Air Quality Conformity Determination
Pittsburgh Transportation Management Area
for the
8-Hour Ozone Standard
PM2.5 Air Quality Standards

Companion Document to the 2009-2012 Transportation Improvement Program and the 2035 Transportation and Development Plan for Southwestern Pennsylvania

This companion report to the 2009-2012 TIP documents compliance of the 2009-2012 TIP and the 2035 Transportation and Development Plan for Southwestern Pennsylvania (2035 Plan) with requirements of the federal Clean Air Act Amendments of 1990 (CAAA 90). This report documents the process used by SPC in the Spring of 2008 for making the transportation-related conformity determination for the 2009-2012 TIP and for the 2035 Plan under the 8-hour ozone standard, the PM2.5 air quality standards, and the carbon monoxide standards. The conformity determination is required by the federal Clean Air Act. SPC’s conformity finding is based upon criteria and procedures described in EPA's Transportation Conformity Rule (40 CFR Part 93) and satisfies all applicable conformity requirements for the 8-hour ozone standard and the PM2.5 air quality standards.

The Air Quality Conformity Assessment is provided in Adobe Acrobat PDF format. In order to view it, you must have Adobe Acrobat Reader installed. If you don’t have Acrobat Reader, it’s available as a free download from Adobe.

Front Cover

Inside Front Cover

Table of Contents

Section I. Introduction

Section II. Regional Implications of the 1990 Clean Air Act Amendments and Overview of Conformity Criteria

Section III. Transportation Networks Developed for Conformity Assessment

Section IV. Travel Estimation Process

Section V. Development of Emission Factors

Section VI. Transportation Model Application and Results

Section VII. Conformity Determinations

Section VIII. Public Review and Comment

Appendices

Appendix A. Conformity Determination: Johnstown PM2.5 Nonattainment Area

Appendix B. Conformity Determination: Clearfield-Indiana 8-Hour Ozone Nonattainment Area

Appendix C. Identification of “Exempt” and “Non-Exempt” Projects Included in the 2007-2010 TIP

Appendix D. Sample MOBILE6 Input Parameters

Appendix E. County and Facility Type Summaries: VMT, Speed, Emissions

Appendix F. TDM Model Setup and Results

Appendix G. Common Acronyms

For questions about the DRAFT Air Quality Report, contact Chuck Imbrogno at (412) 391-5590 x319 or e-mail imbrogno@spcregion.org.

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