Alaskan Highway

The process of Conformity ensures a transportation plan, program project, or federal action within a non-attainment or maintenance area will not hinder attainment of the national ambient air quality standards in the area.

All agencies with projects located within non-attainment and maintenance areas are encouraged to contact local air quality agencies to:

  • Determine if the emissions from their projects have been included in the emission inventories of approved SIPs/Maintenance Plans
  • If not, provide the information required so that emissions from planned projects can be included in future SIP revisions

    The benefit of having a project included in an approved SIP/Maintenance Plan is that no further analysis is required for general conformity. A hot-spot analysis may, however, be required for specific transportation projects depending on the criteria specified in Transportation Project Analysis.