Transportation Conformity:
A Basic Guide for State and Local Officials

Revised June 19, 2000
This guide was originally published in 1997. This updated version reflects the implementation of the Transportation Equity Act for the 21st Century, as well as the March 2, 1999 Decision by the U.S. Court of Appeals for the District of Columbia Circuit which affected certain conformity provisions.

Table of Contents

Executive Summary

Part One: The Basics of Transportation Conformity

• Background
  
• What Is Transportation Conformity?
  
• What Actions Are Subject to Transportation Conformity?
  
• Who Makes Conformity Determinations?
  
• What Is the Frequency of Conformity Determinations?
  
• The Key Components of a Conformity Determination
  
  • CAA Requirements
    
  • Transportation Planning Requirements
    
• Consequences of a Failure to Make a Conformity Determination: Conformity Lapse

Part Two: Roles and Responsibilities in the Conformity Determination

• Interagency Consultation
• Public Participation: Access for Stakeholders and Citizens
• Conclusion

Appendices

• Appendix A: Options to Reduce Emissions from Motor Vehicles
• Appendix B: Health Impacts of Pollutants
• Appendix C: Resource Agencies Contact List

Glossary