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.