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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.
Proposed Rule
- Proposed Rule | PDF Version (21 pp, 413K, published May 15, 2009 )
- Fact Sheet: Proposed Rule | PDF Version (3 pp, 188K, EPA-420-F-09-005, May 2009)
- 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.
- 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.
Transportation Conformity Rule: PM2.5 and PM10 Amendments (published May 15, 2009)
This proposal would amend the conformity regulation in light of the October 17, 2006, final rule that strengthened the 24-hour PM2.5 air quality standard and revoked the annual PM10 standard. The proposal also addresses a court remand concerning hot-spot analyses; this portion of the proposal applies to PM2.5 and PM10 and carbon monoxide nonattainment and maintenance areas.Interim Transportation Conformity Guidance for 2006 PM2.5 Nonattainment Areas
Current Laws and Regulations
Other Conformity Rulemakings
Chronological List of Transportation Conformity Rulemakings
For more information, contact Meg Patulski at 734-214-4842 or patulski.meg@epa.gov.