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Office of Planning, Environment, & Realty (HEP)

CAA and Transportation Conformity Regulations

The air quality provisions of the Clean Air Act as amended (42 USC Sections 7401-7671q) establish restrictions on emission reductions from transportation sources. Regulations governing transportation conformity are found in Title 40 of the Code of Federal Regulations (40 CFR Parts 51 and 93).

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Updated: 8/6/2013
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All Federal Highway Administration (FHWA) information technology systems will be unavailable, Friday, December 2, at 10:00 p.m. to Sunday, December 04, at 11:59 p.m., EDT, while work is being performed on the network. During that time, users will not be able to access any FHWA systems.

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