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Regulations
Transportation
Conformity
- Main Transportation Conformity Page
- General Information
- Policy Guidance
- Training Materials
- Regulations
- Adequacy Review of SIP Submissions
- Regional Contacts
NOTE: You will need Adobe Acrobat Reader, available as a free download, to view some of the files on this page. See EPA's PDF page to learn more about PDF, and for a link to the free Acrobat Reader.
This page provides access to all transportation conformity regulations, including final rules and rulemakings currently in progress. It also provides access to guidance documents that have been issued to facilitate implementation of the conformity program.
Current Laws and Regulations
- Clean Air Act - Conformity Section (PDF) (8 pp, 107K) This document includes Clean Air Act Section 176(c) as amended by the 2005 transportation act known as “SAFETEA-LU". EPA is providing this document for informational purposes only.
- Transportation Conformity Regulations (PDF) (47 pp, 398K, EPA420-B-08-001) This document contains complete transportation conformity regulations and reflects all transportation conformity rulemakings promulgated by EPA as of Jan. 9, 2008, including the SAFETEA-LU final rule.
SAFETEA-LU Rulemaking
Transportation Conformity Rule Amendments to Implement Provisions Contained in the Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (published January 24, 2008)
EPA has updated the transportation conformity rule to make it consistent with the Clean Air Act as amended by SAFETEA-LU.
- Final Rule | PDF version (23 pp, 200K)
- Fact Sheet | PDF Version (2 pp, 101K, EPA-420-F-08-002, January 2008)
- Joint EPA-DOT Interim Guidance for Implementing SAFETEA-LU's Conformity Provisions (February 2006) While the majority of this guidance is superceded by the final rule, Section 5 (TCMs) and Section 7 (conformity SIPs) still apply. EPA will update this guidance shortly. Until then, please also note that the conformity SIP guidance of November 2004 also applies.
- Proposed Rule | PDF Version (24 pp, 212K, published May 2, 2007)
- Proposed Rule Fact Sheet | PDF Version (3 pp, 93K, EPA-420-F-07-018, April 2007)
Other Conformity Rulemakings
Chronological List of Transportation Conformity Rulemakings
- EPA has published rule amendments in the Federal Register since transportation conformity was enacted as part of the 1990 Clean Air Act. These rulemakings include preamble text explaining rule provisions that remain in effect today.
- EPA and the U.S. Department of Transportation have issued a number of guidance documents that provide additional information on implementing the conformity regulations.
For more information, contact Meg Patulski at 734-214-4842 or patulski.meg@epa.gov.