Air Quality Contacts
For more information, please contact Karen Perritt (202-366-9066).
Complete Transportation Conformity Rule (HTML version) or (PDF version)
Complete Preamble Language and Conformity Rulemakings
Subpart T--Conformity to State or Federal Implementation Plans of Transportation Plans, Programs, and Projects Developed, Funded or Approved Under Title 23 U.S.C. or the Federal Transit Laws §51.390 Implementation plan revision.
Subpart A--Conformity to State or Federal Implementation Plans of Transportation Plans, Programs, and Projects Developed, Funded or Approved Under Title 23 U.S.C. or the Federal Transit Laws