Revision to ALLEGHENY COUNTY’S portion of the

PENNSYLVANIA STATE IMPLEMENTATION PLAN

For the

Maintenance of the Carbon Monoxide

National Ambient Air Quality Standards

Revision Tracking No. 69

Allegheny County Health Department

Air Quality Program

2011 Carbon Monoxide Limited Maintenance Plan
Table of Contents

1. Revision of Allegheny County’s Portion of the Pennsylvania 

State Implementation Plan: 

Carbon Monoxide Limited Maintenance Plan

2. Technical Support Document

3. Documentation of Public Hearing and Certifications

Public hearing notice

Transmittals of hearing notice to EPA & PA DEP

News Release

Proof of publication of notice of hearing

Certification of hearing

Summary of Comments and responses

Certification of approval and adoption
1. Revision of Allegheny County’s Portion of the Pennsylvania

State Implementation Plan

Revision to the State Implementation Plan

for Carbon Monoxide 

2011 Carbon Monoxide Limited Maintenance Plan

Allegheny County Health Department

Air Quality Program

June 2011
Page 4

EXECUTIVE SUMMARY

Significant progress continues to be made in reducing carbon monoxide (CO) levels across 

Allegheny County, including the Central Business District (CBD). The CBD is defined as the 

area enclosed by the Allegheny River, the Monongahela River, and I-579. Cleaner cars, 

equipment and fuels have reduced CO levels despite increases in vehicle miles traveled.

The two primary National Ambient Air Quality Standards (NAAQS) for CO are 9 parts per 

million (ppm) averaged over an 8-hour period, not to be exceeded more than once per year at 

each site, and 35 ppm averaged over a 1-hour period. The last time the 8-hour standard was not 

met in Allegheny County was in 1987 when a reading of 13.5 ppm was recorded. Exceeding the 

1-hour average standard is not likely to occur in Allegheny County given reduction in emissions 

from vehicular traffic. Air quality levels in Allegheny County have not exceeded the 1-hour 

standard since 1980, and have been below 15 ppm since 1988. 

Allegheny County Health Department (ACHD) submitted a State Implementation Plan (SIP) 

revision for CO under the limited maintenance plan option2. In that analysis, each redesignation 

criterion in Section 107(d)(3)(E) of the Clean Air Act (CAA or the Act) is listed, along with a 

short description of the guidance provided by Environmental Protection Agency (EPA)

1

,

2

in 

relation to that criterion, and the justification that supports the request for redesignation to 

attainment. Significantly, since the area is “not classified,” and has a design value below 7.65 

ppm, or 85 percent of the CO NAAQS, the County used EPA’s “Limited Maintenance Plan 

Option” in addressing Section 107(d)(3)(E)(iv). Additionally, because the area is “not 

classified,” the SIP submittal requirements of the CAA, Section 187, do not apply. The CBD 

was designated CO attainment status with an effective date of January 13, 2003.

ACHD is submitting a SIP revision to the EPA to revise the Carbon Monoxide Limited 

Maintenance Plan in accordance with Section 107(d) of the CAA to ensure maintenance of the 

NAAQS in the CBD of Allegheny County for a second ten-year period through year 2022. This 

ten-year plan maintains existing controls and contingency provisions, and succeeds the previous 

plan approved by the EPA in 2003. CO levels are expected to remain well below the NAAQS 

for the ten-year period ending 2022.

 

1

EPA Memo “Procedures for Processing Requests to Redesignate Areas to Attainment,” John 

Calcagni, September 4, 1992. 

2

EPA Memo “Limited Maintenance Plan Option for Nonclassifiable CO Nonattainment Areas,” 

Joseph W. Paisie, October 6, 1995.
Page 5

TABLE OF CONTENTS

EXECUTIVE SUMMARY ..........................................................................................................4

TABLE OF CONTENTS .............................................................................................................5

I. Introduction .......................................................................................................................6

II. Limited Maintenance Plan Option ..................................................................................7

III. Attainment Emissions Inventory and Mobile Source Control Measures ....................9

IV. Maintenance Demonstration ..........................................................................................11

V. Monitoring Network and Verification of Continued Attainment ..............................14

VI. Contingency Plan ............................................................................................................15

VII. Conformity Determinations under the Limited Maintenance Plan ...........................17

LIST OF TABLES

Table 1: 2013 Typical Winter Day Carbon Monoxide Emissions for Allegheny County .............9

Table 2: 2022 Typical Winter Day Carbon Monoxide Emissions for Allegheny County ...........10

LIST OF FIGURES

Figure 1: Forbes Avenue at Grant Street (Courthouse) ..............................................................11

Figure 2.a: Gateway Center Subway Entrance (Point) ...............................................................12

Figure 2.b: Flag Plaza (Bedford Ave.) .......................................................................................12

Figure 3: Oakland (416 Semple St.) ...........................................................................................13

LIST OF APPENDIXES

Appendix: Allegheny County Mobile Source Highway Emissions Inventory for Carbon 

 Monoxide (CO) NAAQS Explanation of Methodology ...........................................18
Page 6

I. Introduction

The Central Business District (CBD) of Allegheny County was designated as CO nonattainment 

area “not classified” at the time of enactment of the CAA and remained as nonattainment areas 

by operation of law.3 Based upon criteria established in the Act, the EPA delineated each 

nonattainment area and classified it using air monitoring data from 1988 and 1989.4 As a result 

of this delineation process, in Allegheny County, the “high traffic density areas within the CBD 

and certain other high traffic density areas” (of the Pittsburgh area) were designated 

nonattainment - not classifiable. The CBD is defined as the area enclosed by the Allegheny 

River, the Monongahela River, and I-579; while “other high traffic density areas” describes what 

is considered the Oakland neighborhood of Pittsburgh.

In keeping with federal, state and local requirements, Allegheny County Health Department 

(ACHD) addresses the air quality issues within the CBD. Failure to meet the requirements of the 

Clean Air Act (CAA or the Act) can result in economic sanctions and/or civil lawsuits.

The 2001 CO Limited Maintenance Plan for the CBD of Allegheny County showed how the 

region would continue to attain the standard through 2013. The continuous downward trend in 

CO monitor readings in the CBD has demonstrated these improvements can be attributed to 

permanent, enforceable reductions of CO emissions despite growth in vehicle miles traveled. 

These reductions are largely achieved through more stringent federal controls on vehicles and 

fuels, and state and local measures in the CO Limited Maintenance Plan.

The CAA requires that a second SIP revision be submitted within eight years of redesignation to 

demonstrate that the area will maintain the standard for another ten years. This update must 

comply with the Act’s requirements in section 175(A) for maintenance plans, by including:

Air quality data that demonstrate the area continues to be in attainment

On-road mobile source emissions forecasts

Continued air monitoring to verify the attainment status of the region

Contingency emission reduction measures that decrease CO emissions, as necessary 

after a trigger event

 

3

42 U.S.C.A. § 7407(d)(1)(C)

4

56 Fed. Reg. 56694
Page 7

II. Limited Maintenance Plan Option

The “Limited Maintenance Plan Option for Nonclassifiable CO Nonattainment Areas” EPA 

guidance document from Joseph Paisie, Oct. 6, 1995 lists the core requirements for this plan as 

follows: 

Attainment Inventory

The State (County) should develop an attainment emissions inventory to identify a level of 

emissions in the area which is sufficient to attain the CO NAAQS. This inventory should be 

consistent with EPA’s most recent guidance on emissions inventories for nonattainment areas 

available at the time and should represent emissions during the time period associated with the 

monitoring data showing attainment. The inventory should be based on actual “typical winter 

day” emissions of CO.

Maintenance Demonstration

The maintenance demonstration requirement is considered to be satisfied if the monitoring data 

show that the area is meeting the air quality criteria for limited maintenance areas (7.65 ppm or 

85 percent of the CO NAAQS). There is no requirement to project emissions over the 

maintenance period. The EPA believes if the area begins the maintenance period at or below 85 

percent of the exceedance levels, the air quality, along with the continued applicability of 

Prevention of Significant Deterioration (PSD) requirements, and any control measures already in 

the SIP and Federal measures, should provide adequate assurance of maintenance over the initial 

ten-year maintenance period. When EPA approves a limited maintenance plan, EPA is 

concluding that an emissions budget may be treated as essentially not constraining for the length 

of the maintenance period, because it is unreasonable to expect that such an area will experience 

much growth in that period that a violation of the CO NAAQS would result.

Monitoring Network and Verification of Continued Attainment

To verify the attainment status of the area over the maintenance period, the maintenance plan 

should contain provisions for continued operation of an appropriate, EPA-approved air quality

monitoring network, in accordance with 40 CFR part 58. This is particularly important for areas 

using a limited maintenance plan, because there is no cap on emissions.

Contingency Plan

Section 175(A) of the CAA requires that a maintenance plan include contingency provisions, as 

necessary, to promptly correct any violation of the NAAQS that occurs after redesignation of the 

area. These contingency measures do not have to be fully adopted at the time of redesignation. 

However, the contingency plan is considered to be an enforceable part of the SIP and should 

ensure that the contingency measures are adopted expeditiously once they are triggered by a 

specified event. The contingency plan should identify the measures to be promptly adopted and 

provide a schedule and procedure for adoption and implementation of the measures. The state 

also should identify specific indicators, or triggers, which will be used to determine when the 

contingency measures need to be implemented. While a violation of the NAAQS is an 

acceptable trigger, states may wish to choose a pre-violation action level as a trigger, such as an 

exceedance of the NAAQS. By taking early action, a state may be able to prevent any actual 
Page 8

violation of the NAAQS, therefore eliminating any need on the part of the EPA to redesignate an 

area back to nonattainment.

Conformity Determinations under the Limited Maintenance Plan

The transportation conformity rule and the general conformity rule apply to nonattainment areas 

and maintenance areas operating under the maintenance plans. Under either rule, one means of 

demonstrating conformity of federal actions is to indicate that expected emissions from planned 

actions are consistent with the emissions budget for the area. Emission budgets in limited 

maintenance plan areas may be treated as essentially not constraining for the length of the initial 

maintenance period, because it is unreasonable to expect that such an area will experience so 

much growth in that period that a violation of the CO NAAQS would result. In other words, 

EPA would be concluding that emissions need not be capped for the maintenance period. 

Therefore, in areas with approved limited maintenance plans, federal actions requiring 

conformity determinations under the transportation conformity rule could be considered to 

satisfy the “budget test” required in the conformity rule.
Page 9

III. Attainment Emissions Inventory and Mobile Source Control Measures

The dominant source of CO emissions is from on-road motor vehicles. Other contributing 

sources include nonroad mobile emissions, which include lawn and garden equipment and 

construction equipment, as well as area and point sources such as wood burning and cement 

production. Although CO emissions are also the result of point, area, and nonroad sources, the 

CO inventory only includes emissions from on-road (highway) sources, since motor vehicles are 

still the primary source in the CBD. Finally, note that the data is representative of the “typical 

winter day,” and was modeled with MOVES20105. Table 1 illustrates the CO emissions for a 

typical winter day in 2013 and Table 2 illustrates the CO emissions for a typical winter day in 

2022. 

Table 1: 2013 Typical Winter Day Carbon Monoxide Emissions for Allegheny County

MOVES Road Type Emission 

Components VMT

Average 

Speed

(mph)

CO 

Emissions 

(kg/day)

CO 

Emissions 

(tons/day)

Rural Restricted Access 

(Freeway)

Running 

Exhaust

0 0.0 0 0.00

Rural Unrestricted Access 

(Non-Freeway) 376,491 48.6 1,461 1.61

Urban Restricted Access 

(Freeway) 8,518,382 56.8 43,218 47.64

Urban Unrestricted 

Access (Non-Freeway) 16,832,658 28.0 70,779 78.02

Off-Roadway

Start Exhaust 

/ Extended 

Idle

----- ----- 242,454 267.26

TOTAL 25,727,530 33.9 357,912 394.53

 

5 Allegheny County Mobile Source Highway Emissions Inventory for Carbon Monoxide (CO) NAAQS: 

Explanation of Methodology, Michael Baker, JR., Inc., July 07, 2010. 
Page 10

Table 2: 2022 Typical Winter Day Carbon Monoxide Emissions for Allegheny County

MOVES Road Type Emission 

Components VMT

Average 

Speed

(mph)

CO 

Emissions 

(kg/day)

CO 

Emissions 

(tons/day)

Rural Restricted Access 

(Freeway)

Running 

Exhaust

0 0.0 0 0.00

Rural Unrestricted 

Access (Non-Freeway) 370,158 48.7 1,043 1.15

Urban Restricted Access 

(Freeway) 10,442,966 50.1 41,204 45.42

Urban Unrestricted 

Access (Non-Freeway) 17,564,607 27.4 51,474 56.74

Off-Roadway

Start Exhaust 

/ Extended 

Idle

----- ----- 211,338 232.96

TOTAL 28,377,731 33.1 305,059 336.27

As CO emissions have decreased over the last decade so have the monitored levels of CO. The 

Maintenance Demonstration has graphical evidence of the decreasing CO levels since 1988.
Page 11

IV. Maintenance Demonstration

The Allegheny County Health Department (ACHD) monitors ambient CO concentrations at Flag 

Plaza. ACHD used to monitor the ambient CO concentration at the Gateway Center Subway 

Entrance (Point), but the monitor was removed in May 2000 due to construction in that area. 

The 1-hour NAAQS for CO is 35 ppm. The NAAQS has not been violated in the CBD since 

1980, and has been below 15 ppm since 1988. The 8-hour NAAQS for CO is currently set at 9 

ppm, not to be exceeded more than once per year at each site. Observation of the second highest 

8-hour concentration is an indicator of the region’s proximity to violating the standard. The data 

presented in Figures 1-3 include the maximum and second highest non-overlapping 8-hour 

averages for the monitor stations from 1988 through 2009 in the CBD. The highest 8-hour 

average CO concentration measured was 8.6 ppm at the Oakland monitor in 1988. The highest 

8-hour average CO concentration measured since 2000 was 3.7 ppm at the Forbes Avenue at 

Grant Street (Courthouse) in 2007. The 8-hour standard was last violated in 1987 and no 8-hour 

average CO concentration above the 85 percent of the NAAQS or 7.65 ppm has been recorded at 

any monitoring station since 1994.

0

1

2

3

4

5

6

7

8

9

10

1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008

Eight Hour Average (PPM)

Year

Figure 1

Forbes Avenue at Grant Street (Courthouse)

Standard

Maximum

Second 

Highest
Page 12

0

1

2

3

4

5

6

7

8

9

10

1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000

Eight Hour Average (PPM)

Year

Figure 2.a

Gateway Center Subway Entrance (Point)

Standard

Maximum

Second 

Highest

Monitor was taken 

out of service in 

May 2000.

0

1

2

3

4

5

6

7

8

9

10

2003 2005 2007 2009

Eight Hour 

Average (PPM)

Year

Figure 2.b

Flag Plaza (Bedford Ave.)

Standard

Maximum

Second Highest

Monitor was put in service in 

2003 to replace the Gateway 

Center Subway Entrance 

monitor.
Page 13

0

1

2

3

4

5

6

7

8

9

10

1988 1990 1992 1994 1996

Eight Hour 

Average (PPM)

Year

Figure 3

Oakland (416 Semple St.)

Standard

Maximum

Second Highest

Monitor was taken out of service 

in October 1997.
Page 14

V. Monitoring Network and Verification of Continued Attainment

ACHD operates and maintains a CO monitoring network which meets the requirements of 40 

CFR Parts 53 and 58. 

Name AIRS Monitor ID Site ID

Forbes Avenue at Grant Street (Courthouse) 420030038421011 0038

Flag Plaza (Bedford Ave.) 420030031421011 0031

Air quality measurements used in this analysis were performed in accordance with the 

appropriate regulations and guidance documents including adherence to EPA quality assurance 

requirements. Monitoring procedures were determined in accordance with 40 CFR Part 58. The 

CO monitoring instruments send the information to the Allegheny County Health Department’s 

computer system at the Air Quality Program building at 301 39th Street.

The CO monitor at the Oakland 4 site was terminated in October 1997. The CO monitor at the 

Gateway Center Subway Entrance (Point) was taken out of service by the ACHD in May 2000 to 

accommodate local construction work. With permission of EPA, ACHD has since decided to 

permanently remove the monitor from this location and relocate at Flag Plaza near the Civic 

Arena. In this location it will function as a population based CO monitor. However, in keeping 

with SIP requirements, ACHD will continue to operate the CO monitor at Forbes Avenue and 

Grant Street. The monitor will be operated in accordance with 40 CFR Part 58 to verify 

attainment status of the area and to indicate the need to establish contingency measures as 

described in the contingency plan included as a part of this submittal. 

Ambient CO concentrations continue to be low, currently at a third of the 8-hour CO NAAQS. 

With the emphasis on monitoring CO levels to indicate trigger events, the network provides data 

representative of concentrations of CO in the ambient air and tracks maximum expected 

concentrations.
Page 15

VI. Contingency Plan

The contingency plan provides a procedure to prevent future violations and promptly correct any 

violation of the CO NAAQS that occurs after the renewal of the CO Limited Maintenance Plan 

for another ten years. The contingency plan is considered to be a federally enforceable part of 

the SIP. This contingency plan ensures that appropriate measures are implemented expeditiously 

once they are triggered by a specific event. An event triggering the contingency plan is specified 

at the CO NAAQS or 9.0 ppm to ensure that additional control measures are implemented before 

a violation of the standard occurs or is imminent. This contingency plan identifies measures that 

can be promptly adopted and implemented by following the procedures specified below.

Triggering Indicator

The following process is used to define the trigger indicator and to evaluate the need for 

contingency measures to avoid any CO NAAQS violations. Allegheny County Health 

Department will rely on quality assured air monitoring data in the CBD to track future 

compliance and determine the need to establish then implement contingency measures. A 

verified ambient CO level over the CO NAAQS or 9.0 ppm for an 8-hour period must be 

recorded at least twice at one monitor station during the CO season, November through 

February, to be considered a triggering indicator. Using all the data available, ACHD staff will 

make a determination and recommendation to implement contingency measures to assure that the 

CO NAAQS will not be violated.

Contingency Measures

In the event that a violation of the CO standard occurs at the Forbes Avenue and Grant Street 

(Courthouse) monitor, a “vehicle idling restriction” will be implemented. This restriction will 

limit the amount of time that a gasoline engine will be permitted to idle to five (5) minutes, with 

appropriate exceptions (such as the need for heating and powering of refrigeration systems on 

trucks, operation of emergency vehicles and vehicles that are motionless due to traffic conditions 

beyond the operator’s control). The restriction on idling will be limited to the winter season, 

November through February.

Such a measure will be implemented on the following schedule once notification is received 

from EPA that a contingency measure must be implemented, or three months after a recorded 

violation:

a) Applicable “vehicle idling restriction” regulation to be adopted within 12 months.

b) Applicable regulation to be implemented within 8 months after adoption.
Page 16

Alternative Contingency Measure

The Allegheny County Health Department reserves the right to petition the EPA, at any time, for 

approval to establish an alternative contingency measure, or combination of measures, to that of 

the “vehicle idling restriction,” subject to demonstrating to the satisfaction of the EPA that the 

alternative measure(s) being proposed would provide an air quality and public health benefit 

equal to or greater than that resulting from the implementation of the idling restriction described 

above.

This contingency plan is consistent with that approved for the first ten-year CO Limited 

Maintenance Plan.
Page 17

VII. Conformity Determination under the Limited Maintenance Plan

Under a limited maintenance plan, continued timely implementation of transportation control 

measures, consultation and maintenance of CO emissions below the NAAQS is required. With 

an approved limited maintenance plan, it is presumed that ACHD has demonstrated that it would 

be unreasonable to expect a violation of the CO NAAQS from growth in vehicle emissions for 

that period.

Evaluation of transportation conformity for transportation projects in Allegheny County is 

performed by the Southwestern Pennsylvania Commission and other agencies. Such projects in 

the county are eligible to take advantage of the reduced requirements under the limited 

maintenance plan option for nonclassifiable CO nonattainment areas.
Page 18

Appendix

Allegheny County 

Mobile Source Highway Emissions Inventory for 

Carbon Monoxide (CO) NAAQS

Explanation of Methodology

July 2010

 Prepared for:

Mobile Sources Section, Bureau of Air Quality

Pennsylvania Department of Environmental Protection

PO Box 8468

Harrisburg, PA 17105-8468

Allegheny County Health Department

Air Quality Program

301 39th Street, Bldg. #7

Pittsburgh, PA 15201-1891

 Prepared by:

Michael Baker, Jr., Inc.

1304 Concourse Drive

Linthicum, MD 21090
Page 19

Allegheny County Mobile Source Highway CO Emissions Inventory

Explanation of Methodology

July 2010

Table of Contents

INTRODUCTION .....................................................................................................................................................20

TOOLS AND METHODOLOGY............................................................................................................................20

DATA ASSUMPTIONS ............................................................................................................................................23

TRAFFIC DATA ........................................................................................................................................................23

TRAFFIC GROWTH ASSUMPTIONS............................................................................................................................25

VEHICLE POPULATION.............................................................................................................................................25

FLEET AGE DATA ....................................................................................................................................................26

I/M PARAMETERS ....................................................................................................................................................27

FUEL PARAMETERS..................................................................................................................................................29

WEATHER DATA......................................................................................................................................................29

VEHICLE TECHNOLOGY ...........................................................................................................................................30

EMISSION TABLES ..............................................................................................................................................331

MOVES INPUT/OUTPUT SPECIFICATION FILES..............................................................................................322

RESOURCES.............................................................................................................................................................40

List of Exhibits

EXHIBIT 1: SUMMARY OF INVENTORY ANALYSIS TOOLS..........................................................................................211

EXHIBIT 2: EMISSION CALCULATION PROCESS ...........................................................................................................22

EXHIBIT 3: ESTIMATING VMT BY VEHICLE TYPE.......................................................................................................24

EXHIBIT 4: VMT GROWTH RATES...............................................................................................................................25

EXHIBIT 5: COUNTY VEHICLE POPULATION ASSUMPTIONS .........................................................................................26

EXHIBIT 6: COUNTY VEHICLE AGE PERCENTAGES ......................................................................................................27

EXHIBIT 7: I/M PARAMETERS ......................................................................................................................................28

EXHIBIT 8: FUEL PARAMETERS ....................................................................................................................................29

EXHIBIT 9: JANUARY TEMPERATURE AND HUMIDITY PARAMETERS ............................................................................29

EXHIBIT 10: 2013 ALLEGHENY COUNTY CO EMISSIONS..............................................................................................31

EXHIBIT 11: 2022 ALLEGHENY COUNTY CO EMISSIONS..............................................................................................31
Page 20

INTRODUCTION

The United States Environmental Protection Agency (EPA) originally designated a portion of Allegheny 

County as a carbon monoxide (CO) nonattainment area. The area is defined as the Pittsburgh central 

business district (CBD) triangle bounded by the Allegheny River, the Monongahela River and I-579. In 

addition, the Oakland neighborhood of Pittsburgh was included under the category of “other high traffic 

density areas”. 

Effective January 13, 2003, EPA approved the Allegheny County and Pennsylvania Department of 

Environmental Protection (DEP) request and maintenance plan to redesignate the nonattainment area to

attainment of the CO National Ambient Air Quality Standards (NAAQS). The maintenance plan provides 

a county-level emissions inventory for the 1990 and 1999 analysis years. 

Per section 175A(b) of the Clean Air Act, eight years after the redesignation, a revised maintenance plan 

must be submitted to EPA that demonstrates attainment for the 10 years following the initial 10-year 

period. This inventory supports that requirement and provides a CO emissions inventory for Allegheny 

County for the 2013 and 2022 analysis years.

TOOLS AND METHODOLOGY

The CO emissions inventory for Allegheny County has been prepared using county-specific weather, 

vehicle fleet, fuel and traffic data. On March 2, 2010, EPA officially approved the MOVES2010 

(referred herein as MOVES) emission model for use in the development of state implementation plans 

(SIPs) and transportation conformity analyses. MOVES, which stands for Motor Vehicle Emissions 

Simulator, is the latest generation of highway vehicle emissions inventory models. It provides emission 

factors based on local-specific inputs. Per EPA’s Policy Guidance on the Use of MOVES2010 for State 

Implementation Plan Development, Transportation Conformity, and Other Purposes, EPA-420-B-09-046, 

December 2009, EPA recommends that MOVES be used for SIP development as expeditiously as 

possible. As a result, the MOVES emissions model has been used to produce the Allegheny CO mobile 

source emissions inventory.

The Allegheny CO inventory utilizes the latest available planning assumptions and follows the same 

analysis approach as used for other SIP inventories across the state, with the exception of the integration 

of the MOVES emission model. This includes using a custom post processing software (PPSUITE) to 

assist in processing Pennsylvania Department of Transportation (PennDOT) roadway traffic data and 

applying the results produced by MOVES. PPSUITE has been used throughout Pennsylvania and other 

states and has been updated to provide full integration capabilities with MOVES. In addition, the 

CENTRAL software system is used as the process controller providing interactive menus and features to 

execute the MOVES model in batch mode. MOVES is executed using run specification (MRS) files, 

which facilitates running the model for multiple analysis years. Exhibit 1 summarizes the analysis tools 

used for developing the inventory.
Page 21

Exhibit 1: Summary of Inventory Analysis Tools

Tool Purpose

MOVES2010 Produces emission factors for CO; apply emission 

factors to VMT; produce emission quantities

PPSUITE

Processes the highway data; calculates hourly 

congested speeds for each state roadway segment; 

prepares MOVES traffic-related input files; processes 

MOVES output files and prepares summary report

CENTRAL

Provides framework to manage work tasks and 

provide QA/QC features. Builds MOVES MRS files 

based on user inputs and selections and executes 

emission calculation process.

Exhibit 2 illustrates the analysis framework used for the inventory. PPSUITE is used to process 

PennDOT traffic count data forecasted to future analysis years. The software calculates hourly congested 

speeds for each roadway segment and prepares the key traffic-related inputs to MOVES. Other MOVES 

input data is prepared manually. This includes inspection maintenance parameters, fuel characteristics, 

vehicle age distributions, and meteorology data. 

The MOVES model is executed in two steps. The first step imports the county-specific data into the 

MOVES MySQL databases. MySQL is a relational database system used by MOVES. The second step 

executes MOVES to estimate and apply emission factors. MOVES was run in the “inventory” mode as 

described in EPA’s Technical Guidance on the Use of MOVES2010 for Emission Inventory Preparation 

in State Implementation Plans and Transportation Conformity, EPA-420-B-10-023, April 2010 

(http://www.epa.gov/otaq/models/moves/index.htm). The inventory mode requires input vehicle miles of 

travel (VMT) and vehicle population (e.g. number of vehicles in county), which the model uses to 

calculate total emission quantities for the county.

MOVES produces emissions for defined road types internal to the model. These include:

Off-Network 

Rural Restricted Access (e.g. freeway)

Rural Un-Restricted Access (e.g. non-freeway)

Urban Restricted Access 

Urban Un-Restricted Access

The off-network category includes emissions not associated with the travel of the vehicle. This includes 

engine start emissions, resting evaporative emissions and soak emissions when a vehicle is parked. The 

remaining road type categories represent the emissions associated with vehicle operation on different road 

classes based on the input speeds. These emissions include running exhaust and crankcase running 

exhaust emissions.

The PPSUITE software extracts the emission quantities from the MySQL databases and prepares 

emission report files that can be used for tabulations.
Page 22

Exhibit 2: Emission Calculation Process

PennDOT RMS 

Traffic Data

PPSUITE

Network 

Calculations

PennDOT

Growth Rates

Highway 

Link 

Database

PPSUITE

Prepare 

MOVES Inputs

•Hourly Pattern

•Vehicle Type Pattern

•Vehicle Effects on Cap

•Speed/Cap Lookup

VMT Adjustments

Daily

Monthly

Off-model

Vehicle Type / 

Source Type 

Mapping

County-Level MOVES Traffic 

Inputs:

(1) Speed Bins

(2) Annual VMT

(3) RoadType Fractions

(4) SourceType Pop

Default 

MOVES VMT / 

SourceType Pop

Spreadsheets / 

Convertors

County-Level MOVES Traffic 

Inputs:

(1) I/M

(2) Age Distributions

(3) Fuel ID / Formulation

(4) Meteorology

(5) Hourly VMT Fractions

(6) Month Fractions

(7) Daily Fractions

(8) Ramp Fractions

PPSUITE Generated

User Generated

A

MOVES

Load CountyLevel Data

A

CENTRAL

Create 

xx .XML

Create 

xx .MRS

PPSUITE

Summarize

Emissions

MOVES

Run County 

Emissions

MOVES 

Emissions MYSQL 

Database

ASCII 

Emission 

Report
Page 23

DATA ASSUMPTIONS

This section summarizes the key data sources and parameters used to produce the Allegheny County CO 

emissions inventory for the 2013 and 2022 analysis years. The methodologies used to produce the 

emission results conform to the recommendations provided in the EPA MOVES policy and technical 

guidance documents referenced in the previous section. A mix of local data and national default (internal 

to MOVES) data has been used for this submission. Local data has been used for the primary data items 

that have a significant impact on emissions. These include:

VMT and speeds

Vehicle type mixes

Vehicle age distributions 

Temperatures/humidity 

Inspection/maintenance parameters 

Fuel program characteristics 

Traffic Data 

The PennDOT Roadway Management System (RMS) data serves as the primary highway data source for 

the county and functional class VMT estimates. The data source is used to provide a “snapshot” of the 

regional roadway system and volumes in 2008. The data includes the average annual daily traffic 

(AADT) volumes for all state roadways in Pennsylvania. The portion of travel on freeway ramps is 

assumed to be 8% of the total freeway VMT, which is the internal MOVES national default value. To

account for additional local roadway VMT and to ensure consistency with reported HPMS totals, the 

2008 VMT has been reconciled with the Allegheny County 2008 HPMS VMT totals reported to the 

Federal Highway Administration (FHWA). 

PPSUITE calculates congested speeds by hour of the day for each roadway segment and provides the 

information as input to the MOVES software. To disaggregate the daily RMS volumes to hourly 

volumes, auto and truck hourly pattern data from PennDOT’s 2008 Pennsylvania Traffic Data report are 

used to determine the temporal variations of future year traffic volumes.

The Allegheny CO inventory is calculated for a typical January weekday. The daily and monthly 

seasonal factors, used to adjust the AADT traffic volumes, are developed from data contained in the 

document, 2008 Pennsylvania Traffic Data, as prepared by PennDOT’s Bureau of Planning and 

Research. The seasonal and daily factors provided in this document are based on statistical analyses of 

2008 traffic counts taken at permanent and in-pavement automatic traffic recorder locations throughout 

the state. The factors are used to adjust AADT volumes to an average January weekday, and the 

PPSUITE software calculates unique congested speeds for each roadway segment.

Vehicle mix patterns are percentages used to split the total traffic volume into each of the vehicle types 

required by the MOVES emission model. This input is important since the MOVES emission rates vary 

significantly by vehicle type. The vehicle mix percentages were calculated for each functional class 

grouping in Allegheny County utilizing a combination of sources as illustrated in Exhibit 3. 
Page 24

MOVES calculates emission factors for 13 separate vehicle categories, referred to as source types: 

Motorcycle

Passenger Car

Passenger Truck

Light Commercial Truck

Intercity Bus

Transit Bus

School Bus

Refuse Truck

Single Unit Short Haul Truck

Single Unit Long Haul Truck

Motor Home

Combination Unit Short Haul Truck

Combination Long Haul Truck

The EPA MOVES technical guidance was followed to split traffic volumes into the 13 MOVES source 

types based on available data sources. Appendix A.2 of the MOVES technical guidance provides a 

methodology to map the 28 MOBILE6.2 vehicle types to the 13 MOVES source type definitions.

Exhibit 3: Estimating VMT by Vehicle Type
Page 25

Traffic Growth Assumptions 

The base year 2008 RMS traffic volumes and VMT were factored to the 2013 and 2022 forecast analysis 

years. For this inventory, the growth rates were based on the VMT growth rate projection methodology 

developed by PennDOT as documented in the report “Statistical Evaluation of Projected Traffic Growth, 

Traffic Growth Forecasting System: Final Report, March 14, 2005”. As part of that study, a statewide 

traffic growth forecasting system was developed that incorporates traffic data from PennDOT’s Traffic 

Information System and available socioeconomic forecasts. The study methodology has been shared 

among PennDOT, DEP, and other interagency consultation group members, including the Pennsylvania 

Air Quality Work Group (which includes EPA, FHWA, and representatives from larger PA Metropolitan 

Planning Organizations (MPOs). 

The data inputs to the traffic growth forecasting system are periodically updated to produce revised 

forecast growth factors for each county in the state. The frequency of this update is at least every 5 years. 

The most recent available forecasts, used in the development of this inventory, include historic HPMS 

VMT through 2008 and use of the 2008 State Profile, developed by Woods & Poole Economics. The 

2008 State Profile includes historical demographic data and forecasts by year from 1969 through 2030 for 

every county and Metropolitan Statistical Area (MSA) in Pennsylvania. The county VMT forecast 

growth rates are developed for four types of functional roadway classifications in each county: urban 

interstate, urban non-interstate, rural interstate and rural non-interstate. 

Exhibit 4 summarizes the VMT growth for each analysis year used for the Allegheny CO inventory.

Exhibit 4: VMT Growth Rates

Year

January 

Weekday 

VMT

Annualized 

Growth Rate 

from 2008

1990

(from original maintenance plan) 21,968,249 -----

1999

(from original maintenance plan) 22,928,996 -----

2008 

RMS/HPMS 24,176,359 -----

2013 25,727,530 1.25%

2022 28,377,731 1.15%

Vehicle Population 

The MOVES emission model requires input vehicle population (the number of vehicles in the region) to 

calculate the vehicle start and evaporative emissions. In MOBILE6.2, start and evaporative emissions 

were related to VMT. The EPA MOVES technical guidance provides several options for developing this 

data. One option includes the use of state vehicle registration data; however, some further research is 

needed to determine the accuracy of this data for heavy-duty vehicle types and for application within 

MOVES. Many large trucks that travel in Pennsylvania may not be registered in the state or county since 

many of these trucks are based out-of-state or travel farther than 500 miles per trip. In addition, many 

registered vehicles may not operate on particular days of the year (in this case a January weekday). For 
Page 26

example, registered motor homes, classic cars, and specialized trucks may only operate on certain days or 

seasons. 

For this Allegheny CO inventory, vehicle population numbers were estimated using an alternative 

approach provided in the MOVES technical guidance. A default national MOVES run was conducted to 

determine the typical daily miles per vehicle for each MOVES vehicle type (e.g. a typical passenger car 

travels on average about 35 miles per day). These values were used to convert Allegheny County VMT 

by vehicle type to an estimate of vehicle population as follows:

Vehicle PopulationBy Vehicle Type = (VMTBy Vehicle Type / Avg Daily Miles Per VehicleBy Vehicle Type )

Exhibit 5 summarizes the resulting estimate of vehicle population for each analysis year. A comparison 

was made to the 2008 Allegheny County vehicle registration data obtained from PennDOT’s Department 

of Motor Vehicles (DMV) to ensure calculated values are reasonable.

Exhibit 5: County Vehicle Population Assumptions

Year Vehicle 

Population

2008 Registrations 

(for Allegheny County from 

DMV registration data)

851,394

2008 (Calculated from VMT) 810,050

2013 (Calculated from VMT) 856,150

2022 (Calculated from VMT) 916,116

Fleet Age Data 

Vehicle age distribution files are developed for MOVES model runs based on registered vehicles that 

reflect July 1 summer conditions. These distributions reflect the percentage of vehicles in the fleet up to 

30 years old. 

For this inventory, 2008 vehicle age distributions (in MOBILE6.2 format) have been compiled for 

Allegheny County based on data obtained from the PennDOT DMV vehicles registration database. Due 

to insufficient registration data available for heavy-duty vehicles, as discussed above, only data for lightduty vehicles are used as local inputs. The heavy-duty vehicles use the internal MOBILE6.2 defaults. 

Using EXCEL spreadsheet convertors developed by EPA (http://www.epa.gov/otaq/models/moves/tools.htm), 

the MOBILE6.2 formatted age distributions were converted to files compatible with MOVES. The 

vehicle age distributions by vehicle type are summarized in Exhibit 6.
Page 27

Exhibit 6: County Vehicle Age Percentages

Age 

Yrs

Light Car

Light Truck

Light 

Commercia

l Truck

Intercity 

Bus

Transit BusSchool Bus

Refuse 

Truck

Single Unit 

Short Haul 

Truck

Single Unit 

Long Haul 

Truck

Motor 

home

Combo 

Short Haul 

Truck

Combo 

Long Haul 

Truck

Motorcycle

0 5.9% 3.1% 3.3% 6.4% 5.4% 6.2% 4.8% 5.8% 8.1% 6.1% 5.4% 7.0% 4.0%

1 7.6% 4.3% 4.8% 6.4% 5.4% 6.2% 4.8% 5.8% 8.1% 6.1% 5.5% 7.0% 8.3%

2 7.1% 4.8% 5.1% 6.4% 5.4% 6.2% 4.8% 5.8% 8.1% 6.1% 5.8% 7.5% 9.7%

3 8.2% 5.7% 5.9% 6.4% 5.4% 6.2% 4.8% 5.8% 8.0% 6.1% 5.7% 7.4% 8.6%

4 8.2% 6.3% 6.3% 5.8% 4.9% 5.6% 4.4% 5.3% 7.4% 5.5% 5.0% 6.5% 6.6%

5 8.3% 6.9% 6.8% 4.9% 4.1% 4.7% 3.7% 4.4% 6.2% 4.6% 3.8% 4.9% 8.8%

6 8.1% 6.4% 6.3% 4.5% 3.8% 4.3% 3.4% 4.1% 5.7% 4.3% 3.5% 4.6% 6.1%

7 6.9% 6.3% 6.1% 4.9% 4.1% 4.8% 3.7% 4.5% 6.2% 4.7% 3.7% 4.8% 5.5%

8 7.1% 7.4% 7.1% 5.6% 4.7% 5.4% 4.2% 5.1% 7.1% 5.4% 5.5% 7.1% 5.3%

9 5.9% 5.8% 5.7% 5.7% 4.8% 5.5% 4.3% 5.1% 7.2% 5.4% 6.6% 8.5% 4.2%

10 4.9% 5.4% 5.2% 4.4% 5.6% 4.4% 3.3% 4.1% 5.7% 3.2% 5.0% 6.5% 3.2%

11 4.3% 5.1% 4.9% 3.6% 5.2% 4.1% 2.7% 3.1% 4.4% 5.0% 4.1% 5.3% 2.5%

12 3.4% 3.6% 3.5% 3.0% 4.9% 3.6% 5.8% 3.4% 2.2% 3.1% 3.5% 5.1% 2.4%

13 3.2% 4.1% 4.0% 3.9% 4.0% 4.6% 6.7% 3.9% 2.2% 3.7% 4.5% 5.1% 2.0%

14 2.5% 4.6% 4.4% 3.1% 3.6% 2.3% 4.2% 3.8% 3.5% 3.6% 3.6% 3.3% 1.6%

15 1.9% 3.3% 3.2% 2.6% 3.0% 2.8% 3.6% 2.8% 2.6% 2.5% 3.0% 2.5% 1.5%

16 1.4% 2.7% 2.6% 1.9% 2.7% 2.3% 1.6% 2.2% 0.6% 2.3% 2.2% 1.5% 1.1%

17 1.1% 2.5% 2.5% 2.2% 2.7% 2.9% 4.3% 2.1% 0.4% 1.7% 2.6% 1.1% 0.9%

18 0.9% 2.0% 2.0% 2.5% 4.0% 3.3% 3.7% 2.5% 2.0% 2.2% 2.9% 1.1% 1.0%

19 0.7% 2.1% 2.0% 2.5% 3.1% 1.9% 2.9% 3.2% 2.1% 2.9% 2.9% 1.1% 0.9%

20 0.5% 2.0% 1.9% 2.4% 2.5% 2.3% 4.0% 2.8% 1.4% 2.6% 2.7% 0.9% 0.8%

21 0.4% 1.2% 1.2% 2.5% 2.3% 2.4% 3.2% 2.3% 0.3% 2.6% 2.9% 0.3% 1.0%

22 0.3% 0.9% 1.0% 2.1% 2.0% 2.1% 4.0% 2.8% 0.1% 1.9% 2.4% 0.3% 1.8%

23 0.2% 0.7% 0.8% 1.9% 1.7% 1.8% 2.1% 2.0% 0.2% 2.1% 2.2% 0.3% 1.5%

24 0.2% 0.6% 0.7% 1.5% 1.3% 1.4% 2.3% 1.1% 0.2% 2.1% 1.7% 0.2% 1.3%

25 0.2% 0.5% 0.5% 0.6% 1.3% 0.5% 0.7% 1.8% 0.0% 1.4% 0.7% 0.0% 1.1%

26 0.1% 0.4% 0.5% 0.5% 0.7% 0.4% 0.7% 0.9% 0.1% 0.8% 0.6% 0.0% 1.0%

27 0.1% 0.3% 0.4% 0.4% 0.3% 0.5% 0.7% 0.9% 0.0% 0.5% 0.5% 0.1% 0.9%

28 0.1% 0.2% 0.3% 0.6% 0.8% 0.5% 0.2% 0.9% 0.0% 0.1% 0.7% 0.0% 0.8%

29 0.1% 0.2% 0.3% 0.3% 0.2% 0.4% 0.2% 0.7% 0.0% 0.5% 0.4% 0.0% 0.7%

30 0.0% 0.7% 0.7% 0.4% 0.1% 0.5% 0.2% 1.0% 0.2% 1.0% 0.5% 0.0% 5.0%

I/M Parameters 

The inspection maintenance (I/M) program inputs to MOVES are based on the current program that 

covers Allegheny County. The Commonwealth’s I/M program was upgraded and expanded throughout 

the state with a phase-in period starting in December 2003 and fully implemented by June 2004. The 

program test requirements vary by region and include on-board diagnostics (OBD) technology that uses 

the vehicle’s computer for model years 1996 and newer to download potential engine problems that could 

affect emissions. The program, named PAOBDII, is implemented in the Philadelphia, Pittsburgh, and 
Page 28

South Central / Lehigh Valley Regions. Exhibit 7 summarizes the key I/M inputs to the MOVES 

emission model for Allegheny County.

Exhibit 7: I/M Parameters

Test 

Standards SourceType Year Inspect Freq

Fuel 

Type Pol Process

Begin 

Model 

Year

End 

Model 

Year

Compliance 

Factor

2500 

RPM/Idle

Passenger Car

Passenger Truck

Light Commercial 

Truck

1990 Annual Gasoline 

Vehicles

HC Running Exh

HC Start Exh

CO Running Exh

CO Start Exh

1981 1988

93.12

87.53

81.95

Unloaded 

Idle

Passenger Car

Passenger Truck

Light Commercial 

Truck

1997-2050 Annual Gasoline 

Vehicles

HC Running Exh

HC Start Exh

CO Running Exh

CO Start Exh

1975 1980

93.12

87.53

81.95

2500 

RPM/Idle

Passenger Car

Passenger Truck

Light Commercial 

Truck

1997-2050 Annual Gasoline 

Vehicles

HC Running Exh

HC Start Exh

CO Running Exh

CO Start Exh

1981 1995

93.12

87.53

81.95

Exhaust 

OBD

Passenger Car

Passenger Truck

Light Commercial 

Truck

2004-2050 Annual Gasoline 

Vehicles

HC Running Exh

HC Start Exh

CO Running Exh

CO Start Exh

NOx Running Exh

NOx Start Exh

1996 2003-2049 

(Cal Yr - 1)

93.12

87.53

81.95

Evp Cap

Passenger Car

Passenger Truck

Light Commercial 

Truck

1997-2003 Annual Gasoline 

Vehicles

HC Evap Fuel Vent

HC Evap Fuel Leak 1975 1996-2002(Cal Yr - 1)

93.12

87.53

81.95

Evp Cap

Passenger Car

Passenger Truck

Light Commercial 

Truck

2004-2050 Annual Gasoline 

Vehicles

HC Evap Fuel Vent

HC Evap Fuel Leak 1975 1995

93.12

87.53

81.95

Evp Cap & 

OBD

Passenger Car

Passenger Truck

Light Commercial 

Truck

2004-2050 Annual Gasoline 

Vehicles

HC Evap Fuel Vent

HC Evap Fuel Leak 1996 2003-2049 (Cal Yr - 1)

93.12

87.53

81.95

MOVES uses the compliance factor input to account for I/M program compliance rates, waiver rates, and 

adjustments needed to account for the fraction of vehicles within each source type covered by the I/M 

program. Table A.3 from EPA’s MOVES technical guidance was used to develop the compliance rates.
Page 29

Fuel Parameters 

The default MOVES fuel formulations were discussed with DEP and a revised fuel formulation was 

developed for Allegheny County. Exhibit 8 provides a summary of key fuel characteristics for Allegheny 

County for all months. During the summer low-RVP season, ethanol gasoline is not assumed to be sold 

in the county. For the remaining months, fuel with a 6.78% ethanol is sold throughout the county. For 

this inventory, only the January (month =1) parameters are used for the analyses. 

Exhibit 8: Fuel Parameters

Month MOVE Fuel 

Subtype

Market 

Share RVP Sulfur Level

Ethanol 

Volume

MTBE / 

ETBE / 

TAME 

Volume

1,2,12 Gasohol (E8) 100% 14.500 25.707 6.78 0

3,4,10,11 Gasohol (E8) 100% 11.929 24.366 6.78 0

5,6,7,8,9 Conventional 

Gasoline 100% 7.800 22.579 0 0

Weather Data 

Historical weather information has been purchased by PennDOT from WeatherBank, Inc.

(http://www.weatherbank.com/). WeatherBank compiles detailed temperature data from airports and 

other sources. Allegheny County hourly temperature (in degrees Fahrenheit) and relative humidity (in 

percent – 0 to 100 scale) inputs from WeatherBank were used for input to the MOVES model. The data 

for January represents the 10-year average of hourly temperatures and humidity. The data was originally 

prepared for input to MOBILE6.2 as daily average minimum and maximum temperatures and absolute 

humidity. The data was converted to the hourly MOVES formats using EPA’s EXCEL temperature 

convertor obtained from EPA’s website (http://www.epa.gov/otaq/models/moves/tools.htm). Exhibit 9

summarizes the data used for the MOVES January runs.

Exhibit 9: January Temperature and Humidity Parameters

Hour 1 2 3 4 5 6 7 8 9 10 11 12

Temperature 29.24 28.82 28.50 28.26 28.08 27.88 27.70 27.85 28.74 30.16 31.61 32.85

Humidity 75.08 76.36 77.39 78.14 78.72 79.39 79.97 79.49 76.64 72.32 68.19 64.86

Hour 13 14 15 16 17 18 19 20 21 22 23 24

Temperature 33.94 34.53 34.74 34.80 34.65 34.24 33.53 32.61 31.69 30.90 30.33 29.77

Humidity 62.07 60.62 60.12 59.98 60.33 61.34 63.11 65.48 67.94 70.18 71.80 73.46
Page 30

Vehicle Technology 

The federal vehicle emissions control and fuel programs are incorporated into the MOVES software. The 

programs include:

The Federal Motor Vehicle Control Program (FMVCP) including the National Low Emission 

Vehicle Program (NLEV) and federal Tier II / Low Sulfur Fuel Program;

Emissions standards for medium and heavy duty vehicles in 2002, 2004, 2007, and 2011;

Stage II and Onboard Refueling Vapor Recovery (ORVR).

Note: Pennsylvania considers emissions from refueling operations an area source category. While MOVES 

can be used to calculate emissions factors for that source category, refueling emissions are not included in 

highway vehicle emissions estimations.

Several state-specific vehicle technology programs are also reflected in the MOVES modeling for 

Allegheny County.

Within the Ozone Transportation Commission (OTC) area, which includes Pennsylvania, the NLEV 

program began in 1999. The default emissions database that is included with MOVES includes the 

effects of the nationwide NLEV standards beginning with the 2001 model year.

The Pennsylvania Clean Vehicles (PCV) Program, (PaCode, Title 25, Chapter 126) adopted in 1998, 

incorporated the California Low Emission Vehicle Program (CA LEV II) by reference although it allowed 

automakers to comply with the NLEV program as an alternative to this Pennsylvania program until MY 

2006. Beginning with MY 2008, “new” passenger cars and light-duty trucks with a gross vehicle weight 

rating (GVWR) of 8,500 pounds or less that are sold or leased and titled in Pennsylvania must be certified 

by the California Air Resources Board (CARB) or be certified for sale in all 50 states. The impacts of 

this program are modeled for all analysis years beyond 2008. MOVES does not include the impacts of 

the PCV in the default emissions database.

To address the OTC NLEV early phase-in and the effects of the PCV program within MOVES, two 

separate emission databases reflecting each of the programs have been provided by EPA and documented 

in the report Instructions for Using LEV and NLEV Inputs to MOVES, EPA-420-B-10-003, January 2010. 

The early NLEV database includes 1999 and 2000 model year rates. This file was used directly as input 

to the MOVES software. For the PCV program, the MOVES CALEV file that includes updated rates 

from 1994-2050 was modified to only use the rates for model years 2008 beyond as consistent with the 

PCV program start date.

 
Page 31

EMISSION TABLES

Exhibit 10 and Exhibit 11 provide the MOVES CO emissions results for Allegheny County. The 

MOVES model estimates emissions for the 5 roadway types used by the model. The off-roadway 

category includes the start emissions that cannot be directly attributable to a roadway link.

Exhibit 10: 2013 Allegheny County CO Emissions

(January Weekday)

MOVES Road Type Emission 

Components VMT

Average 

Speed

(mph)

CO 

Emissions 

(kg/day)

CO 

Emissions 

(tons/day)

Rural Restricted Access 

(Freeway)

Running 

Exhaust

0 0.0 0 0.00

Rural Unrestricted Access 

(Non-Freeway) 376,491 48.6 1,461 1.61

Urban Restricted Access 

(Freeway) 8,518,382 56.8 43,218 47.64

Urban Unrestricted Access 

(Non-Freeway) 16,832,658 28.0 70,779 78.02

Off-Roadway

Start Exhaust 

/ Extended 

Idle

----- ----- 242,454 267.26

TOTAL 25,727,530 33.9 357,912 394.53

Exhibit 11: 2022 Allegheny County CO Emissions

(January Weekday)

MOVES Road Type Emission 

Components VMT

Average 

Speed

(mph)

CO 

Emissions 

(kg/day)

CO 

Emissions 

(tons/day)

Rural Restricted Access 

(Freeway)

Running 

Exhaust

0 0.0 0 0.00

Rural Unrestricted Access 

(Non-Freeway) 370,158 48.7 1,043 1.15

Urban Restricted Access 

(Freeway) 10,442,966 50.1 41,204 45.42

Urban Unrestricted Access 

(Non-Freeway) 17,564,607 27.4 51,474 56.74

Off-Roadway

Start Exhaust 

/ Extended 

Idle

----- ----- 211,338 232.96

TOTAL 28,377,731 33.1 305,059 336.27
Page 32

MOVES INPUT/OUTPUT SPECIFICATION FILES

MOVES Importer XML Script File – 2013

(2022 file same except for year)

- <moves>

- <importer mode="county">

- <filters>

- <geographicselections>

 <geographicselection type="COUNTY" key="42003" description="PENNSYLVANIA - ALLEGHENY County" /> 

 </geographicselections>

- <timespan>

 <year key="2013" /> 

 <month id="1" /> 

 <day id="2" /> 

 <day id="5" /> 

 <beginhour id="1" /> 

 <endhour id="24" /> 

 <aggregateBy key="Hour" /> 

 </timespan>

- <onroadvehicleselections>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="62" sourcetypename="Combination Long-haul Truck" /> 

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="61" sourcetypename="Combination Short-haul Truck" /> 

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="41" sourcetypename="Intercity Bus" /> 

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="32" sourcetypename="Light Commercial Truck" /> 

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="54" sourcetypename="Motor Home" /> 

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="11" sourcetypename="Motorcycle" /> 

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="21" sourcetypename="Passenger Car" /> 

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="31" sourcetypename="Passenger Truck" /> 

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="51" sourcetypename="Refuse Truck" /> 

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="43" sourcetypename="School Bus" /> 

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="53" sourcetypename="Single Unit Long-haul Truck" /> 

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="52" sourcetypename="Single Unit Short-haul Truck" /> 

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="42" sourcetypename="Transit Bus" /> 

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="62" sourcetypename="Combination Long-haul Truck" /> 

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="61" sourcetypename="Combination Short-haul Truck" /> 

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="41" sourcetypename="Intercity Bus" /> 

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="32" sourcetypename="Light Commercial Truck" />

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="54" sourcetypename="Motor Home" /> 

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="11" sourcetypename="Motorcycle" /> 

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="21" sourcetypename="Passenger Car" /> 

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="31" sourcetypename="Passenger Truck" /> 

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="51" sourcetypename="Refuse Truck" /> 

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="43" sourcetypename="School Bus" /> 

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="53" sourcetypename="Single Unit Long-haul Truck" /> 

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="52" sourcetypename="Single Unit Short-haul Truck" /> 

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="42" sourcetypename="Transit Bus" /> 

 </onroadvehicleselections>

 <offroadvehicleselections /> 

 <offroadvehiclesccs /> 

- <roadtypes>

 <roadtype roadtypeid="1" roadtypename="Off-Network" /> 

 <roadtype roadtypeid="2" roadtypename="Rural Restricted Access" /> 

 <roadtype roadtypeid="3" roadtypename="Rural Unrestricted Access" /> 

 <roadtype roadtypeid="4" roadtypename="Urban Restricted Access" /> 

 <roadtype roadtypeid="5" roadtypename="Urban Unrestricted Access" /> 

 </roadtypes>

 </filters>

 <databaseselection servername="localhost" databasename="ALLE_2013_CO_JAN_mi" /> 

- <agedistribution>

- <description>

- <![CDATA[ 

 ]]> 

 </description>

- <parts>

- <sourceTypeAgeDistribution>
Page 33

 <filename>C:\PAMOVES\InputData\AgeDistribution\2013\42003_2013_SourceTypeAgeDistribution.xls</filename> 

 </sourceTypeAgeDistribution>

 </parts>

 </agedistribution>

- <avgspeeddistribution>

- <description>

- <![CDATA[ 

 ]]> 

 </description>

- <parts>

- <avgSpeedDistribution>

 <filename>C:\PAMOVES\out\DAY\ALLE\MOVESdata\avgSpeedDistribution.csv</filename> 

 </avgSpeedDistribution>

 </parts>

 </avgspeeddistribution>

- <imcoverage>

- <description>

- <![CDATA[ 

 ]]> 

 </description>

- <parts>

- <imcoverage>

 <filename>C:\PAMOVES\InputData\IM\42003_IMCoverage.csv</filename> 

 </imcoverage>

 </parts>

 </imcoverage>

- <fuelformulation>

- <description>

- <![CDATA[ 

 ]]> 

 </description>

- <parts>

- <fuelformulation>

 <filename>C:\PAMOVES\InputData\Fuel\42003_fuelformulation.csv</filename> 

 </fuelformulation>

 </parts>

 </fuelformulation>

- <fuelsupply>

- <description>

- <![CDATA[ 

 ]]> 

 </description>

- <parts>

- <fuelSupply>

 <filename>C:\PAMOVES\InputData\Fuel\42003_fuelsupply.csv</filename> 

 </fuelSupply>

 </parts>

 </fuelsupply>

- <zonemonthhour>

- <description>

- <![CDATA[ 

 ]]> 

 </description>

- <parts>

- <zoneMonthHour>

 <filename>C:\PAMOVES\InputData\Met\2013\42003_2013_met.xls</filename> 

 </zoneMonthHour>

 </parts>

 </zonemonthhour>

- <roadtypedistribution>

- <description>

- <![CDATA[ 

 ]]> 

 </description>

- <parts>

- <roadTypeDistribution>

 <filename>C:\PAMOVES\out\DAY\ALLE\MOVESdata\roadTypeDistribution.csv</filename> 

 </roadTypeDistribution>

 </parts>

 </roadtypedistribution>
Page 34

- <sourcetypepopulation>

- <description>

- <![CDATA[ 

 ]]> 

 </description>

- <parts>

- <sourceTypeYear>

 <filename>C:\PAMOVES\out\DAY\ALLE\MOVESdata\SourceTypePopulation.csv</filename> 

 </sourceTypeYear>

 </parts>

 </sourcetypepopulation>

- <rampfraction>

- <description>

- <![CDATA[ 

 ]]> 

 </description>

- <parts>

- <roadType>

 <filename>C:\PAMOVES\InputData\VMT\rampfraction_defaults.csv</filename> 

 </roadType>

 </parts>

 </rampfraction>

- <vehicletypevmt>

- <description>

- <![CDATA[ 

 ]]> 

 </description>

- <parts>

- <hpmsVTypeYear>

 <filename>C:\PAMOVES\out\DAY\ALLE\MOVESdata\hpmsVTypeYear.csv</filename> 

 </hpmsVTypeYear>

- <monthvmtfraction>

 <filename>C:\PAMOVES\out\DAY\ALLE\MOVESdata\monthvmtfraction.csv</filename> 

 </monthvmtfraction>

- <dayvmtfraction>

 <filename>C:\PAMOVES\out\DAY\ALLE\MOVESdata\dayvmtfraction.csv</filename> 

 </dayvmtfraction>

- <hourvmtfraction>

 <filename>C:\PAMOVES\out\DAY\ALLE\MOVESdata\hourvmtfraction.csv</filename> 

 </hourvmtfraction>

 </parts>

 </vehicletypevmt>

 </importer>

 </moves>
Page 35

MOVES Run MRS Script File – 2013

(2022 file same except for year)

<runspec>

 <description><![CDATA[MOVES2009 RunSpec Created by CENTRAL4 Scenario: ALLE 2013 CO JAN Emission Inventory with user's 

data]]></description>

 <modelscale value="INV"/>

 <modeldomain value="SINGLE"/>

 <geographicselections>

 <geographicselection type="COUNTY" key="42003" description="PENNSYLVANIA - ALLEGHENY County"/>

 </geographicselections>

 <timespan>

 <year key="2013"/>

 <month id="1"/>

 <day id="5"/>

 <beginhour id="1"/>

 <endhour id="24"/>

 <aggregateBy key="Hour"/>

 </timespan>

 <onroadvehicleselections>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="62" sourcetypename="Combination Long-haul 

Truck"/>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="61" sourcetypename="Combination Short-haul 

Truck"/>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="41" sourcetypename="Intercity Bus"/>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="32" sourcetypename="Light Commercial Truck"/>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="54" sourcetypename="Motor Home"/>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="11" sourcetypename="Motorcycle"/>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="21" sourcetypename="Passenger Car"/>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="31" sourcetypename="Passenger Truck"/>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="51" sourcetypename="Refuse Truck"/>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="43" sourcetypename="School Bus"/>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="53" sourcetypename="Single Unit Long-haul Truck"/>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="52" sourcetypename="Single Unit Short-haul Truck"/>

 <onroadvehicleselection fueltypeid="2" fueltypedesc="Diesel Fuel" sourcetypeid="42" sourcetypename="Transit Bus"/>

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="62" sourcetypename="Combination Long-haul Truck"/>

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="61" sourcetypename="Combination Short-haul Truck"/>

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="41" sourcetypename="Intercity Bus"/>

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="32" sourcetypename="Light Commercial Truck"/>

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="54" sourcetypename="Motor Home"/>

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="11" sourcetypename="Motorcycle"/>

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="21" sourcetypename="Passenger Car"/>

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="31" sourcetypename="Passenger Truck"/>

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="51" sourcetypename="Refuse Truck"/>

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="43" sourcetypename="School Bus"/>

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="53" sourcetypename="Single Unit Long-haul Truck"/>

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="52" sourcetypename="Single Unit Short-haul Truck"/>

 <onroadvehicleselection fueltypeid="1" fueltypedesc="Gasoline" sourcetypeid="42" sourcetypename="Transit Bus"/>

 </onroadvehicleselections>

 <offroadvehicleselections>

 </offroadvehicleselections>

 <offroadvehiclesccs>

 </offroadvehiclesccs>

 <roadtypes>

 <roadtype roadtypeid="1" roadtypename="Off-Network"/>

 <roadtype roadtypeid="2" roadtypename="Rural Restricted Access"/>

 <roadtype roadtypeid="3" roadtypename="Rural Unrestricted Access"/>

 <roadtype roadtypeid="4" roadtypename="Urban Restricted Access"/>

 <roadtype roadtypeid="5" roadtypename="Urban Unrestricted Access"/>

 </roadtypes>

 <pollutantprocessassociations>

 <pollutantprocessassociation pollutantkey="2" pollutantname="Carbon Monoxide (CO)" processkey="1" processname="Running 

Exhaust"/>

 <pollutantprocessassociation pollutantkey="2" pollutantname="Carbon Monoxide (CO)" processkey="2" processname="Start 

Exhaust"/>

 <pollutantprocessassociation pollutantkey="2" pollutantname="Carbon Monoxide (CO)" processkey="15" processname="Crankcase 

Running Exhaust"/>

 <pollutantprocessassociation pollutantkey="2" pollutantname="Carbon Monoxide (CO)" processkey="16" processname="Crankcase 

Start Exhaust"/>
Page 36

 <pollutantprocessassociation pollutantkey="2" pollutantname="Carbon Monoxide (CO)" processkey="17" processname="Crankcase 

Extended Idle Exhaust"/>

 <pollutantprocessassociation pollutantkey="2" pollutantname="Carbon Monoxide (CO)" processkey="90" processname="Extended 

Idle Exhaust"/>

 </pollutantprocessassociations>

 <databaseselections>

 <databaseselection servername="localhost" databasename="early_NLEV" description=""/>

 <databaseselection servername="localhost" databasename="calevii08" description=""/>

 </databaseselections>

 <internalcontrolstrategies>

 </internalcontrolstrategies>

 <inputdatabase servername="" databasename="" description=""/>

 <uncertaintyparameters uncertaintymodeenabled="false" numberofrunspersimulation="0" numberofsimulations="0"/>

 <geographicoutputdetail description="COUNTY"/>

 <outputemissionsbreakdownselection>

 <modelyear selected="false"/>

 <fueltype selected="false"/>

 <emissionprocess selected="true"/>

 <onroadoffroad selected="true"/>

 <roadtype selected="true"/>

 <sourceusetype selected="true"/>

 <movesvehicletype selected="false"/>

 <onroadscc selected="false"/>

 <offroadscc selected="false"/>

 <estimateuncertainty selected="false" numberOfIterations="2" keepSampledData="false" keepIterations="false"/>

 <segment selected="false"/>

 <hpclass selected="false"/>

 </outputemissionsbreakdownselection>

 <outputdatabase servername="localhost" databasename="ALLE_2013_CO_JAN_mo" description=""/>

 <outputtimestep value="Hour"/>

 <outputvmtdata value="true"/>

 <scaleinputdatabase servername="localhost" databasename="ALLE_2013_CO_JAN_mi" description=""/>

 <pmsize value="0"/>

 <outputfactors>

 <timefactors selected="true" units="Hours"/>

 <distancefactors selected="false" units="Miles"/>

 <massfactors selected="false" units="Grams" energyunits="Million BTU"/>

 </outputfactors>

 <savedata>

 </savedata>

 <donotexecute>

 </donotexecute>

 <generatordatabase shouldsave="false" servername="" databasename="" description=""/>

 <donotperformfinalaggregation selected="false"/>

</runspec>
Page 37

MOVES Output Summary of Tables Used For Run 

(2013 and 2022 files are same except for year)

MOVESRunID databaseName tableName dataFileModificationDate tableUseSequence

1 ALLE_2022_CO_JAN_mi AvgSpeedDistribution 6/23/2010 1

1 ALLE_2022_CO_JAN_mi County 6/23/2010 2

1 ALLE_2022_CO_JAN_mi DayVMTFraction 6/23/2010 3

1 ALLE_2022_CO_JAN_mi FuelFormulation 6/23/2010 4

1 ALLE_2022_CO_JAN_mi FuelSupply 6/23/2010 5

1 ALLE_2022_CO_JAN_mi HourVMTFraction 6/23/2010 6

1 ALLE_2022_CO_JAN_mi HPMSVtypeYear 6/23/2010 7

1 ALLE_2022_CO_JAN_mi IMCoverage 6/23/2010 8

1 ALLE_2022_CO_JAN_mi MonthVMTFraction 6/23/2010 9

1 ALLE_2022_CO_JAN_mi RoadType 6/23/2010 10

1 ALLE_2022_CO_JAN_mi RoadTypeDistribution 6/23/2010 11

1 ALLE_2022_CO_JAN_mi SourceTypeAgeDistribution 6/23/2010 12

1 ALLE_2022_CO_JAN_mi SourceTypeYear 6/23/2010 13

1 ALLE_2022_CO_JAN_mi State 6/23/2010 14

1 ALLE_2022_CO_JAN_mi Year 6/23/2010 15

1 ALLE_2022_CO_JAN_mi Zone 6/23/2010 16

1 ALLE_2022_CO_JAN_mi ZoneMonthHour 6/23/2010 17

1 ALLE_2022_CO_JAN_mi ZoneRoadType 6/23/2010 18

1 calevii08 EmissionRateByAge 6/22/2010 19

1 early_NLEV EmissionRateByAge 1/7/2010 20

1 movesdb20100515 AgeCategory 4/21/2009 21

1 movesdb20100515 AgeGroup 4/21/2009 22

1 movesdb20100515 AvgSpeedBin 4/21/2009 23

1 movesdb20100515 BaseFuel 8/12/2009 24

1 movesdb20100515 ComplexModelParameterName 10/28/2009 25

1 movesdb20100515 ComplexModelParameters 8/12/2009 26

1 movesdb20100515 CountyYear 4/21/2009 27

1 movesdb20100515 CrankcaseEmissionRatio 5/18/2010 28

1 movesdb20100515 DataSource 5/18/2010 29

1 movesdb20100515 DayOfAnyWeek 4/21/2009 30

1 movesdb20100515 DriveSchedule 12/16/2009 31

1 movesdb20100515 DriveScheduleAssoc 12/16/2009 32

1 movesdb20100515 DriveScheduleSecond 12/16/2009 33

1 movesdb20100515 EmissionProcess 12/15/2009 34

1 movesdb20100515 EmissionRate 11/25/2009 35

1 movesdb20100515 EmissionRateByAge 5/18/2010 36

1 movesdb20100515 EngineSize 4/21/2009 37

1 movesdb20100515 EngineTech 4/21/2009 38

1 movesdb20100515 ETOHBin 5/18/2010 39

1 movesdb20100515 FuelEngFraction 12/15/2009 40

1 movesdb20100515 FuelEngTechAssoc 12/8/2009 41

1 movesdb20100515 FuelFormulation 5/18/2010 42

1 movesdb20100515 FuelModelName 8/12/2009 43

1 movesdb20100515 FuelModelWtFactor 8/12/2009 44

1 movesdb20100515 FuelModelYearGroup 4/21/2009 45

1 movesdb20100515 FuelParameterName 8/12/2009 46

1 movesdb20100515 FuelSubtype 5/18/2010 47

1 movesdb20100515 FuelSupply 11/25/2009 48

1 movesdb20100515 FuelSupplyYear 4/21/2009 49

1 movesdb20100515 FuelType 12/15/2009 50

1 movesdb20100515 FullACAdjustment 10/28/2009 51
Page 38

1 movesdb20100515 generalFuelRatioExpression 5/18/2010 52 1 movesdb20100515 HourDay 4/21/2009 53 1 movesdb20100515 HourOfAnyDay 4/21/2009 54 1 movesdb20100515 HPMSVtype 4/21/2009 55 1 movesdb20100515 HPMSVtypeYear 10/28/2009 56 1 movesdb20100515 IMFactor 10/30/2009 57 1 movesdb20100515 IMInspectFreq 9/28/2009 58 1 movesdb20100515 IMModelYearGroup 4/21/2009 59 1 movesdb20100515 IMTestStandards 12/8/2009 60 1 movesdb20100515 Link 10/28/2009 61 1 movesdb20100515 M6SulfurCoeff 8/12/2009 62 1 movesdb20100515 MeanFuelParameters 10/28/2009 63 1 movesdb20100515 ModelYear 4/21/2009 64 1 movesdb20100515 ModelYearGroup 8/12/2009 65 1 movesdb20100515 MonthGroupHour 4/21/2009 66 1 movesdb20100515 MonthGroupOfAnyYear 4/21/2009 67 1 movesdb20100515 MonthofAnyYear 4/21/2009 68 1 movesdb20100515 OperatingMode 4/21/2009 69 1 movesdb20100515 OpModePolProcAssoc 5/18/2010 70 1 movesdb20100515 OxyThreshName 8/12/2009 71 1 movesdb20100515 PollutantDisplayGroup 10/28/2009 72 1 movesdb20100515 Pollutant 10/28/2009 73 1 movesdb20100515 PollutantProcessAssoc 5/18/2010 74 1 movesdb20100515 PollutantProcessModelYear 5/18/2010 75 1 movesdb20100515 RefuelingFactors 11/25/2009 76 1 movesdb20100515 RegulatoryClass 4/21/2009 77 1 movesdb20100515 RegClassFraction 11/5/2009 78 1 movesdb20100515 RetrofitInputAssociations 4/21/2009 79 1 movesdb20100515 RoadOpmodeDistribution 4/21/2009 80 1 movesdb20100515 RoadType 4/21/2009 81 1 movesdb20100515 SampleVehicleDay 10/30/2009 82 1 movesdb20100515 SampleVehicleTrip 10/30/2009 83 1 movesdb20100515 SampleVehiclePopulation 11/5/2009 84 1 movesdb20100515 SCC 4/21/2009 85 1 movesdb20100515 SCCProcess 4/21/2009 86 1 movesdb20100515 SCCRoadType 4/21/2009 87 1 movesdb20100515 SCCRoadTypeDistribution 4/21/2009 88 1 movesdb20100515 SCCVType 4/21/2009 89 1 movesdb20100515 SCCVTypeDistribution 11/5/2009 90 1 movesdb20100515 SizeWeightFraction 11/5/2009 91 1 movesdb20100515 SourceTypeAge 11/5/2009 92 1 movesdb20100515 SourceTypeAgeDistribution 10/28/2009 93 1 movesdb20100515 SourceTypeHour 4/21/2009 94 1 movesdb20100515 SourceTypeModelYear 4/21/2009 95 1 movesdb20100515 SourceTypeModelYearGroup 5/18/2010 96 1 movesdb20100515 SourceTypePolProcess 11/5/2009 97 1 movesdb20100515 SourceTypeYear 10/28/2009 98 1 movesdb20100515 SourceUseType 10/30/2009 99 1 movesdb20100515 SulfurBase 8/12/2009 100 1 movesdb20100515 sulfurCapAmount 8/12/2009 101 1 movesdb20100515 SulfurModelCoeff 8/12/2009 102 1 movesdb20100515 SulfurModelName 8/12/2009 103 1 movesdb20100515 TankTemperatureGroup 5/18/2010 104 1 movesdb20100515 TankTemperatureRise 5/18/2010 105 1 movesdb20100515 TankVaporGenCoeffs 4/21/2009 106 1 movesdb20100515 TemperatureAdjustment 11/25/2009 107
Page 39

1 movesdb20100515 StartTempAdjustment 12/2/2009 108

1 movesdb20100515 WeightClass 4/21/2009 109

1 movesdb20100515 Year 11/25/2009 110
Page 40

RESOURCES 

Consolidated Emissions Reporting, Federal Register, June 10, 2002

2008 Pennsylvania Traffic Data, PennDOT Bureau of Planning and Research, 2008. 

User’s Guide to MOBILE6.1 and MOBILE6.2, Mobile Source Emission Factor Model, EPA420-R-02-

028, dated August 2003.

Technical Guidance on the Use of MOBILE6 for Emission Inventory Preparation, US EPA Office of 

Transportation and Air Quality, August 2004.

Policy Guidance on the Use of MOBILE6 for Emission Inventory Preparation, US EPA Office of Air and 

Radiation, January 18, 2002.

Technical Guidance on the Use of MOBILE6.2 for Emission Inventory Preparation, US EPA Office of 

Air and Radiation, and Office of Transportation and Air Quality, August 2004.

Statistical Evaluation of Projected Traffic Growth, Traffic Growth Forecasting System: Final Report, 

Michael Baker Jr., Inc., March 14, 2005.

Motor Vehicle Emission Simulator (MOVES) 2010 User Guide, EPA-420-B-09-041, December 2009.

Policy Guidance on the Use of MOVES2010 for State Implementation Plan Development, Transportation 

Conformity, and Other Purposes, EPA-420-B-09-046, December 2009

Technical Guidance on the Use of MOVES2010 for Emission Inventory Preparation in State 

Implementation Plans and Transportation Conformity, EPA-420-B-10-023, April 2010

Instructions for Using LEV and NLEV Inputs to MOVES, EPA-420-B-10-003, January 2010
Page 41

2. Technical Support Document

Summary of Change

Allegheny County Health Department (ACHD) submitted a State Implementation Plan (SIP)

revision for CO under the limited maintenance plan option. In that analysis, each redesignation 

criterion in Section 107(d)(3)(E) of the Clean Air Act (CAA or the Act) is listed, along with a 

short description of the guidance provided by EPA in relation to that criterion, and the 

justification that supports the request for redesignation to attainment. Significantly, since the 

area is “not classified,” and has a design value below 7.65 ppm, the County used EPA’s 

“Limited Maintenance Plan Option” in addressing Section 107(d)(3)(E)(iv). Additionally, 

because the area is “not classified,” the SIP submittal requirements of the CAA, Section 187, do 

not apply. The CBD was designated CO attainment status with an effective date of January 13, 

2003.

ACHD is submitting a SIP revision to the EPA to revise the Carbon Monoxide Limited 

Maintenance Plan in accordance with Section 107(d) of the CAA to ensure maintenance of the 

NAAQS in the CBD of Allegheny County for a second ten-year period through year 2022. This 

ten-year plan maintains existing controls and contingency provisions, and succeeds the previous 

plan approved by the EPA in 2003. CO levels are expected to remain well below the NAAQS 

for the ten-year period ending 2022.

The revision to the Carbon Monoxide Limited Maintenance Plan constitutes a change to the 

Allegheny County portion of the Pennsylvania State Implementation Plan.
Page 42

3. Documentation of Public Hearing and Certifications

Notice of Public Hearing

Transmittals of hearing notice to EPA & PA DEP

Proof of publication of notice of hearing

Certification of hearing

Summary of Comments and responses

Certification of approval and adoption
Page 43

NOTICE OF PUBLIC HEARING

FOR PROPOSED REVISION TO

ALLEGHENY COUNTY’S PORTION OF THE

PENNSYLVANIA STATE IMPLEMENTATION PLAN

FOR CARBON MONOXIDE

The Allegheny County Board of Health will hold a public hearing on Friday, October 22, 2010, 

at 10:00 AM, Building #7 First Floor Conference Room, Clack Health Center, 301 39th Street, 

Pittsburgh, PA 15201 to take testimony on the following proposed modifications to Allegheny 

County’s portion of the Pennsylvania State Implementation Plan:

Revision of the Carbon Monoxide Limited Maintenance Plan.

The proposed changes to the Carbon Monoxide Limited Maintenance Plan will be 

incorporated as a revision to Allegheny County’s portion of the Pennsylvania State 

Implementation Plan.

Copies of the proposed revision may be examined beginning Wednesday, September 22, 2010, at 

the Allegheny County Law Library, Room 921 City-County Building, Grant Street, Pittsburgh, 

PA 15219, from 8:30 AM to 5:00 PM; at the Allegheny County Health Department Library, 

Building 7, Clack Health Center, from 8:30 AM until 3:30 PM Monday thru Friday; on the 

Allegheny County Health Department web site: www.achd.net; or by calling 412-578-8120 to 

request a mailed printed copy.

Oral testimony must be pre-scheduled by calling 412-578-8008 no less than 24 hours in advance 

of the public hearing. Speakers will be limited to five minutes and should bring a written copy 

of their comments. 

The Board will accept written testimony beginning Wednesday, September 22, 2010, and 

concluding Friday, October 22, 2010, by mail to: 

Board of Health

3333 Forbes Avenue

Pittsburgh, PA 15213

By email to BOH@achd.net

By Fax to 412-578-8325
Page 44
Page 45
Page 46
Page 47
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Page 49

Comment and Response Document for the Proposed SIP Revision 69

SIP Amendment for the Carbon Monoxide Limited Maintenance Plan

October 22, 2010 Public Hearing

1. Comment: ACHD should include the supporting documentation for the MOVES 

modeling with the CO Limited Maintenance Plan. 

Commenter: Maria Pino

Response: ACHD will add the modeling documentation as an Appendix for the 

MOVES model provided by Michael Baker, Jr., Incorporated.
Page 50