Air quality

All WSDOT projects must comply with the Clean Air Act and Amendments of 1990, the Washington State Clean Air Act, local requirements, and follow agency guidance. Use the webpages linked below to determine what type of analysis and documentation your project requires and for instruction on completing required analyses and documentation.

Determine what type of analyses your project will require

Refer to the Air Quality Analysis Decision Tree (PDF 201KB) to determine which types of analyses your project requires. If your WSDOT project needs an analysis, inform the Environmental Documentation and Permit Specialist assigned to your project. See list of exempt project types in WAC 173-420-110.
 

Learn more about work zone safety

Slow down – lives are on the line.

Drive the posted speeds, they’re there for your safety.

Phone down, eyes up.

Pay attention – both to workers directing you and to surrounding traffic.

Stay calm

Expect delays, leave early or take an alternate route if possible; no appointment is worth risking someone’s life.