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 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.

Slow down on ice and snow.

It's easier to skid or lose control traveling at higher speeds. Give yourself more time to stop.

Carry chains, practice installing them.

Winter conditions could mean chains are required on your route. Practice putting them on your vehicle ahead of time.

Pack your winter car kit.

Carry extra supplies like warm clothing, ice scraper and brush, jumper cables and other emergency items.