Interstates & state routes

View interactive maps of all the mileposts and Interstate exits on the Washington state highway system, or download and print PDF maps of the Washington state highway system.

Milepost markers map application

Milepost Marker Map Application displays milepost information along Interstates, US Highways, and State Routes. Information is provided to to the nearest 1/10th of a mile.

Interstate highway exits map application

Interstate Exits Map Application displays Interstate exit ramp location information. Information is shown at the beginning of exit ramps on Interstate routes and provide details about the road the ramp exits from and the road it exits to in addition to the exit numbers where available.

Printable state highway maps

You can use the printable maps to assist with trip planning and travel.

14 fish passage projects were completed in 2020

improving access to 54.2 miles of upstream habitat.

11,959 incidents responded to

by WSDOT’s incident Response teams during second quarter of 2021, 15% more than same quarter in 2020.

41 Pre-existing Funds Projects Advertised

during the eighth quarter of the 2019-2021 biennium.