Washington State Aviation System Plan, Pilot Registration, etc.
Washington State Highway Map
Transportation Plan, Route Development, Trends and more...
Gray Notebook (Measures, Markers and Mileposts)
Accountability and performance publications
Request a copy of an officer or citizen collision report
Collision Data Request
Request collision data
Manuals and Technical Specs
Design Manual and other design publications
On-Line Technical Manual Library, Publication Search, etc.
Guidelines for dealing with Hazardous and Problem waste sites.
Sources to assist hydraulic designers
Manuals - Engineering Publications
Manual on Uniform Traffic Control Devices
Standards for traffic control devices installed along state highways
Searchable collection of research reports published by WSDOT
Chapters include laws and policies, visual functions, wetlands, wildlife, safety rest areas, soil amendments, contour grading, soil bioengineering, vegetation, restoration, and design enhancement.
Design Standards, View or Download Plans
MUTCD, Traffic Manual, Standards Specifications, etc.