGES PER GALLON

PRICE (CENTS PER GALLON) 

ALL FULLS......................

LEACE!) FUEL..................

PKE^IJI. ...................

BILLIONS OF GALLONS IN TANKS.......

52.3 58.8 40,8

... 51. 36.2 40.5

... 76ft. 4 739.6 8*58.6

... 50.2 5fc.L 39.3

... 61.4 ol.2 63.1

... 19.9 22.7 15.0

... 9t.l 96.2 96.3

94.1 94.2 94.5

... 101.1 IU0.2 102.0

... 93.2 93.4 93.4

9 fl 4 C 3 4 98. 0

... 14.6 12.7 20.0

1.5 .9 .4

63.8 

63.6 

978.3 

62.2

61. 9 

20. 1

97.5 

94.2 

102.6 

93.6 

98.7

15.4 

.7

YEAR FUEL USED

t 1 

1974 I 1 OTHER 

AND LEADED lUNLEADEDJ AND 

EARLIER | I UNKNOWN 

1 1 J

42.5 45.1 

42.1 44.8 

573.9 o31.9 

40.1 42.7

60.9 61.7 

19.9 20.2

94.3 

94.1 

100. S 

93.0 

94.5

13.6 14.1 

.8 .8

61.3 57.8 

60.5 58.2 

893.7 906.5 

60.2 55.3

62. A 58.5 

20.4 18.4

14.8 15.6 

.5 .2

SOURCE: HOUSEHOLD T 1?ANSPC^TAT IC\ PANEL, RESIDENTIAL ENERGY CONSUMPTION SUPVEYt

'JFFICF OF THE CCNSUK'PTICN DATA SYSTE*,

TFFICF CF PPCG,<AV CEVELCFWENT, ENFRCY INFCRMATICK ADMINISTRATION.
TABLE 5. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA - AVERAGES FOR JUNE 1979 BY HOUSEHOLD CHARACTERISTICS

TOTAL

HOUSEHOLD 

LOCATION

1 

1

URBAN | RURAL 

AREAS (AREAS 

1 

]

FAMILY INCOME

1 

LESS 1 

THAN | ABOVE 

$15,000|$15,000 

1 

I ]

NUMBER OF 

VEHICLES 

USED 3Y 

HOUSEHOLD

1

ITWQ OR

ONE j MORE 

VEHICLE | VEHI1 CLES

1

NUMBER OF 

DRIVERS 

IN HOUSEHOLD

__._..___.

I 

I 3 OR 

1 TO 2 | MORE 

DRIVERS (DRIVERS 

1 

I

NUMBER OF 

HOUSEHOLD 

MEMBERS

1 

I 3 OR 

1 TO 2 | MORE 

MEMBERSJMEMBERS 

1

L \

AVERAGES PER VEHICLE

FUEL INVENTORY AS A PERCcNT

UF TANK CAPACITY... ............

AVERAGES PER GALLON

1 

PRICE (CENTS ?E* GALLON)

ALL FUELS.....................

PREMIUM....... ............

BILLIONS OF GALLONS IN TANKS......

52.9

51.1

.. 758.3

46 . 3

63.1

19.4

87.5

85.2

90.9

94.5

1.5

52.4

50.5

737.5

46.2

63.6

19.2

88.3

86.0

91.5

85.1

90.4

14.6

1.0

54.2

52.3

303.4

46.4

61.8

19.8

85.7

83.6

88.4

83.4

88.2

15.3

.5

45.1

43.6

618.1

39.3

62.3

19.9

87.1

85.2

90.9

84.5

88.7

14.2

.5

57.1

55.1

832.4

50.0

63.4

19.1

87.6

85.1

91.0

84.4

90.0

15.1

.9

55.0

52.4

825.4

48.6

65.6

19.3

88.4

85.9

89.7

85.5

90.3

15.7

.4

52.3

50.7

736.3

45.5

62.?

19.4

87.1

84.9

91.3

84.1

89.5

14.5

1.1

52.5

50.7

744.3

46.0

63.?

19.4

87.7

85.3

91.2

84.6

90.0

14.7

1.1

55.1

53.3

318.6

47.8

62.6

19.3

86.7

84.6

89.8

84.1

88.9

15.4

.3

47.8

45.8

706.3

41.9

65.4

19.0

87.7

85.1

92.6

84.4

90.0

15.4

.6

56.6

54.9

796.3

49.4

61.5

19.7

87.3

85.2

90.3

84.5

89.6

14.5

.8

SOURCt: HOUSEHOLD TRANSPORTATION PANELt RESIDENTIAL ENERGY CONSUMPTION SURVEYt 

OFFICE OF THE CONSUMPTION DATA SYSTEMt 

OFFICE OF PROGRAM DEVELOPMENT ENERGY INFORMATION ADMINISTRATION.
TABLE 6. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA - AVERAGES FOR JULY 1979 BY HOUSEHOLD CHARACTERISTICS

TOTAL

HOUSEHOLD 

LOCATION

1 

1

URBAN | RURAL 

AREAS IAREAS

1 1

FAMILY INCOME

1

LESS I 

THAN | ABOVE 

$15,000|$15,000

1 

I

NUMBER OF 

VEHICLES 

USED 8Y 

HOUSEHOLD

1

ITWO OR

ONE | MORE 

VEHICLE I VEHI1 CLES 

1

NUMBER OF 

DRIVERS 

IN HOUSEHOLD

1 

1 3 OR 

1 TO 2 | MORE

DRIVERS (DRIVERS 1

NUMBER OF 

HOUSEHOLD 

MEMBERS

1 

I 3 OR 

I TO 2 | MORE 

MEMBERSIMEMBERS 

1 

j

AVERAGES PER VEHICLE

oo

MILES OKlVtN.. .................

FUEL INVtNTQRY AS A PSRCENT

OF IANK CAPACITY..............

FU L TANK CAPACITY (GALLONS)...

AVERAGES PER GALLON

PRICE (CENTS PiiR SALLUM)

ALL FUELS....................

PRcMIUM..................

MlLt^ »ER GALLON. ..............

BILLIONS OF GALLONS IN TANKS....,

.... 52.4

.... 53.3

, ... 798.8

.... 62.3

.... 19.5

.... 92.4

.... 90.3

.... 96.1

.... 94.7

.... 15.0

. ... 1.5

50.7

51.3

759.9

47.2

6?. 6

19.3

93.0

91.1

97.3

90.3

94.9

14.8

1.0

56.4

57.9

887.0

51.4

61.0

20.0

91.1

89.0

93.3

38.6

94.0

15.3

.4

44.8

45.1

655.9

41.1

63.5

19.7

91.7

90.2

97.1

89.3

93.8

14.5

.5

56.5

57.6

873.7

52.3

62.5

19.4

92.7

90.4

95.7

89.8

95.0

15.2

1.0

51.2

52.0

794.6

47.8

65.8

19.7

93.3

91.0

96.1

90.3

95.1

15.3

.4

52.9

53.7

300.1

48.7

61.8

19.4

92.1

90.1

96.2

89.5

94.5

14.9

1.1

51.7

52.4

787.6

47.9

62.8

19.4

9?. 7

90.7

96.7

90.0

94.9

15.0

1.2

55.7

56.9

847.0

50.7

62.9

19.7

91.2

89.1

93.9

88.7

93.7

14.9

.3

46.3

46.7

716.4

43.1

65.8

19.5

93.0

90.7

96.5

89.9

95.1

15.3

.7

57.1

58.3

861.9

52.5

60.5

19.5

92.0

90.1

95.9

89.5

94.4

14.8

.8

SOUMCt: HUUS£HOLD TRANSPORTATION PANELt RESIDENTIAL ENERGY CONSUMPTION SURVEYt 

OFFICE -IF Ti-lt CONSUMPTION DATA SYSTEM, 

Cf-FICfc UF POGKAM DEVtLJPMENT, ENERGY INFORMATION AOMINISTRATION.
TABLE 7. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA - AVERAGES FOR AUGUST 1979 BV HOUSEHOLD CHARACTERISTICS

TOTAL

HOUSEHOLD 

LOCATION

1 

I

URBAN' 1 RURAL 

ARFAS (AREAS 

1

1

FAMILY INCOME

1

LESS | 

THAN | ABOVE 

$15tOOO|$l5,000 

1 

1

NUMBER OF 

VEHICLES 

USED BY 

HOUSEHOLD

1

(TWO 3R 

ONE | MORE 

VEHICLE I VEHI1 CLES

1

NUMBER OF 

DRIVERS 

IN HOUSEHOLD

1

1 3 OR 

1 TO 2 \ MORE 

DRIVERS (DRIVERS 

1 

1

NUMBER OF 

HOUSEHOLD 

MEMBERS

\

I 3 OR 

1 TO 2 | MORE 

MEMBEKSIMtMBERS 

1 

1

AVERAGES PER VEHICLE

vo

FU5L INVENTORY AS A PiRCCNT

AVERAGES PER GALLON

PRICE (CENTS PER GALLON*

BILLIONS OF GALLONS IN TANKS......

51.0

. . 760 .4

50.2

61.4

19.9

94.1

101.1

93.?

1.5

50.8

50.7

739.6

49.0

62.5

19.0

96.4

94. 3

ior>.?

93.4

9*. 7

14.6

1.1

55.6

54.9

312.0

53.?

58.8

20.2

95.3

93.8

102.9

92.8

97.4

14.8

.4

48.9

47.7

715.3

46.5

61.8

19.6

95.1

93.7

100.5

93.2

97.8

15.0

.5

54.1

54.2

784.9

52.2

61.2

20.1

96.6

94.3

101.2

93.?

98.6

14.5

1.0

46.4

45.3

662.V3

44.6

65.3

19.7

96.2

93.7

98.7

93.?

98.3

14.6

.4

54.2

54.1

790.1

52.1

60.3

20.1

96.1

94.?

101.6

93.?

98.4

14.6

1.1

49.1

48.7

722. o

47.4

6?.l

19.9

<>6.4

04.6

101.1

 3.6

98.4

14.8

1.2

63.6

63.6

896.4

60.6

58.6

20.0

95.2

92.9

101. 1

92.1

98.3

14.1

. 3

45.8

45.1

fc54.«d

44. 1

65.4

20. 0

96.3

94.5

102. 6

93.4

98.7

14.5

.7

57.4

57.3

844. 1

55.0

58.3

19.9

95.9

9i.9

100.2

93.0

98.1

14.7

.8

IBURCt: HOUSEHOLD THAMS^OKTAI 10N ANEL, RESIDENTIAL ENERGY CONSUMPTION SURVEY,

OFFICE TF THE CONSUMPTION DATA SYSTcM,

OFFICE JF PJOGKAM UfcVEL3 p MFNT, ENERGY INFORMATION ADMINISTRATION.
TABLE 10. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA - TOTALS FOR JULY 1979 BY VEHICLE CHARACTERISTICS

TOTAL

VEHICLE S12£

-.-

INTERMEDIATE I CCfPACT i

ANU i AND (UNKNOWN I 

FULL SIZE ISUBCOMPACTI I

 4QOEL YEAR FUEL OSEO

U.S. TOTALS BY MONTH

MILES OfUVt.S (41 LLI'JUSl ............. *C.5 W.I

EXPENDITURES (BILLIONS OH DOLLARS)

ALL FULLS......................... 5.9 3.4

LLADEJ FJELS.................... 2.1 1.4

'JNLtADtJ FJELS....... ........... 2.3 1.8

FUEL, UNKNJwN S 31 LSc'L.......... .3 .2

GALLONS PUKCHASLJ ISILLIJNS)

ALL FUELS. ........................ 6.3 3.7

LEADEJ FULLS.................... 3.0 1.6

UNLEA3EU FUtLS.................. 3.0 1.9

FJcL, JNKNJnN £ JltSEL.......... .3 .2

NUMBER OF VEHICLES I A ILL IONS)....... 120.8 62.0

35.4

1.7 

.7

.V 

.1

i.a

.8 

.9 

.1

42.2

U.2

.a

.6 

.2

.0

.9 

.6 

.2 

.0

16.6

1975

TO 

1979

57.5

3.3

.6

2.6

.1

3.6

.7

2.7

.1

55.8

1974

AND

EARL1EK

I

I UNKNOWN

I

I CTH6R

LEAOEQ I UNLEADED I AMD

- DATA *uT AVAlLAbLC.

SOURCE: HOJSEHOLJ TRANSPUTTAT1Crt PANEL, RESIJENTJAL ENERGY CONSUMPTION SURVEY,

UFFlCfc" OF THE CONSUMPTION UATA SYSTEM,

OfFICc UF PKOGKAM JEVELOPMEN7, ENERGY IMFaftMATJON ADMINISTRATION.

38.5

2.5

2.1

.2

.2

2.d

2.3

.2

.2

63.7

0.6

.0

.0 

.0

.0 

.0 

.0

1.3

I (UNKNOWN

J_______

39.0

2.5

2.1

.2

.2

59.9

37.5

2.2 

.2

2.0

.0

20.0

1.1

.6 

.1

38.7 22.2
TABLE 11. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA - TOTALS FOR AUGUST 1979 BY VEHICLE CHARACTERISTICS

TOTAL

VEHICLE SIZE

I I 

INTERMEDIATE| COMPACT I

AND I AND (UNKNOWN 

FULL SIZE JSUBCOMPACTI 

__________I_________I_____

MODEL YEAR

I

1975

TO 

1979

I

I 1974

I AND (UNKNOWN

(EARLIER I

I

.1. J_

FUEL USED

I I 

I I OTHER 

LEADED (UNLEADED) AND

j jUNKNOWN 

_______L_______LU.S. TOTALS BY MONTH

MILES DRIVEN (BILLIONS)............. 92.0 46.0

EXPENDITURES (BILLIONS OF DOLLARS)

ALL FUELS......................... 6.1 3.5

LEADED FUELS.................... 2.9 1.6

UNLEADED FUELS.................. 2.7 1.6

FUEL, UNKNOWN 6 DIESEL.......... .6 .3

GALLONS PURCHASED (BILLIONS)

ALL FUELS......................... 6.3 3.7

LtADEO FUELS.................... 3.0 1.7

UNLEADED FUELS.................. 2.7 1.6

FUEL, UNKNOWN £ DIESEL.......... .6 .3

H NUMBER OF VEHICLES (MILLIONS)....... 121.0 62.2 U)

33.7

1.6 

.8 

.3 

.0

1.7 

.8 

.8 

.0

41.6

12.4

.9 

.5 

.2 

.2

1.0 

.5 

.2 

.2

17.2

54.8

3.5

.8

2.5

3.6 

.8

2.5 

.3

56.1

36.8

2.6

2.1

.2

.3

2.7

2.2

.2

.3

64.0

0.4

.0 

.0 

.0

.0 

.0 

.0

39.6

2.7

2.1

.2

.4

62.7

- DATA NOT AVAILABLE.

SOURCE: HOUSEHOLD TRANSPORTATION PANEL, RESIDENTIAL ENERGY CONSUMPTION SURVEY,

OFFICE OF THE CONSUMPTION DATA SYSTEM,

OFFICE OF PROGRAM DEVELOPMENT, ENERGY INFORMATION ADMINISTRATION.

32.2

2.2 

.2

1.9 

.1

36.0

20.2

1.2 

.6 

.5 

.1

22.3
TABLE 12. MONTHLY U.S. HOUSEHOLD TRANSPORTATION CATA - TOTALS FOR JUNE 1979 BY HOUSEHOLD CHARACTERISTICS

TCTflL

L _

HOUSEHOLD 

LOCATION

1 

1

URBAN) RURAL 

AREAS! AREAS 

1

1

FAMILY INCOME

1 

LESS 1 

THAN I ABOVE 

$15,OOOI$15,000 

1 

1 1

NUMBER OF 

VEHICLES 

USED BY 

HOUSEHOLD

I

IT WO CR 

ONE j MORE 

VEHICLE J VEHI1 CLES

[ 1

NUMBER OF 

DRIVERS 

IN HOUSEHOLD

1 TO 2 

DRIVERS

3 OR 

MORE 

DRIVERS

NUMBER GF 

HOUSEHOLD 

MEMBERS

1

1 3 OR 

1 TO 2 1 MORE 

MEMBERS 1 MEMBERS 

1

U.S. TOTALS BY MONTH

EXPENDITURES (BILL 

ALL FUELS.......

LfACFo i-uas..

UNLEAOtC FUELS

FUEL, UNKMC^N

GALLONS PURCHASED 

ALL FUELS.......

LEAPEO FUFUS..

UNLEACEC FUELS

P ' i F i 1 1 ^ ' k" v n i* v

MJWBEK OF VEHICLES

ICNS LF OCLLAFS)

£ DIESEL.......,.,

( BILL IONS 1

d OIESEL.. ........

5.6

2.7

2.6

.3

6.4

3.1

2 C

.3

, 120.6

3.8

1.8

1.8

,2

4.3

2.0

2.0

.2

81.6

1.8

.9

.8

.1

2.1

1.1

Q

.1

39,1

1.6

.9

.6

.1

1.9

1.1

.7

.2

4.0

1.8

2.1

.1

4.5

2,1

2 -a

.1

79.2

1.5

.6

.8

.1

1.7

.7

.9

.1

30.5

2.1

1.8

.2

4.7

2.4

2.0

.2

90.1

2.0

2.0

.2

4.8

2.4

2.2

.2

92.0

1.3

.6

.6

.1

1.5

.6

.7

.1

28.0

2.1

.9

1.1

.1

2.4

1.1

1.2

.1

50.2

3.5

1.7

1.6

.2

4.0

2.0

1.7

.2

70.4

SOURCE: FCUSEHCLD TRANSPORT tJ ICI'L PANfcLt RtSIDENTIAL ENeRCY CCNSUKPTIGN SURVEYt

CPF1CE TF THE C.CNSUI»PTICHi DATA SYSTEM,

CfFICE CF PftCGWAM DEVELCPMEM, ENERGY INFCPMATIOK ADMINISTRATION.
TABLE 13. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA - TOTALS FOR JULY 1979 BY HOUSEHOLD CHARACTERISTICS

J

TCTAL

L_ _ j

HOUSEHOLD 

LOCATION

1 

1 

URBANl RURAL 

AREASI AREAS

1

L i_ _J

FAMILY INCOME

1 

LESS 1 

THAN I ABOVE 

115,000|$15,000 

1 

1

NUMBER OF 

VEHICLES 

USED BY 

HOUSEHOLD

1 

(TWO CR 

ONE I MORE 

VEHICLE I VEHI1 CLES 

J

NUMBER OF 

DRIVERS 

IN HOUSEHOLD

1 

1 3 OR 

1 TO 2 | MORE 

DRIVERS (DRIVERS

1 

1 1

NUMBER CF 

HOUSEHOLD 

MEMBERS

1 

1 3 OR 

1 TO 2 I MORE 

MEMBERS (MEMBERS 

1 

L J

U.S. TOTALS BY MONTH

Ul

EXPENDITURES (BILLIONS CF DOLLARS) 

ALL FUELS............ .............

UNLEAfUC FJELS. .................

FUCl, UNKNOWN C UlfcSEL. .........

GULCNS PURCHSSEC (BILLIONS) 

ALL FUELS.........................

LcADEC HUELS.......... ...........

UNLFOEC FUELS..................

» * \-' * J 

5G

2.1

2.8

.3

6.3

3.0

3.0

.3

. 120.8

w J * a 

L. "!

1.8

2.0

.2

L T

1.9

2. 1

.2

83.9

1 Q

1.0

.1

2.1

1.1

.1

36. <;

1.7

.7

.1

I

Q

.1

41.6

4

1

1.9

2.1

4.5

2.1

2.2

.2

79.3

I

/.

.6

.1

1.5

.6

.1

30.2

L /.

2.2

2.0

.2

A. A

2.4

2.1

.2

90.7

4.5

2.1

2.2

.2

f. Q

2.3

2.3

.3

94.9

1.3

.7

.6

.0

I

f.

.7

.6

.1

25.6

2.3

1.0

1.2

.1

2 A

1.1

1.2

.1

52.4

3.6

1.8

1.6

.2

3 Q

2.0

1.7

.2

68.4

SOURCE: HCUSEHCLO TRANSPORTATION PANEL. RESIDENTIAL ENERGY CONSUMPTION SURVEY. 

OFFICE or THE CONSUMPTION DATA SYSTEM, 

CFFICfc CF PROGRAM DEVELOPMFNT, ENERGY INFORMATION ACMINISTRATION.
TABLE 14. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA - TOTALS FOR AUGUST 1979 8V HOUSEHOLD CHARACTERISTICS

iriAL

HOUSEHOLD 

LOCATION

1 

1

URBANI PUPAL 

AREAS (AREAS 

1

1

FAMILY INCOME

1 

LESS 1 

THAN j ABOVE 

$15,0001(15.000 

1 

1

NUMBER OF 

VEHICLES 

USED BY 

HOUSEHOLD

1 

(TWO CR 

ONE 1 MORE 

VEHICLE | VEHI1 CLES

NUMBER OF 

DRIVERS 

IN HOUSEHOLD

- .

1 

1 3 CR 

1 TC 2 1 MORE 

DRIVERS (DRIVERS 

1

NUMBER CF 

HOUSEHOLD 

MEMBERS

1 

1 3 OR 

1 TO 2 1 MCRE 

MEMBERS (MEMBERS

1 

I

U.S. TOTALS BY MONTH

EXPENDITURES (BILLICNS OF DOLLARS! 

ALL FUELS.........................

GALLONS PUKCHASEC (BILLIONS) 

ALL FUELS.........................

UNLEADED FUELS. .................

FUEL, UNKNOWN C DIESEL. .........

NUMBER OF VEHICLES (MILLIONS!.......

6.1

2,<5

2.7

.6

6.3

3.0

. * 2.7

.6

, 121.0

4.2

1.6

2.0

.3

4.4

2.0

2.1

66.2

1.9

1.0

.6

.2

1.9

1.1

.6

.2

 1A 0

2.0

1.0

.7

.2

2.1

1.1

.8

.3

L. 2 1

4.1

I

n

1.9

.3

4.2

2.0

1.9

.3

fO C

1.4

.6

.7

.1

1.4

.6

.7

.1

31.1

I U. f

* ^

2.3

2.0

.4

A Q

2.4

2.0

.4

OO C

oo.o 

4.5

2.0

2.0

.5

4.7

2.2

2.0

.5

CA. C

1.6

.7

.1

1.7

.7

.1

26.2

2.4

1.1

1.0

.2

2 A

1.1

1.0

.3

53.3

3f . 1

3.7

1

0

1.6

.3

3

r\

1.9

1.7

.3

67.7

SCURCC: I-CUSEHCLD TRANSPORTATION PANEL, RESIDENTIAL ENERGY CONSUMPTION SURVEY,

CfFICE OF THE CONSUMPTION DATA SYSTEM,

CFFICE OF PROGRAM CEVELCPMEM, ENERGY INFORMATION ADMINISTRATION.
TABLE 15. MONTHLY U.S. HCUSEHOLO TRANSPORTATION DATA - GASOLINE LINES

HAITED IN A tA3 LINE

AVERA6E LCN6EST kAII

FORCED TO BUY ALTERNATE

FUEL

vrc

NO....................

llflT OfOf^Otff

FORCED TO BUY ALTERNATE 

AMOUNT

SIZE OF ALTERNATE 

ANOUNTS VERSUS 

DESIRED AMOUNTS I/

I ADCrD

SMALLER fltC LARCER....

OCD/EVEN SYSTEM IN 

EFFECT

vrc

fcr T RPcrairr

JUN 

- «79

100X

40X

49

59X

-X

19X

80X

IX

23X

77X-X

23X

-X

-*

77X

34X|

64X

2X

JUL 

•79

100%

25X

27

75X-*

12X

I

OO «r

IX

16X

84 X

IX

1 

1

1

13X|

2X| -*

85X|

1 

1

31XJ

67X|

1X|

L _J

AUG 

•79

100X

10X

20

90X-x

I

Q Y

90X

IX

9X

90X

IX

7X

2X-» 

91X

29X

70X

1»

J

SEP 

•79

-

-

-

-

-

-

•

-

-

-

-

- 

-

-

-

-

OCT 

•79 

L - _J

_

_

_

_

_

_

^

PURCHASE MONTH

££E FCOTKC1ES AT EkO CF 14BLE.
TABLE 15. MONTHLY U.S. MCUSEHOLO TRANSPORTATION DATA - GASOLINE LINES - CONTINUED

oo

IfKABLE TO BUY FUEL

Y£S«*«*«« • ••• •

REASON: i/

STATION CLOSED

STATION CLOSED 

OR CUT OF GAS j/. 

LINES TCC LONG....

AKALVSIS OF FVEL 

SITUATION

aTC DDflRI F II

ccroTfiii^ cnroi m

. ,, j

JUN 

•79

34X

14X

21X

ex

3X

60X

7X

36X

46X

12X

5X

2X

.....__.J

1 

JUL •79

26 X

9X

17 X 

3X 

2X

54 X

20X

S5X

40X

4X

IX-X

L J

AUG 

•19

J

15X

6X

10X| -»-xi

73X|

12X

1 

75X

23X| -xi

IX

1X|

L_ — _J

SEP 

•79

, ,.,, ,

•

•

- 

- 

-

-

-

-

-

-

-

1 ______ J

OCT 

•75

J

•

*

_

_

_

1 ______ 1

PURCHASI

NCV 

•79

L __ J

M

^

___ _.

• MONTH

DEC 

•79 

1 ______ .

^

i»

_

[ __ J

JAN 

•80

L

*

_

FEB 

•80 

I

•

_

MAR 

•80 

L

•

APR 

•80 

|

•

MAY 

•80

-

_

_

_

- DATA *C1 AVAILJELE.

It HAY REFER 10 MORE 1HAN ONE PURCHASE.

2/ MORE IMK OkE FEISCN NAY BE SELECTED BY A HOUSEHOLD. J/ EXCLUCES STATIONS CLOSED ON WEEKENDS. SOURCE: HCUSEHOLC TPAHSPORTATION PANEL SURVEY* CFFICE CF IKE CONSUMPTION DATA SYSTEM* GFFICE CF PRCCRAH DEVELOPMENT* ENERGY INFORMATION ADMINISTRATION.
RELATIVE STANDARD ERRORS

The estimates in this report are subject to two types of variability. 

The first is sampling error, which occurs because not all elements of 

the universe are interviewed. The second type consists of random 

nonsampling errors and systematic bias that are not measured by the 

standard error. Sources of nonsampling error and bias include respond 

ent error, interviewer error, data processing error, and inaccurate 

coverage of the target population by the survey design. The survey was 

designed and conducted in order to minimize the effect of these sources 

of error.

One common measure of sampling error is the standard error, which 

represents the average difference between an estimate from a particular 

sample and the average estimate (or expected value) over all samples of 

the same size based on the same survey design. Generally, one may say 

that 95 percent of all estimates will be within two standard errors of 

the expected value. The estimate plus or minus two standard errors is 

called a 95 percent confidence interval for the expected value. (As 

calculated for this report, the standard error also partially measures 

the effect of certain nonsampling error but does not measure any systematic 

biases in the data. )

Another measure of sampling error, the one used in Tables 16 through 29, 

is the relative standard error of an estimate—the standard error 

expressed as a percentage of the estimate. For example:

relative standard error = (standard error / estimate) x 100 percent

If the relative standard error of an estimate is 5 percent, for example, 

we may say with 95 percent confidence that the "true" population value 

is within 10 percent (within 2 standard errors) of the estimate. 

Clearly, given an estimate and its relative standard error, the formula 

above allows one to calculate the standard error itself. This is neces 

sary for certain applications, such as the following important one, 

where we need the standard error of estimates.

Supppose one needs to determine the standard error for the difference of 

two estimates (for example, estimated prices per gallon in two different 

months), given the standard errors of both. It is not hard to show that 

the standard error being sought cannot be greater than the sum nor less 

than the absolute difference of the two standajrd errors. (This is the 

so-called triangle inequality in analysis.) ( If the lestimatesTare 

uncorrelated, the standard error being sought is the sum of the two 

standard errors.

19
TABLE 16. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA -

RELATIVE STANDARD ERRORS fPERCENTS) FOR JUNE, JULY, AND AUGUST AVERAGES

AVERAGES PER VEHICLE

MILES DRIVEN......................

EXPENDITURES ( DOLLARS I ............

FUEL INVENTORY AS A PERCENT 

Pf TANK CAPACITY........ .........

FUEL TANK CAPACITY (GALLONS) ......

AVERAGES PER GALLON

PRICE (CENTS PER GALLON)

LEADED FUEL... ................

D L> C Vi T i I M

0

MILES PER GALLON.. ................

NUMBER OF VEHICLES PER HOUSEHCLO. . . .

BILLIONS OF GALLONS IN TANKS ........

1 

JUN 1 

•79 1 

__ i- _ 1.

3.7

3.9

3.9

3.8

2.3

2.0

.5

.5

1.2

.5

2.5

3.0

6.2

1 

JOL 1 

•79 | 

1.

2.6

2.6

3.6

2.9

1.0

1.4

/.

.5

.7

.5

.4

2.1

2.4

5.4

MONTH

1 1 I 1 1 1 1 1 '1 

AUG 1 SEP | OCT | NOV I DEC 1 JAN I FEB | MAR | APR | MAY 

•79 | '79 1 «79 I «79 | »79 | «80 | »80 | « 80 I '80 | • 80 

. __1 i 1 ..... 1 1 I | 1 1

3. 

3. 

3 

1 ---------

---------

3.3 

3.6 ---------

-

<3 — — — . ~

1.7

6 - -

1.0 ----- -

. 

.4-

4 --------

2 5 — — — — —

2. 0 ---------

6.2 _______

- DATA NOT AVAILA3L5.

SCUPCe: HOUSEHOLD TfrANSPCRTAT ICN PANEL, RESIDENTIAL FNERGY CONSUMPTION SURVEY,

CFFICE OF THE CONSUMPTION CATA SYSTEM,

CFFICE OF PAOGRAC DEVELOPMENT, FMEPGY INFORMATION ADMINISTRATION,
TABLE 17. MONTHLY U.S. HOUSEHOLD TRANSPORTATION OATA

RELATIVE STANDARD ERRCRS (PERCENTS1 FOR JUNE 1979, AVERAGES BV VEHICLE CHARACTERISES

VEHICLE SIZE

TOTAL 1 

INTERMEOIATEl COMPACT 

AND 1 AND 

FULL SIZE (SUBCCMPACT

AVERAGES PER VEHICLE

GALLONS PURCHASED................... 3.7 5.5 4.0

PILES DRIVEN........................ 3.9 5.6 5.1

FUEL INVENTORY AS A PERCENT 

CF TANK CAPACITY................... 2.3 2.5 2.5

FUEL T4NK CAPACITY (GALLONS)........ 2.0 1.9 1.8

AVERAGES PER GALLON

PRICE (CENTS PER 64LLCN)

PREMIUM....................... 1.2 1.6 2.5

REGULAR....................... .5 .5 .6

BILLIONS OF GALLONS IN TANKS. ......... 1.2 9.3 7.6

MODEL YEAR FUEL US50

i i i

1975 | 1974 | I CTHER 

TO | AND LEADED (UNLEADED) AND 

1979 (EARLIER 1 (UNKNOWN 

!....___. _._.. __ 1. __ _1 __ .

3.0 6.9 6.8 4.1 9.2

2.9 7,4 7.1 4.2 10. I

3.6 5.8 5.6 5.4 9.9

3.0 7.0 7.0 4.2 9.4

2.0 3.4 2.5 1.6 5.1

2.7 2.3 2.1 2.6 4.9

.6 .5

1.1 .5

~ I /L

l.l .5

.6 .6

2.6 3.9 3.7 3.1 4.8

6.7 8.1 7.9 6.8 9.8

- DAT* NOT AVAILABLE.

SO'JKCF: HOUSEHOLD TRANSPORT AT ICN PANELt RESIDENTIAL ENERGY CONSUMPTION SUPVEY f

OFFICE OF THE CCNSUMPTICN CflTA SYSTEM,

CFF.ICE CF PRCGFAM DEVELOPMENT, ENERGY INFORMATION AOMINISTRATICN.
TABLE 18. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA

RELATIVE STANDARD ERRCRS (PEPCENTS) FOR JULV 1979, AVERAGES BY VEHICLE CHARACTERISITCS

AVERAGES PER VEHICLE

TOTAL 

I ____ .

VEHICLE SIZE

1

INTERMEDIATEl COMPACT 

AND I AND 

FULL SIZE ISUBCOMPACT 

1 1 _

MODEL YEAR

1 

1975 | 1974 

TO 1 AND 

IS79 (EARLIER 

1

FUEL USED

1 1

1 1 OTHER 

LEADED (UNLEADED! AND 

1 (UNKNOWN 

. 1 , 1

GALLONS CONSUMED.,.,,. ............

MILE S DRIVEN... ....... ............

EXPENDITURES (JCLLAR S) ............

FUEL INVENTORY iS A PERCENT

FUEL TftNK CAPACITY (GALLONS),.....

AVERAGES PER GALLON

PRICE (CENTS PER GALLON)

ALL FLF.LS. ......................

LEADED FUEL...................

! REGULAR.....................

UNLEADED FUEL.................

BILLIONS CF GALLONS IN TAKKS. .......

2.6

2.6

3.6

2.7

1.0

1.4

.5

.5

.4

2.1

5.4

3.5

3.5

4.?

3.5

1.3

1.1

.4

.5

1.1

.5

.4

1.9

6.1

2.8

2.9

4.3

3.1

1.2

1.7

.5

.6

1.2

.6

.6

2.6

8.2

3.0

3.0

3.7

3.0

.5

1.8

.4

.6

1.2

.8

.4

2.3

6.8

5.2

5.3

5.2

5.3

1.7

1.8

,5

.5

.8

.5

1.0

2.9

6.3

4.9

4.8

4.6

5.0

1.7

2.0

2.8

6.2

3.9

3.8

5.6

4.0

l.l

1.8

2.9

7.7

8.2

8.1

7.7

8.1

2.8

2.8

2.7

8.9

SOURCE: HOUSEHGLO TRANSPORTATION PANEL, RESIDENTIAL ENERGY CONSUMPTION SURVEY, 

OFFICE OF THF CONSUMPTION C»T« SYSTEM, 

OFFICE CF PROGRAM CEVELCPCElvT, ENERGY INFORMATION AOMINISTRATICN.
TABLE 19. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA

RELATIVE STANDARD ERRORS IPEP-CENTSI FOR AUGUST 1979, AVERAGES 8V VEHICLE CHARACTERISES

VEHICLE

TCTAL f 

INTERMEDIATE! 

AND ] 

FULL SIZE 1 

1 1 i

AVERAGES PER VEHICLE

GALLCNS PURCHASED...................

MILES DRIVEN........................

EXPENDITURES (DOLLARS) ..............

FUEL INVENTORY AS A PERCENT

FUEL TANK CAPACITY (GALLCNS)........

AVERAGES PER GALLON

PRICE (CENTS PER GALLON) 

ALL FUELS.........................

DC £MT 1 f M

REGULAR.......................

BILLIONS CF GALLONS IN TAfcKS. .........

3.3 

3.1

3.6

3.3

.9 

1.7

.4 

.6 

1.0 

.4

.4

2.5

6.2

4.5 

4.6 

4.8 

4.4

1.2

L.O

.4 

.6

1.6 

.5 

.5

1.7

5.3

SIZE

COMPACT 

AND 

SU8COMPACT

4.6 

4.6 

5.5 

4.4

1.3 

1.9

.7

.8 

1.8 

.7 

.8

3.7

10.6

MODEL YEAR

1<975 I 1974 

TO I AND 

1979 IEARLIER 

t

4.4 

4.2 

4.3 

4.5

1.2

2.5

.4 

.7 

1.8 

.7 

.4

3.2 

7.7

3.8 

4.0 

4.0 

3.8

1.6 

1.9

.6 

.7 

1.3

.6 

2.2

2.8 

6.7

FUEL USED

T F

1 f OTHER 

LEADED lUNLEADEOl AND 

1 (UNKNOWN 

1 1

4.5 6.3 8.3 

4.5 6.1 8.0 

4.5 5.6 7.6 

4.5 6.4 8.1

1.7 1.5 3.1 

2.3 1.5 4.2

3.5 3.4 3.7 

8.5 3.7 13.2

- CAT* NOT AVAILABLE.

SOURCE: HOUSEHOLD TRANSPORTATION PANEL, RESIDENTIAL ENERGY CONSUMPTION SURVEY,

OFFICE OF THE CCNSUMFTICN DATA SYSTEM,

OFFICE CF PROGRAM DEVELOPMENT, ENERGY INFORMATION ADMINISTRATION.
TABLE 20. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA

RELATIVE STANDARD ERRORS (PERCENTSI FOR JUNE 1979, AVERAGES BY HOUSEHOLD CHARACTERISTICS

TOTAL

.HOUSEHOLD 

LOCATION

, .

1 

1 

URBAN (RURAL 

AREAS (AREAS 

1

L __ _1_

FAMILY INCOME

1

LESS 1 

THAN | ABOVE 

tl5,OOO| $15,000 

1 

1

NUMBER OF 

VEHICLES 

USED BY 

HOUSEHOLD

1 

(TWO OR 

ONE 1 MORE 

VEHICLE ( VEHI1 1 CLES 

1 1

NUMBER OF 

DRIVERS 

IN HOUSEHOLD

1 

1 3 OR 

1 TO 2 I MORE 

DRIVERS (DRIVERS 

1 

I 1

NUMBER OF 

HOUSEHOLD 

MEMBERS

1 

1 3 OR 

1 TO 2 1 MORE 

MEMBERSI MEMBERS 

1 

1

AVERAGES PER VEHICLE

MILES OR I VEN...... ................

FUEL INVENTORY AS A PERCENT

AVERAGES PER GALLON

PPICF (CPNTS PER GALLCN)

MILES PER GALLCN..................

8ILLICNS OF GALLONS IN TANKS. .......

3.7

3.9

3.9

3.8

2.3

2.0

.5

.5

1.2

.5

.5

2.5

6.2

5.3

5.7

5.5

5.3

3.1

2.9

.5

.6

1.4

.5

.5

3.6

7.2

6.5

6.3

8.1

6.9

1.3

1.6

1.1

1.3

2.9

1.4

1.4

2.9

15.3

7.6

3.3

7.0

7.9

5.0

3.1

.6

.7

1.3

.8

.7

4.7

11.1

4.0

4.2

4.3

3.9

1.5

2.4

.6

.7

2.0

.7

.7

3.0

8.1

7.9

7.9

9.1

8.1

3.0

2.4

.7

1.0

3.3

l.O

.6

5.3

10.3

4.4

4.5

4.3

4.3

2.5

2.2

.5

.7

1.4

.7

.6

2.6

7.8

5.2

5.3

4.9

5.3

2.8

2.6

.5

.6

1.3

.5

.5

3.2

7.4

5.3

5.5

5.8

5.5

1.5

2.5

.3

.9

3.1

1.0

1.4

3.1

10.1

6.2

6.5

7.3

6.4

3.9

2.5

.5

.8

2.9

.5

.5

3.4

8.0

4.8

5.1

5.0

4.9

1.8

2.0

.6

.6

1.1

.6

.8

3.2

7.3

SOURCF: HCUSEHCLO T3ANSPORT*TICN PANEL, RESIDENTIAL ENERGY CONSUMPTION SURVEY* OFFICE of THE CONSIM*>TIGN DATA SYSTEM,

OFFICE OF PROGRAM DEVELOPMENT, ENERGY INFORMATION ADMINISTRATION.
TABLE 21. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA

RELATIVE STANDARD ERRORS (PERCENTSI FOR JULY 1979* AVERAGES BY HOUSEHOLD CHARACTERISTICS

TOTAL

.__..._

HOUSEHOLD 

LOCATION

1 

1 URBAN (RURAL AREAS (AREAS

1

1,....., 1.. ,_,. .J

FAMILY INCOME

1

LESS I 

THAN 1 ABOVE 

$15,0001*15,000 

1

1

NUMBER OF 

VEHICLES 

USED BY 

HOUSEHOLD

1 

1TWO CR 

ONE 1 MORE 

VEHICLE | VEHI- 

! CLES 

1

NUMBER OF 

DRIVERS 

IN HOUSEHOLD

1 

1 3 CR 

1 TO 2 1 MORE 

DRIVERS I DRIVERS 

1 

,, ., -.1. ..... ,.,

NUMBER GF 

HOUSEHOLD 

MEMBERS

1 

1 2 OR 

1 TO 2 I PORE 

MEMBERS (MEMBERS 

1

, , „!„ ,.,.._

AVERAGES PER VEHICLE

GALLONS PURCHASED...........

GALLONS CONSUMED............

MILES DRIVEN................

EXPENDITURES (DOLLARS)......

FUEL INVENTORY AS A PERCENT 

OF TANK CAPACITY...........

FUEL TANK CAPACITY (GALLONS). 

AVERAGES PER GALLON

PRICE (CENTS PER GALLON)

ALL FUELS..................

LEADED FUEL..............

PREMIUM................

REGULAR................

UNLEADED FUEL............

MILES PER GALLON...........

BILLIONS OF GALLONS IN TANKS.

2.6

2.6

3.6

2.8

1.0

1.4

3.2

3.1

4.5

3.1

1.1

2.0

4.6

4.5

5.9

5,3

2.4

1.8

4.3

4.2

4.9

4.4

2.2

1.5

2.7

2.7

4.1

2.8

1.2

1.9

4.2

4.6

6.5

4.4

1.6

1.7

3.5

3.4

3.9

3.6

1.4

1.5

3.1

3.0

3.8

3.3

1.3

1.6

6.2

5.9

7.6

6.2

1.4

1.7

3.3

3.4

4.S

3.4

i.e

1.8

4.1

4.0

4.3

4.2

1.4

1.4

.4

.5

.7

.5

.4

2.1

5.4

.4

.3

.9

.4

.5

3.1

5.5

1.1

1.3

1.3

1.4

.9

2.1

14.0

.5

.8

1.2

.8

.7

2.0

8.3

.5

.5

.9

.5

.4

2.7

7.4

.5

.8

1.9

.8

.6

3.9

10.2

.5

.5

.7

.5

.5

2.0

6.6

.4

.5 .

.8

.5

.4

2.4

5.8

,t

.6

.8

.6

.7

3.3

10.4

.4

.6

1.4

.6

.6

2.8

6.3

.5

.5

.8

.5

.5

2.3

6.3

SOURCE: HOUSEHOLD TRANSPORTATION PANEL, RESIDENTIAL ENERGY CONSUMPTION SURVEY, 

OFFICE OF THE CONSUMPTICN DATA SYSTEM, 

OFFICE OF PROGRAM DEVELOPMENT, ENERGY INFORMATION ADMINISTRATION.
TABLE 22. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA

RELATIVE STANDARD ERRORS IPERCENTSI FOR AUGUST 1979* AVERAGES BY HOUSEHOLD CHARACTERISTICS

TOTAL

1 ___

HOUSEHOLD 

LOCATION

I

1 

URBAN 1 RURAL 

AREAS lAREAS 

1

FAMILY INCOME

1

LESS 1 

THAN 1 ABOVE 

$15, 0001 $15, 000 

1

1 J

NUMBER OF 

VEHICLES

USED BY 

HOUSEHOLD

1 

ITWO OR 

ONE I MORE 

VEHICLE 1 VEHI1 CLFS 

1

NUMBER OF 

DRIVERS 

IN HOUSEHOLD

_

1 

1 3 OR 

1 TO 2 I MORE 

DRIVERS IDRIVERS 

1 

1

NUMBER OF 

HOUSEHOLD 

MEMBERS

.

1

1 3 OR 

1 TO 2 | MORE 

MEMBERS MEMBERS 

1 

1

AVERAGES PER VEHICLE

NJ

EXPENDITURES 1 10LLARS).. .........

FUEL INVENTORY AS A PERCENT

AVERAGES PER GALLON

PRICE (CENTS PER GALLCN)

JNLEACFC FUEL................

BILLIONS OF GALLONS IN TANKS.......

3.3

3.1

3.6

3,3

.9

1.7

.4

.6

1.0

.4

.4

2.5

6.2

4.2

4.0

4.6

4.1

1.7

2.1

.5

.7

1. 1

.6

.5

3.0

7.1

4.1

3.6

3.0

4.3

2.4

2.5

.8

1.0

2.1

.6

.7

2.7

14.9

6.1

5.9

6.8

6.0

1.9

2.0

.5

.5

2.1

.4

.9

4.4

9.0

3.8

3.7

4.4

3.7

1.3

2.1

.5

.8

1.2

.6

.5

3.0

8.4

6.0

5.6

5.8

6.0

1.4

2.7

.8

.8

1.4

.8

1.3

4.1

12.1

3.6

3.3

4.1

3.6

1.2

2.0

.4

.7

1.1

.5

.5

2.6

6.3

3.7

3.5

3.3

3.8

.9

1.5

.4

.6

1.1

.4

.5

2.5

6.1

7.1

6.4

7.9

6.9

3.2

4.2

.7

.9

1.5

.8

.9

5.1

15.0

5.0

4.8

4.1

5.0

1.1

1.9

.6

.9

1.0

.5

.8

3.4

7.6

4.4

3.9

4.9

4.5

Z.O

2.3

.5

.6

1.2

.6

.5

2.7

8.6

SOURCE: HOUSEHOLD TRANSPCRTATICN PANELt RESIDENTIAL ENERGY CONSUMPTION SURVEY,

OFFICE OF THE CONSOM°TICN DATA SYSTEM,

OFFICE OF PROGRAM DEVELOPMENT, ENERGY INFORMATION ADMINISTRATION.
TABLE 23. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA -

RELATIVE STANDARD ERRORS «PERCENTSI FOR JUNE* JULY* AND AUGUST TOTALS

MONTH

U.S. TOTALS BY NONTH

MILES DRIVEN (BILLIONS)............. 6.0 8.1 8.7

EXPENDITURES (BILLIONS OF DCLLAPS)

ALL FUELS......................... t.l 7.4 7.9

LEADED FUELS.................... 7.9 8.7 8.4

UNLEADED FUELS.................. 6.3 8.7 12.6

FUEL, UNKNOWN C DIESEL.......... 26.4 13.0 29.5

GALLONS PURCHASED (BILLIONS)

ALL FUELS......................... £.1 7.3 7.8

LEADED FUELS.................... 7.7 8.6 8.4

UNLEADED FUELS.................. 8.2 8.5 12.6

FUEL. UNKNOWN 6 DIESEL.......... 27.1 13.0 28.9

NUMBER OF VEHICLES (MILLIONS)....... 5.3 5.9 6.8

I OCT 

I «79

] NOV 

I «79

I DEC 

I »79

I JAN 

I «80

I I I I

I FEB | MAR I APR I MAY

I «80 | '80 I '80 I '80

to

- DATA NOT AVAILABLE.

SOURCE: HOUSEHOLD TRANSPORTATION PANEL, RESIDENTIAL ENERGY CONSUMPTION SURVEY,

OFFICE OF THE CCNSUMPTICN DATA SYSTEM,

OFFICE OF PROGRAM DEVELOPMENT, ENERGY INFORMATION ADMINISTRATION.
TABLE 24. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA

RELATIVE STANDARD ERRORS (PERCENTSI FOR JUNE 1979, TOTALS BY VEHICLE CHARACTERISTICS

VEHICLE SIZE

U.S. TOTALS BY MONTH

EXPENDITURES (BILLIONS CF DCLL4RS)

LEADED FUELS...................

UNLEADED FUELS. ................

FUEL, UNKNOWN £ DIESEL. ........

GALLONS PURCHASED (BILLIONS) 

ALL FUELS........................

UNLEADED FUELS. ................

FUEL, UNKNOV.N 6 DIESEL. ........

NUMBER OF VEHICLES ( MILL IONS 1. .....

KJ

TOTAL 

i __ _

6.1

7.9

8.3

28.4

6. 1

8.2

27.1

5.3

! 

INTERMEDIATE) 

AND I 

FULL SIZE | 

I- 1

6.7

7.0

9.8 

8.8 

34.8

7.0 

9.8 

8.8 

33.5

8.0

COMPACT 

AND 

SUflCOMPAC

8.5

7.8 

11.5 

15.0 

28.7

7.7 

11.3 

14.8 

28.9

3.1

MODEL YEAR

1 1 I 

1 1975 I 1974 I 

1 UNKNOWN! TO I ANO | UNKNOWN 

Tl | 1979 IEARLIER I 

.!___. ..1 1 1 , ...

14.0 7.6 8.4 79.3

14.0 7.7 8.5 

17.8 16.1 8.9 

24.6 8.6 33.6 

51.8 45.4 24.3

13.8 7.7 8,4 

17.4 16.0 8." 

24.2 8.5 33.7 

51.8 43.9 23.8

10.9 6.0 7.3 57.9

FUEL USED

1 1 

I 1 OTHER 

LEAOED lUNLEAOEOl ANO 

1 j UNKNOWN

7. 5 8. 9 9. 4

3.4 8.3 9.2 

9.5 26.1 9.6 

31.2 9.0 16.4 

33.0 35.4 35.1

6.7 6.6 3. 6

- DATA NOT AVAILABLE.

SOURCE: HOUSEHOLD TRANSPORTATICN PANEL, RESIDENTIAL ENERGY CONSUMPTION SURVEY,

OFFICE OF THE CONSUMPTION DATA SYSTEM,

OFFICE CF PROGRAM DEVELOPMENT, ENERGY INFORMATION ADMINISTRATION.
TABLE 25. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA

RELATIVE STANDARD ERRORS (PERCENTSI FOR JULV 1979. TOTALS BY VEHICLE CHARACTERISTICS

TflTAl

VEHICLE SI7T

1 1

INTF«MF.DIATE1 COMPACT 1 

AND 1 AMD UNKNOWN

FULL SIZE ISUBCfHPACTl

MODa YEAR

1 I 

1975 I 1974 I 

Tfl I AND UNKNOWN 

1 1979 (FARMER 1

PUEL USED

! 1 

1 1 OTHE* 

LEADED lUNLEADEOl AND 

1 I UNKNOWN

U.S. TOTALS BY MONTH

EXPENDITURES IPILLICNS GF OCLLARS)

UMFiOFO FUELS. .................

GALLONS PURCHASED ( B ILL ICKS ) 

ALL FUE LS .........................

FUEL, UNKNC1V.N 5 DIESEL. .........

to

7.'«

8.7

1.7

13.0

7.3

8.6

8.5

13.0

5.9

7.6

10.7

22.6

7.6

10.7

23.0

6.1

» A J

10. ft

12.2

i A -a

23.2

10.4

12.3

 /. i

23.2

9..)

12.6 9.5

- DATA NOT AVAILABLE.

SOURCE: HOUSEHOLD TRANSPORTATION PANEL, RESIDENTIAL ENERGY CONSUMPTION SURVEY,

OFFICE OF THE CTNSJ .WPTICN DATA SYSTEM,

CFF1CE GF PROGRAM OE-i/ELCPWEM. ENERGY INFORMATION A3M1NIST RAT I ON.

9.2 11.3 11.3

12.7

14. 5

20. 5

62.3

12.5

14.3

20.0

62.7

13.2

8.9

14.8

9.1

27.3

8.8

14.6

3.9

27.7

7.7

9.4

10.2

15. i>

20.3

9.3

\*>.2

14.8

20.9

6.2 40,8

9.0

I'l.O

13.7

14.8

6.3

10.1

19.4

10.5

?0. 3

8.4

10.9

15.5

13.3

?4.1

a. a
TABLE 26. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA

RELATIVE STANDARD ERRORS IPERCENTS) FOR AUGUST 1979, TOTALS BY VEHICLE CHARACTERISTICS

VEHICLE SIZE

TOTAL 1 I 

INTFHMEOI ATF| COMPACT | 1975 

4NC 1 AND (UNKNOWN TO 

FULL SIZE ISUBCO^PACT) 1979 

1 1 L 1 1_

U.S. TOTALS BY MONTH

"ILES DRIVEN ( 611 LITE'S) ...........

EXPENDITURES (BILLIONS OF 'JCLL4"S) 

ALL FUCLS. .......................

LFAHEO FUELS..................

UNLEADED FUELS.................

COLONS PURCHASED (BILLICNS)

LFADF") FIJH5... ................

UMLF40E-) FUELS. ...............

FUFL, UNKNOV.N t DIESEL. .......

MHIJFC CF VEHICLES MIL L ICNS )......

- DATA ^T AVAILABLE. 

SOURCE: H.TISEKSLO TO ANSPORT AT IC.N

3.

7.

8.

12.

29.

9.

12.

?R .

6.

PANEL.

7 7.?

9 6.7 

4 9.!) 

6 12.1 

5 22.5

B k.~> 

4 8. '3 

6 12.0 

9 23.3

R 5.2

RESIDENTIAL ENF^GV

14.

14. 

13.

4J.

14. 

13. 

17. 

41.

12.

CONS

8

2 

2

9

3 

4 

5

2

17

18 

17 

41 

51

17 

16 

41 

50

11

JMPT10N

.9

.5 

.2 

.6

.6

.9 

.9 

.9 

.2

.3

SJRVEY,

10. 

15. 

12.

45.

10. 

15. 

12. 

44.

8,

1 

MODEL YEAR | FUEL USED 

|

1 1 I 1 1 

1 1" 7 4 1 1 I | OTHER 

I AND IDNKNOWNI LEADED (UNLEADED! AND 

(EARLIER. 1 1 | (UNKNOWN 

i_ 1 i 1 1

9 

4 

8 

6

7 

6 

7 

4

7

7.

6. 

7.

28. 

22.

6. 

7. 

28. 

22.

6.

2 Q O 1 5 t

5 - 9.0 12.6 

6 - 6.8 26.3 

0 - 28.2 14.5 

2 - 42.6 45.2

4

5 

9 

1

9 41.8 7.8 9.3

15.7

15.4 

22.0

20.4

12.7

OFFICE OF THH CCMSU'-IPT I CN CATA 

OF PRHGKA1 OFVEl CP^FNT, ENERGY I NFCRMAT ICN AOM IN ISTR AT ION.
TABLE 27. MONTHLY U.S. HOUSEHOLD TRANSPORTATION CATA

RELATIVE STANDARD ERRORS (PERCENTS) FOR JUNE 1979, TCTALS BY HOUSEHOLD CHARACTERISTICS

TOTAL

HOUSEHOLD

LOCATION

 

1

1

URBAN! RUF AL

AREAS! AREAS

1

FAMILY INCOME

1

LESS 1

THAN | ABOVE

NUMBER OF

VEHICLES

USEC BY

HOUSEHOLD

1

ITWC CR

GNE | MORE

115,^Ji5|*15,OiUlVEHICLE 1 VEHt1 1 1 CLES

NUMBER CF

DRIVERS

IN HOUSEHOLD

1 TC 2

CRIVEPS

3 GR

MORE

DRIVERS

NUVSER CF

HOUSEHOLD

MEMBERS

i

! 3 CR

1 TO 2 | ^CRE

MEMBEHSl MEMBERS

1

llij, J i i i i _ J._ . , -i.

U.S. TOTALS BY MONTH

U)

EXPENDITURES (BILL

LFAOED FUELS..

UNLEADED FUELS

FUEL, UNKNOWN

GALLONS PURCHASED 

ALL FUELS.......

LEADED FUELS..

UNLEADFO FUELS

FUEL, UNKNOWN

NUMBER CF VfHICLES

ICKS CF DOLLARS)

e OIESFL. .........

( 0 ILLIONS)

& DIESEL. .........

( V ILLICNS).......

6.1

7.9

0 . ^

2, o.4

6.1

7.7

«.?

27.1

5. 3

7.6

12.4

42.8

7.6

IP ?

41. 1

C 1

16.1 ie.1

19.5

31.6

15.7

17.5

Q 1 ;"1

1C 0

12.5

13.8

16.9

44.2

12.3

13.4

If. 7

A 7 *>

11 "3

8.7

13.0

9.7

27.2

8.8

12.9

9.7

27. 8

7.2

1 1*. "}

24.8

19.3

38.6

14.2

24.5

19.1

38.3

1 l\ A

8.2

12.0

9.9

38.6

8.2

11.8

10.0

36.7

7.0

7.7

9.9

10.0

35.8

7.6

9.8

9.7

•3 A A

6.2

12.2

15.6

20.1

39.4

12.5

15.7

an j

10. c

9.5

1?. 1

11.6

37.2

9.3

11.8

11.5

37.9

7.3

7.1

9.2

9.8

30. 3

7.2

9.2

10.0

28.3

6.5

SOURCE: HCUSfHCLC TRANSPORT/SI ICI> PAM-l , RESIDENTIAL ENERGY CONSUMPTION SURVEY,

OFFICE CF THE CONSUMPTION DATA SYSTEM,

OFFICE CF PROGRAM DEVELOPMENT, ENERGY INTCMAT1CN ACMIM STR AT ICN.
TABLE 28. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA

RELATIVE STANDARD ERRORS IPERCENTSI FOR JULY 1979, TOTALS BY HOUSEHOLD CHARACTERISTICS

TOTAL

I. _.

HOUSEHOLD 

LOCATION

1 

1 

URBAN! RURAL 

AREASIAREAS 

1 

1 _____ I ____ .

FAMILY INCOME

1 

LESS I 

THAN | ABOVE 

SIS, 0001*15, 000 

I 

[.._, __ i... , J

NUMBER OF 

VEHICLES 

USED BY 

HOUSEHOLD

ONE 

VEHICLE

,

TWO OR 

MORE VEHI 

CLES

NUMBER OF 

DRIVERS 

IN HOUSEHOLD

!

\ 3 Cfl 

1 TO 2 1 MORE 

DRIVERS IDRIVERS 

1

-1

NUMBER OF 

HOUSEHOLD 

MEMBERS

.

1 TO 2

MEMBERS

3 OR 

CORE 

MEMBERS

U.S. TOTALS BY MONTH

F-XTN'OITLPFS (Pi ILL 

flLL F'J«!LS.......

LFSTt'l FUELS..

'NLFADFIJ FUFLS

FUFL, UNKNOWN

GALLONS PURCHASE") 

ALL FUFLS.......

- LF'OEO FUELS..

f3 i.JNLFAOFC FUFLS

Fi 1C 1 1 tfvJK MPUM

vi.JK3,hR np VFHICLFS

IONS OF OCLLAPS)

r ^J C<; C L. .......

(BILLMNS)

C DIFSF.L. .........

(MILLIONS).......

8 7

8.7

13.0

7.3

fl.6

8.5

13.0

5

c

7.6

7.3

10.0

22.7

7.6

7.9

9.8

23.4

5.7

15.8

IS.fc

Id. 2

74.6

15.3

13.1

17.7

24.7

] r, A

* V f 

9Q

1 A JL

10.6

OA A

9 Q

1 A A

10.5

25.0

8 a

9.5

11.5

10.3

19.3

9 A

11.4

10.2

1 Q A

7 Q

12.1

15.7

15.0

23.2

1 1 O

1C Q

14.8

23.3

Q A.

9

-j

10.6

1 C\ It.

1 A Q

9 n

10.6

10.2

14,7

7.0

o. r 

8-1

10.5

9.3

18.7

8

1

10.3

9 J

19.2

6.4

1 O. 1

14.4

15.7

16.6

53.0

14.5

IK O

16.6

e a o

11.1

1U.3

9.1

11.3

9.9

27.3

9

ft

11.2

S o

27.5

7.3

a.?

8

0

9

4-

10.1

« A A

8

1

9

fL

10.0

14.2

6

fl

I-OJSEHCLO TRANSPORTATION PANFL, RESIDENTIAL ENERGY CONSUMPTION SURVEY,

CFFICC OF THE CCNSUMPTICM C4TA SYSTEM, fFPICF QF P><n5RA>« OFVELCP1CNT, EKFRGY INFORMATION ADMINISTRATION.
TABLE 29. MONTHLY U.S. HOUSEHOLD TRANSPORTATION DATA

RELATIVE STANDARD ERRORS (PERCENTS) FOR AUGUST 1979. TOTALS BY HOUSEHOLD CHARACTERISTICS

TCT/SL

L _ _J

1 

1

HOUSEHOLD I FAMILY INCOME 

LCCATICN I 

1

1 _______

1 1 1 

1 1 LESS I 

UPBANl RURAL! THAN 1 ABOVE 

AREAS) ARE AS | $15,0001 $15,000 

1 1 1 

._ !__...__! ._.._,.. L___... .

NLMBER OF 

VEHICLES 

USFC BY 

HOUSEHOLD

ONE 

VEHICLE

TWO OR 

MOPF 

VEHI 

CLES

NUMBER OF 

DRIVERS 

IN HOUSEHOLD

1 

1 3 OR

1 TO 2 1 MO«E 

ORIVEPS (DRIVERS 

] 

|

NUMBER CF 

HOUSEHOLD 

MFWBERS

1 

t 3 OR 

1 TO 2 I MORE 

MEMBERSlfEMBERS 

1 

1

U.S. TOTALS BY MONTH

OJ

EXPENDITURES (BILL 

ALL FUELS.......

LEADED FUELS..

UNLEAOEC FUHLS

FUEL, UNKNOWN

GALLONS PURCHASED

LEADEC FUELS..

UNLEADED FUELS

FUEL, UNKNOWN

NUMBER CF VEHICLES

IONS CF COLLARS)

(BILLIONS)

£ 3IFSF.L..........

7

8

I?

?9

7

1?

28

6

• 1

.9

.4

.6

.4

.6

.6

c

14

,.

14

22

P

.3

.7

.0

.3

.3

.S

.3

21

18.

6P.

16.

•y r\

ifi.

67.

1 L

\

3

a

q

6

5

6

12

14

?0

?4

1 ?

14

?0

24

* V

.7

.0

.4

.7

.1

9.

11.

13.

45.

9.

11.

13.

45.

7

9

1

7

6

1

0

14.0 9.4 8.1 17.2 8.6 11.0

12.3

13.7

2C.9

33.5

12.3

13.9

21. 1

33.9

13.1

8.5

9.2

13.4

3 7. 4

8.4

9.1

13.3

36.4

6.7

7.8

8.2

12.0

33.0

7.7

8.1

11.9

12.3

6.7

16.0

16.3

23.8

35.4

16.0

16.5

73.9

35.5

14.8

7.5

8.2

14.0

28.1

7.6

8.4

14.0

28.1

8.6

10.4

11.7

14.2

49.2

10.3

11. 8

14.2

48.1

8.5

SOURCE: I-CISF.HCLO TRANSPORTATION PANEL, RESICENTIAL ENERGY CONSUMPTION SURVEY,

OFFICE OF Thf CONSUMPTION DATA SYSTEM,

CFFICE Cf PROGRAM DEVELOPMENT, ENERGY INFORMATION ADMINISTRATION.
HOW THE SURVEY WAS CONDUCTED

Introduction

The Household Transportation Panel (EIA-141) was designed by the Energy 

Information Administration (EIA) to provide data on energy consumption 

for motor vehicle transportation within the residential sector. This 

survey is one of several studies that together will provide data on 

energy consumption in the residential, commercial, industrial, and 

transportation sectors.

The purpose of the Household Transportation Panel is to provide monthly 

and annual estimates of fuel consumed and miles driven by household-used 

vehicles. Data are recorded in fuel purchase logs by monthly panels of 

respondents. ("Household vehicles" includes all motor vehicles used by 

the household except motorcycles, mopeds, large trucks, and large 

buses.) The panels of households are generally asked to report for two 

months initially, and then to report for another two months after a 

four-month interval of nonparticipation. Each month's panel is a repre 

sentative national sample selected from the 48 contiguous States and the 

District of Columbia.

Sample Selection

The Transportation Panel is comprised of households that are subsampled 

from two national surveys. The first survey used for subsampling is 

the set of 3,842 respondents to the National Interim Energy Consumption 

Survey (NIECS). Response Analysis Corporation (RAC) of Princeton, New 

Jersey, contacted 4,507 households for the NIECS in November and 

December 1978. They inquired about fuels used by the households, appli 

ances used, conservation activities, and characteristics of the house 

holds' vehicles. These households had been selected according to a 

complex, multi-stage sample design; probability techniques were used 

throughout all stages. Respondents in 69 of the 103 Primary Sampling 

Units (PSU's)^ who had at least one vehicle were randomly assigned to

Office of Management and Budget (0MB) Clearance No. 38-R0392.

more information on how the NIECS survey was conducted, see 

Residential Energy Consumption Survey ; Characteristics of the Housing 

Stock and Households, February 1980, DOE/EIA-0207/2, GPO Stock No. 

061-003-0093-2.

3Respondents in the other 34 PSU's from the NIECS were used in 

pretests to select an optimum design for the Panel.

35
6 groups. Starting in June 1979, and continuing through November 1979, 

one group was brought into the sample each month for a two-month report 

ing period. (There was some experimentation in July with one- and 

three-month reporting periods.) Starting in December 1979, these groups 

were returned to the sample, one each month, for another two-month 

reporting period.

The second survey was necessary to screen households for participation 

in the Transportation Panel beyond November 1979. This national "Screener Sample" was selected from the same block listings of housing units in 

103 PSU's that had been used for the NIECS, but excluding those house 

holds that had been selected for the NIECS. The Screener Sample was 

interviewed in November and December 1979 and resulted in 4,044 success 

ful contacts for a completion rate of 90 percent. Households that used 

vehicles for personal transportation were divided into 12 groups of 250 

each, and starting in December 1979, are being brought into the sample 

in the same 2-4-2 pattern as described for the NIECS households. 

Since January 1980, this general 2-4-2 reporting pattern has yielded a 

combined sample size of about 1,000 households for each month's panel 

from the NIECS and the Screener Sample.

Survey Operations

The basic instrument used for data collection in the Transportation 

Panel is the Vehicle Fuel Purchase Log (see Appendix). Sample house 

holds are requested to complete monthly logs for each of their vehicles. 

The information requested on the log for each purchase is the:

odometer reading

fuel gauge reading after the purchase

number of gallons purchased

total cost of the purchase

price per gallon

type of fuel purchased.

In addition, odometer and fuel gauge readings are requested for the 

first and last days of each month.

Selected households are first contacted by a letter briefly describing 

the task of completing the purchase log and conveying a gift of $2 per 

vehicle. A follow-up telephone call is made to verify information 

pertinent to the Transportation Panel, such as, address, household size, 

and vehicle inventory. The interviewer obtains the name of the main

Field experiments were carried out from February through June 1980 

to determine the effectiveness of other dollar amounts, the appropriate 

timing for conveying the incentive, and one- versus two-month reporting 

periods.

36
driver for each household vehicle so that the fuel purchase log can be 

mailed to that person. In addition, RAC secures the name and address of 

a neighbor who would know the forwarding address should a move occur 

between panel rotations.

Shortly before the first day of the reporting month, a fuel purchase log 

and instructions are sent to each household. A telephone call is made 

several days later to check on the arrival of these materials and to 

answer any questions the respondent may have. Panelists are requested 

to use the logs from the first day of the month until the last day.

A mid-month telephone call is made to answer any new questions and to 

encourage the respondent to continue with the panel. Finally, within 

four or five days after the end of the month, a telephone call is made 

to collect the data recorded on the fuel purchase log. The respondent 

who reads the log data to the interviewer also answers a short list of 

topical questions. For instance, during the first several months of the 

panel, respondents were asked about waiting in lines at gas stations.

Data Processing

Data from the final telephone interviews are coded and manually edited* 

Whenever it appears that fuel purchases have been skipped or that other 

mistakes have been made, calls are made to the households to try to 

obtain the correct information. The coding forms are keypunched and 100 

percent key-verified. A series of computer edits is made using the 

interrelationships among the data elements to check for reasonable 

values.

Estimation

A series of weights are applied to the reported data in order to expand 

them to population levels. These weights account for sampling and 

nonresponse, and incorporate ratio estimation techniques. A fuel 

purchase log was considered to be complete if the first and last pur 

chases were at least 15 days apart. Where purchase logs are complete 

but for one purchase, the missing purchase is estimated from those 

reported. If a household completed purchase logs for some but not all 

of its vehicles, the completed logs are weighted up to represent the 

missing logs in that household. Sampled households that provided no 

complete purchase logs were accounted for by weighting up reported data 

at various sub-national levels.

The sampling weight applied to the data is the product of the following 

weights:

• The household weight from the NIECS or the Screener Sample

• The inverse of the chance of selecting the household to 

be in a particular month's panel.

37
Ratio estimates by the type of community within four Census regions and 

for selected houshold characteristics were used as a final adjustment 

to the weights.

Response Rates

The percentage of vehicles for which purchase logs were completed is 

shown below.

June 1979 July 1979 August 1979

Completed Logs 66% 58% 53%

Number of Eligible Vehicles 1,052 2,125 1,319

Vehicles w/Completed Logs 690 1,235 696

To be eligible, the vehicle must meet the qualifications described in 

the glossary and be available for the household to use. It need not 

have been driven.

The total number of weighted vehicles in any month is the result of an 

estimate based on the average number of vehicles per household determined 

on a straight line basis from November 1978 to November 1979 (the N1ECS 

and Screener surveys). This estimate is then adjusted for the number 

of households in the population taken from the Current Population Survey 

estimates as reported by the Bureau of the Census.

38
APPENDIXES

A. Fuel Purchase Survey Log

B. Fuel Purchase Survey Instructions

C. Background Questionnaire

D. Gas Lines Questionnaire

39
A. FUEL PURCHASE SURVEY LOG

Information on fuel purchases is 

confidential and will be used only 

in statistical summaries. This survey 

is being done under the Federal 

Energy Administration Act of 1974. 

Your participation is voluntary.

U.S. DEPARTMENT OF ENERGY

National Survey of 

Fuel Purchases for Vehicles

MAY 1980

Conducted by

Response Analysis Corporation

P.O. Box 158 

Princeton, New Jersey

41
File No. VEHICLE FUEL PURCHASE LOG

PLEASE KEEP THIS LOG IN YOUR VEHICLE AND WRITE DOWN EVERY GASOLINE OR DIESEL FUEL PURCHASE

BETWEEN MAY 1. 1980, AND MAY 31, 1980.

0MB No. 38-R0392 EIA-141

MAKE THESE ENTRIES I BEFORE FIRST USE \ 

OF VEHICLE ON / 

HAY 1. 1980 f

Total 

Vehicle 

Mileage

Complete the line showing how full the tank 1s before first use on 

May 1. 1980

Vehicle Make: 

Vehicle Year: 

Vehicle Model:

About how many gallons does the tank of this vehicle hold?

[] DON'T KNOW

GALLONS

FUEL PURCHASES

Purchase 

NiMber..

1

2

3

4

Fuel 

Purchase 

Date

Total 

Vehicle 

Mileage

Complete the line showing 

how full the tank 1s after 

fuel purchase

<x^T^xs

^^

<f5I

<C>^-

p^

TT^X

T/^x

<5^

Number of 

Gallons 

Purchased

Total Cost 

of Fuel

Price 

per Gallon

Was the 

tank 

filled?

[] YES 

[] NO

[] YES 

[] NO

[] YES 

[] NO

[] YES 

[]NO

Type of Fue

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

Purchased

[] REGULAR 

[] PREMIUM 

[] DIESEL

[] REGULAR 

[] PREMIUM 

[] DIESEL

[] REGULAR 

[] PREMIUM 

[] DIESEL

[] REGULAR 

[] PREMIUM 

[] DIESEL

Please note any problem 

related to this purchase

PLEASE CONTINUE RECORDING PURCHASES UNTIL MAY 31, 1980 ON SECOND PAGE OF THIS LOG.

MAKE THESE ENTRIES 

AFTER LAST USE 

OF VEHICLE ON 

MAY 31. 1980

Total Vehicle 

Mileage

Complete the line showing how full the tank 1s after last use on May 31. l950~

After the last use on May 31. 1980, please keep this log near your telephone. 

We will be calling to obtain the Information. Or. If you will be difficult to reach by telephone, call collect to Pat Gamblno at (609) 921-3333.

THANK YOU VERY MUCH FOR YOUR HELPI
CO

Purchase

Ui^aKAi* liUMDVi* 

5

6

7

8

9

10

11

12

13

14

Fuel 

Purchase 

Date

Total 

Vehicle 

Mileage

Complete the 

how full the 1 

fuel purchase

<^

<^TSI ^^

.X"* <C\J ^<^

<rSJ ^i .x**""1 <TAjj "^

<^

<>s "^

<^S- "^

<d5 ^^

.^*z~~

<CAjJ ^^

line showing 

tank Is after

P>

7£> jp^ . ^>itf

(3r>> i^

L/^b. ^>

^>

^>Ip^

^>Ifi^

£&> yp^

^2> yp^

NMber of 

Gallons 

Purchased

Total Cost 

of Fuel

Price 

per Gallon

Was the 

tank 

filled?

[] VES 

[] NO

[] YES 

nNO

[] YES 

nNO

[] YES 

[] NO

[] YES 

[] NO

[] YES 

C1NO

[] YES 

[]NO

[] YES

n NO

[] YES 

[]NO

t] YES 

nNOIWf

Type of Fue

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

f] UNLEADED

[] LEADED 

n UNLEADED

[] LEADED 

[] UNLEADED

Purchased

[] REGULAR 

[] PREMIUM 

[] DIESEL

[] REGULAR 

[] PREMIUM

[] DIESEL

[] REGULAR 

[] PREMIUM

[] DIESEL

[] REGULAR 

[] PREMIUM

[] DIESEL

[] REGULAR

n

BBCtlTIM

[] DIESa

[] REGULAR 

[] PREMIUM 

[] DIESEL

[] REGULAR 

[] PREMIUM

[] DIESEL

[] REGULAR 

[] PREMIUM

[] DIESEL

[] REGULAR 

[] PREMIUM

[] DIESa

[] REGULAR

n

n^Mavaat

[] DIESa

Please note any probltM 

related to this purchase

AFTER THE LAST USE OF THIS VEHICLE ON HAY 31, 1980, PLEASE 

COMPLETE EHTRIES AT THE BOTTOM OF THE FIRST PAGE OF THIS LOG.
Purchase 

NiMber..

15

16

17

18

19

20

21

22

23

24

Fuel 

Purchase 

Date

Total 

Vehicle 

Mileage

Complete the 

how full the 1 

fuel purchase

>X^*" "

^^

^

.x**^ <CAJ- "^

^*-I 

<CAjJ ^^

<£

^4

<^

<^

<^

^"**

<^

^ *"*~

<<"XiJ

^

Ine showing 

tank Is after

^>

^

r/^^^

t&> ^^

'^$^9>

^

^>$>"^p^

N«Mber of 

Gallons 

Purchased

Total Cost 

of Fuel

Price 

per Gallon

Mas the 

tank 

filled?

[] YES 

UNO

[] YES 

[]NO

[] YES

n NO

[] YES 

nun

[] YES

n

unnu

[] YES 

[] NO

t] YES 

[] NO

[] YES 

[]NO

[] YES 

[] NO

[] YES 

[] NO

Type of Fue

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

[] LEADED 

[] UNLEADED

1 Purchased

[] REGULAR 

[] PREMIUM 

[] DIESEL

[] REGULAR 

[] PREMIUM 

[] DIESEL

[] REGULAR

n

iMfePMTIlM

[] DIESEL

[] REGULAR 

[] PREMIUM

[] DIESEL

[] REGULAR 

[] PREMIUM

[] DIESEL

[] REGULAR 

[] PREMIUM 

[] DIESEL

[] REGULAR 

[] PREMIUM 

[] DIESEL

[] REGULAR 

[] PREMIUM 

[] DIESEL

[] REGULAR 

[] PREMIUM 

[] DIESEL

[] REGULAR

n

DDmflM

[] DIESEL

Please note any problen 

related to this purchase

GPO 866 525

AFTER THE LAST USE OF THIS VEHICLE ON MAY 31, 1980, PLEASE 

COMPLETE ENTRIES AT THE BOTTOM OF THE FIRST PAGE OF THIS LOG.
B. FUEL PURCHASE SURVEY INSTRUCTIONS Td

May

Please keep the Fuel Purchase Log in your vehicle.

Fill in now;

The vehicle make, model year, and model name.

If you know the (approximate) number of gallons that the fuel 

tank of the vehicle holds, please fill in that number.

On Thursday, May 1, or the first time 

you use the vehicle after that date:

Put the number of miles shown on the total mileage meter 

(odometer) of the vehicle.

After you start the engine for the first time, complete the 

line showing (approximately) the level of fuel in the tank of 

the vehicle.

Starting on May 1 and continuing 

until May 31;

Use your vehicle and purchase fuel as you normally would during 

this period.

Fill in entries for each purchase of fuel (see reverse side of 

these instructions).

On Saturday, May 31:

After your last use of the vehicle on May 31, complete the 

entries showing the number of miles on the total mileage meter 

(odometer), and the approximate level of fuel in the tank of the vehicle.

After your last use of the vehicle on May 31, please keep the Log 

near your telephone. We will be calling you within a few days 

after May 31 to obtain the information on fuel purchases 

from you.

We will be sending you an additional Log for your fuel purchases 

during the month of June.

If you have a question about your Fuel Purchase Log, please call 

collect to (609) 921-3333 any weekday between 9 a.m. and 4 p.m., 

eastern time. Ask to speak to Patricia Gambino.

Turn page for additional instructions 

45
Please make the following entries for each fuel purchase for your 

vehicle:

Fuel purchase date Show the month and day each time gasoline 

or diesel fuel is added to the vehicle.

Total vehicle mileage This is the number of miles shown on the 

total mileage meter (odometer) of the 

vehicle at the time you stop for fuel.

Line showing how full 

tank is after fuel 

purchase

Most vehicles have a meter showing the 

(approximate) level of fuel in the fuel 

tank. After fuel has been added to the 

tank, and you have started your engine 

again, draw in the line showing the 

approximate level of fuel.

Number of gallons 

purchased

Make this entry to the nearest tenth of a 

gallon (for example: 3.4 or 11.8).

Total cost of fuel Show total cost of the gasoline or diesel 

fuel. Do not include cost of oil or other 

items, if any, purchased at the same time.

Price per gallon This is the price per gallon for the 

type of gasoline or diesel fuel you pur 

chase, to the nearest tenth of a cent.

Was the tank filled? Generally, this answer should be marked 

"YES" if you had asked to have the tank 

filled (and the amount of the purchase 

was not limited by the service station). 

The answer would usually be "NO" if you 

have asked for a certain number of gal 

lons or for a dollar amount, or the 

amount of the purchase was limited by 

the service station.

Type of fuel purchased Mark an answer in each column that 

applies.

Any problem related 

to purchase?

Note any problems or difficulties in ob 

taining fuel when you wanted it, or in 

the amount or type of fuel that you wanted

IMPORTANT: Please keep the purchase log in your vehicle. The

entries should be made for each purchase of fuel, even 

when someone other than the main driver of the vehicle 

makes the purchase.

46
Response Analysis Corporation 

PHnceton, New Jersey 

RAC 3993

0MB No. 38-R0392

C. BACKGROUND QUESTIONNAIRE

U.S. DEPARTMENT OF ENERGY

National Survey of 

Fuel Purchases for Vehicles

BACKGROUND QUESTIONNAIRE

1. At the time of our interview in 

(READ LIST BELOW). (MONTH/YEAR)

_, the members of your household included

2. Is there anyon was not a membi

HOUSEHOLD 

MEMBER f

1

2

3

4

5

6

7

8

9

10

11

12

RELATIONSHIP

SEX

FEMALE MALE

J[] *[]

1[] i[]

It3 *[]

J[] 2[]

J[] 2[]

1[] ^[]

J[] it]

J[] 2[]

2[] ?t]

it] *[]

J[] 2[]

Id 2[]

AGE

e living in your household now who l[] YES -* Who is that? (ADD TO LIST) 

sr of your household in (MONTH/YEAR)? 0[] NO

3. Was there anyone living in your household in (MONTH/ j[] YES -- Who is that? 

YEAR) who is not a member of your household now?

HOUSEHOLD MEMBER #(S) FROM TABLE ABOVE 

c[] NO

47
Background Questionnaire - 2

4. At the time we spoke with your household in (MONTH/YEAR) you had a (READ LIST BELOW).

VEHICLE 

TYPE

MAKE

MODEL YEAR

MODEL NAME

FUEL USED 

(READ ONLY IF 

NECESSARY TO 

VERIFY)

J[] GASOLINE 

2[] DIESEL 

J[J ELECTRICITY

l[] GASOLINE 

2[1 DIESEL 

3[J ELECTRICITY

l[1 GASOLINE 

2[1 DIESEL 

3[J ELECTRICITY

l[] GASOLINE 

*M DIESEL 

JJU ELECTRICITY

la. Do you still have 

(VEHICLE LISTED 

ABOVE)?

IF YES:

4b. What is the 

name of the 

main driver?

4c. FILL IN HOUSE 

HOLD MEMBER # 

FROM Q. 1

1[] YES

2[] NO

in YES

2[] NO

in YES

2[] NO

in YES

2[] NO

INTERVIEWER:

IF HOUSEHOLD STILL HAS ONE OR MORE VEHICLES LISTED IN Q. 4, ASK Q. 5a ON FOLLOWING PAGE. 

IF HOUSEHOLD NO LONGER HAS (ANY) VEHICLE LISTED IN Q. 4, ASK Q. 6a ON FOLLOWING PAGE.

48
Background Questionnaire - 3

IF HOUSEHOLD STILL HAS ONE OR MORE VEHICLES LISTED IN Q. 4. ASK;

5a. Do you or other members of your household own or 

have the regular use of any cars, trucks, vans, 

or similar vehicles, in addition to (MAKE AND 

MODEL YEAR FROM Q. 4)?

5b. How many additional vehicles do you have?

JE3 YES

NO -- SKIP TO Q. 23

ONE

TWO

THREE

FOUR OR MORE

SKIP TO Q. 7

IF HOUSEHOLD NO LONGER HAS ANY VEHICLE LISTED IN Q. 4. ASK:

6a. Do you or other members of your household now own or have the regular use of any cars, trucks, vans, 

or similar vehicles?

6b. How many vehicles do you have?

1[3 YES 0[] NO — SKIP TO Q. 23

1 '] ONE 

2 " TWO 

3 ' THREE 

4'' FOUR OR MORE

ASK Q. 7

ASK QUESTIONS 7 - 21 ABOUT EACH VEHICLE NOT LISTED IN Q. 4

7. Which type(s) is it (are they)?

8.

STATION WAGON 

AUTOMOBILE

JEEP OR SIMILAR VEHICLE

PASSENGER VAN' OR MINIBUS

CARGO VAN

PICKUP TRUCK

OTHER TRUCK

MOTOR HOME

OTHER (SPECIFY):

Please tell me the make and model 

year (of each one). (ENTER LAST 

TWO DIGITS OF MODEL YEAR.)

9. What 1s the model name (of each one)?

MAKE

MODEL YEAR 

MODEL NAME

Al

07ft

19

A2

£><[]

19

A3

07[]

19

A4

01 []

05[]

19

49
Background Questionnaire - 4

ALL HOUSEHOLDS WITH ONE OR MORE ADDITIONAL VEHICLES ON QS. 5-6

10. In what month and year did you get it?

11. How many miles has it been driven since 

you have had it?

•

12. About how many miles were driven on a 

highway (that is, with relatively little 

"stop and go" driving)?

13. Is it used on-the-job, that is, for any 

reason other than for going to or from 

work, by anyone in your household?

IF "YES," ASK:

14. About how many miles were driven 

on-the-job since you have had it?

IF USED FOR HIGHWAY DRIVING ON Q. 12, ASK:

15. How many miles per gallon does it 

get in highway driving, just 

approximately?

16. How many miles per gallon does it 

get in local driving, just 

approximately?

IF MILES PER GALLON GIVEN, ASK:

17. Has someone actually figured 

out the miles per gallon, or 

is it more a general impression?

IF NOT USED FOR HIGHWAY DRIVING ON 0. 12.

18. For the kind of driving for which it 

is used, how many miles per gallon 

does it get, just approximately?

IF MILES PER GALLON GIVEN, ASK:

19. Has someone actually figured out 

the miles per gallon, or is it 

more a general impression?

MONTH 

YEAR

MILES 

DON'T KNOW

MILES

NOT USED 

ON HIGHWAY

DON'T KNOW

YES 

NO

MILES 

DON'T KNOW

MILES PER 

GALLON

DON'T KNOW

MILES PER 

GALLON

DON'T KNOW

ACTUAL 

IMPRESSION

ASK:

MILES PER 

GALLON

DON'T KNOW

ACTUAL 

IMPRESSION

Al

19 __

[]

[] 

[]

%

[]

[]

[]

JH

t— K) 

I l1 — iirU-ll—l 1— 

50
Background Questionnaire - 5

ALL HOUSEHOLDS WITH ONE OR MORE ADDITIONAL VEHICLES ON QS. 5-6

20. What kind of fuel is used most frequently?

UNLEADED REGULAR GASOLINE

UNLEADED PREMIUM GASOLINE

REGULAR GASOLINE

PREMIUM OR HIGH TEST GASOLINE

DIESEL

ELECTRICITY

OTHER (SPECIFY):

DON'T KNOW

21. What type of engine does it have? 1 -CYLINDER

2-CYLINDER

3-CYLINDER

4-CYLINDER

5-CYLINDER

6-CYLINDER

7-CYLINDER

8-CYLINDER

ROTARY

ELECTRIC

OTHER (SPECIFY):

DON'T KNOW

Al

01[]

02 [ J

<»[]

04 f J

os r j

06[] «[]

96[]

«[]

02[]

03[]

04[]

05[]

06[]

07[]

Ofl[]

"[]

i2[]

2i[]

96 [j

A2

01 []

02[]

03 r i

04 L J

os[]

06 r i «[]

96[]

«[]

02[]

03[]

04[]

05[]

06[]

07[]

08[]

Ji[]

J2[]

2i[]

96[]

A3

w[]

02[]

03[]

04[]

05[]

06 []

«[]

96[]

«[]

02[]

03[]

04[] ^5 [i

06 L J

07^ J

O^L J

Jj[]

12[]

2J[]

96[]

A4

OJ[] 02 r j

o^r j

04 r j

05[]

06[]

«[]

96[]

«[] 02 r j

03[]

04L J

05 £ J

06\. J

07[]

os[]

-I-Z[]

12[]

2j[]

96[]

22. What is the name of the main driver? (ASK ABOUT EACH ADDITIONAL VEHICLE)

VEHICLE NUMBER

Al

A2

A3

A4

MAIN DRIVER'S NAME

HOUSEHOLD 

MEMBER * 

(FROM Q. 1)

51
Background Questionnaire - 6

ASK EVERYONE

23. Are you planning to move any time between now and 

the end of June 1979?

YES NO - SEE INSTRUCTION IN BOX 

AT BOTTOM OF PAGE

IF "YES" ON Q. 23. ASK:

24. Would you please give me the name, address, and telephone number of two friends or rela tives who will know where you can be reached after you move?

NAME:

STREET:

CITY AND STATE:

PHONE : ( )

RELATIONSHIP 

TO RESPONDENT:

NAME:

STREET :

CITY AND STATE:

PHONE : ( )

RELATIONSHIP 

TO RESPONDENT:

EXPLAIN PROCEDURE FOR FUEL PURCHASE LOG TO RESPONDENT AND/OR TO EACH MAIN DRIVER WHO IS AT 

HOME AT THE TIME OF THIS VISIT.

(Interviewer) (Date Completed) (Time Completed)

52
HOUSEHOLD f

D. GAS LIMES QUESTIONNAIRE RAC 3993 073079

He arc Interested 1n finding out about any problems that you have had buying gasoline (dlesel fuel) for your house 

hold vehicles within the past two weeks.

(You have already mentioned that . . . )

Please tell me whether any of the following happened to you (or other Members of your household)?

PI. Did you wait 1n line at a service station for mre than a few minutes?

IF YES: P2. About what was the longest that you had to wait?

YES

OR

TUHUTES

Of] NO

HOURS

SKIP TO P3.

62-S4

P3. Did you have to buy a type of fuel other than the type you wanted?

IF YES: P4a. What type did you want?

P4b. And what type did you get 

Instead?

YES 0[] NO ——> SKIP TO P5.

TYPE WANTED

TYPEtwTAINED

55 

6C-S?

SB-SS

PS. Did you have to accept an amount that was differ ent from the amount you wanted?

IF YES: P6. Was the arount smaller than you wanted, or larger than you 

wanted?

P7. What was the amount that you had

If] YES 0[] MO • SKIP TO P8. 60

[] SMALLER [] LARGER [] BOTH HAPPENED 61 

(DIFFERENT PURCHASES)

P8.

P9.

to take?

Do you have an "odd/even day" system for gasoline purchases 1n your area?

(Other than the odd/even system) Here you unable 

to buy fuel on a day or at a time when you wanted

IF YES: P10. What was the reason? 

(MARK ALL THAT APPLY)

tll«HBCR Or COLLARS:

OR NUMBER OF GALLONS: __________

J[] YES dU HO 6[] DON'T KNOW

1t? 1[) YES o[] NO —— >SKIP TO Pll.

[] STATIONS CLOSED ON WEEKENDS

[] STATIONS CLOSED (WEEKENDS NOT MENTIONED) 

OR OUT OF GAS

[] LINES TOO LONG/COULDN'T WAIT IN LINE

n OTHER (SPECIFY):

6S-63 

S4-6S

66

6?

68 

69

70

71

Pll. All In all, which of the following would you say best describes buying fuel for your house 

hold veMcle(s) 1n your area? (READ ANSWER ALTERNATIVES)

MOTE ANY ADDITIONAL COMMENTS BELOW

0[] NO PROBLEM AT ALL

_[] A SMALL PROBLEM

*[] A BIG PROBLEM

J[] A REALLY SERIOUS PROBLEM

73-74

DATE OF INTERVIEW:

53

GLOSSARY

refers to household members who can drive a car, truck, or

motorcycle. Persons who can drive but do not ordinarily do so are also 

included.

ExpencUxtuAfcA refers to the total cost of the gasoline or diesel fuel 

added to the vehicle's tank including taxes. Expenditures do not 

include the cost of oil or other items that may have been purchased at 

the same time as the fuel.

F<mU.y Income, is the total combined income in 1977 for the NIECS house 

holds (1978 for Screener households) from all sources befor^Ataxes and 

deductions. It includes wages, salaries, tips, commissions, and income 

from social security, pensions, interest, dividends, rent, public 

assistance, and unemployment insurance. Family income includes the 

total income for all family members who lived in the household, regard 

less of whether they were living there at the time of the interview. 

Income of nonfamily members of the household is not included. Family 

includes the following types of relationship: mother, father, sister, 

brother, son, daughter, father-in-law, uncle, aunt, niece, grandchild 

and similar relationships.

f^Ltt-up. A fuel purchase was recorded as a fill-up when the attendant 

was asked to fill the tank. (When the attendant was asked for a certain 

number of gallons or for a dollar amount of fuel, the instructions to 

the respondent called for usually not recording this as a fill*-up.)

Fae£ lm)e.wLon.y o& a PeAce.nt oj Tank Capacity is an average over all 

vehicles of their average percents full during a month (see Percent 

Full Durin& a Month).

It is given by:

wi c i

i 

where

w^ = the weight for the i-th vehicle in the sample;

c = the tank capacity (in gallons) for the i-th vehicle;

55
and p = the average percent full for the month for the i-th 

1 vehicle.

Fuel lilted is the respondent's report of the fuel that is typically put 

in the fuel tank.

Fuel Tank Ca.pa<u£y is the size of the vehicle's fuel tank in U.S. 

gallons. Data for automobiles was taken from Automotive News which 

provides fuel tank size for foreign and U.S. automobiles. Data for 

trucks and vans were the figures provided by the respondent on the fuel 

purchase log.

GoJUtonA Consumed, refers to the number of gallons of fuel used by the 

vehicle during the month. Gallons consumed is equal to gallons pur 

chased minus the difference in the fuel tank levels at the beginning 

of the month and at the end of the month. For example, consider a 

vehicle with a 20-gallon tank that was half full at the beginning of the 

month and three quarters full at the end of the month. Gallons con 

sumed in this case would equal the gallons purchased minus one-fourth of 

the tank capacity or five gallons. For vehicles missing fuel meter 

readings, the gallons consumed is the same as gallons purchased.

Patcfuuect refers to the total number of gallons of, fuel added to 

the household vehicle's tank.

GaJULonA Jun. Tcunk& refers to the amount of fuel stored in vehicle tanks. 

Gallons in tanks for a vehicle is derived from the average percent of 

tank full for the month and the vehicle tank size.

LJWA V&ta.. In June 1979, Response Analysis Corporation (RAC) 

began collecting data for the CDS on the fuel-purchasing situation faced 

by motorists in the United States (48 contiguous States and the District 

of Columbia) . The data are obtained from a sub sample of the residential 

energy consumption surveys being conducted. Households participating in 

the monthly transportation interviews are asked a series of questions 

concerning the fuel-purchasing situation in their area during the two 

weeks preceding the interviews which are performed at the end of each 

month.

Household includes up to 12 persons who occupy a housing unit. "Occu.pt/" 

means the housing unit was the person's usual or permanent place of 

residence at the time of the first field contact. The household in 

cludes babies, lodgers, boarders, employed persons who live in the 

housing unit, and persons who usually live in the household but are away 

traveling or in the hospital. The household does not include persons 

who are normally members of the household but who were living away from 

home such as college students or members of the armed forces at the 

time of the interview. By definition, the count of households is the 

same as the count of occupied housing units.

56
A "hou&ing unit" is a structure or part of a structure where a household 

(family or individual) lives or could live. It has a separate entrance 

from the outside or from a common hall or lobby, or it has cooking 

facilities for the exclusive use of the occupants. Housing units do not 

include group quarters such as prisons, hospitals, dormitories, nursing 

homes, fraternity houses, or convents. Hotel or motel rooms, mobile 

homes, boats, tents or trailers are considered housing units if oc 

cupied .

"Occup-ted kou&ing un-ct" means that someone was living in it as his/her 

usual or permanent place of residence at the time of the first field 

contact.

Me&topo&itan refers to households located within Standard Metropolitan 

Statistical Areas (SMSA's) as defined in the 1970 Census. Except in 

New England, an SMSA is a county or group of contiguous counties that 

contains at least one city of 50,000 inhabitants or more, or "twin 

cities" with a combined population of at least 50,000. The contiguous 

counties are included in an SMSA if, according to certain criteria, they 

are essentially metropolitan in character and are socially and economi 

cally integrated with the central city. In New England, SMSA's consist 

of towns and cities, rather than counties. "Nome&WpoLitan" refers to 

households not located within SMSA's as defined in the 1970 Census.

Vtuven refers to the total number of miles the household vehicle

was driven during the reporting month. Miles driven is computed by 

subtracting the vehicle's odometer reading at the first of the month 

from its odometer reading at the end of the month.

Pe/tcen£ o& Tank fuJUL refers to the proportion of the vehicle's tank that 

is filled with fuel. The percent of tank full is derived from the fuel 

meter reading showing the level of fuel in the tank. The respondent 

recorded the fuel meter reading on a pictorial representation of the 

fuel meter after starting the engine at each of the following times:

• Beginning of the month (before the first use of the 

vehicle on the first day of the month)

• End of the month (after the last use of the vehicle on 

the last day of the month)

• After each purchase.

£ Tank Full Be^O/te PuAcfoue. refers to the level of fuel in the 

tank before fuel was added at the time of purchase. The percent of tank 

full before purchase was calculated by subtracting the proportion of the 

tank filled with newly purchased fuel (gallons purchased divided by the 

tank capacity in gallons) from the proportion of the tank full after 

purchase.

57
Pe/tcen£ Full Be/fltfeen Pu/LcfatAfc6 is the average of the percent of tank 

full after the earlier purchase and the percent full before the next 

purchase. It is given by:

where

(pa +Pb )/2,

p = the percent full after the earlier purchase; cl

and

Pk = the percent full before the next purchase.

One may consider the beginning of a month as "after a purchase" and the 

end as "before a purchase".

_____ Full VuSung a. Month, represents the average position of the 

vehicle's fuel guage during the month of recordkeeping and is derived 

for each vehicle from its average percents full between purchases. 

Suppose there are m purchases during a month, numbered 1 to m. Call the 

beginning of the month purchase number 0, and the end of the month 

purchase m + 1. Then the average percent full during the month is given 

by:

m

j=o

p = m

>

d

j 

J-0

where

p = the average percent full between purchases j and j+1 

and

di = the number of days between purchases j and j+1

The following diagram describes the fuel purchases and use for a vehicle 

for one 30-day month. Initially, the tank was three-quarters full. The 

first purchase, on the 15th day of the month, filled the tank halfway; 

the second purchase, on the 20th day, filled the tank completely. On 

the last day of the month the tank was half full.

58
The average percent of tank full for the first 15 days was (75+25)/2 or 

50; for the five days between the first and second purchases it was 

(50+0) 12 or 25; and for the last 10 days it was (100+50)/2 or 75. 

Averaging these values using the number of days between purchases as 

weights, we get p- = [(15 x 50 + 5 x 25 + 10 x 75)/30] « 54.2, approxi 

mately, as the average percent of the tank full for the month.

Percent of 

Tank Full

100--

Legend

& Known fuel levels 

——-A»«um.d chenget in fuel level 

Average percent of tenk Mi

10 16 20

Days of the Month

30

refers to the occasion when fuel is added to the vehicle's tank 

whether cash, check, or credit is used.

Rgftol refers to nonurban areas.

S>czg. 0)j 1/e.fo/ccl.g. refers to industry-defined categories based generally 

on the vehicle's intended market, body size, and body configuration. 

Vehicles are grouped into the following categories based on the year, 

make, and model of the vehicle: subcompact (for example, Vega, Pinto), 

compact (Nova, Maverick), intermediate (Malibu, Torino), full size 

(Impala, LTD), pickup (CIO, F100), and van (Maxivan, Econoline). 

Pickups and vans are included with full size and intermediate-size 

vehicles in the tables.

(itbfln includes housing in areas of 2,500 or more inhabitants as defined 

in the 1970 Census.

59
U6ed on the. Job means the vehicle was used on the job other than 

commuting to or from work.

t/fcfeccfcfcA are all motorized vehicles used by U.S. households for 

personal transportation excluding motorcycles, mopeds, large trucks, 

and buses. They include automobiles, station wagons, passenger vans, 

cargo vans, motor homes, pickup trucks, jeeps, or similar vehicles owned 

(being bought) by one or more members of the households. Vehicles also 

include company cars, pickup trucks, taxicabs, and other motorized 

vehicles that are not owned by household members but which are regularly 

available to household members for their personal use and are ordinarily 

kept at home. Cars rented or leased for one month or more are included.

Not included are motorized vehicles used solely for business purposes, 

such as police cars or other Government-owned vehicles. Dismantled or 

dilapidated vehicles in an early stage of being junked or immobile 

vehicles used only as a source of power for some piece of machinery are 

not included. Vehicles used primarily for competition or display pur 

poses such as racing cars, stock cars, or antique cars not used as 

passenger automobiles are not included. Vehicles kept by students who 

live away at school or kept by persons who reside on military bases or 

similar institutional settings are not included.

Note: In the NIECS interview, vehicles were defined to include motor 

cycles, mopeds, and motorized bicycles, large trucks, and buses, but 

these vehicles have been excluded from the Transportation Panel, and 

therefore do not appear in the definition of vehicles above.

60
DOE<2F 80)40' 2 U.S. DEPARTMENT OF ENERGY H*^^ 

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D Money order or rharae to my •••••I Tntal rh^rgps $ _ . _, , Fill in fhp hnxps below

Dpnnsit Arrnnnt NO 1 ————————— ="

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Order No. ——————————— ^p^ Month/Yea^1'5 U ——————

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PLEASE PRINT OR TYPE NAME AND ADDRESS 

NAME - FIRST. LAST

1 1 1 1 1 1 1 I 1 1 1 1 I 1 1 1 1 1 1 1 1 I 1 1 1 1 1 1 1

COMPANY NAME OR ADDITIONAL ADDRESS LINE 

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

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