Transportation Conformity Requirements



This page last reviewed November 20, 2017


Under the Clean Air Act, federally supported transportation activities must be consistent with the State Implementation Plan (SIP). The process for assessing this consistency is known as transportation conformity. Conformity usually involves a comparison of estimated emissions from on-road motor vehicles with emissions "budgets" set forth in the SIP.


  • Transportation Conformity in a Nutshell
  • Currently applicable motor vehicle emissions budgets

For more information, please contact: Nesamani Kalandiyur at (916) 324-0466



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