State Route 8 (SR 8) is a state highway in Grays Harbor and Thurston counties, of the U.S. state of Washington. It extends 20.67 miles (33.27 km) from...

Since the 1964 state highway renumbering, which established the current state route system, the Washington State Department of Transportation has decommissioned...

State Route 99 (SR 99), also known as the Pacific Highway, is a state highway in the Seattle metropolitan area, part of the U.S. state of Washington. It...

pass through the state, maintained by the Washington State Department of Transportation (WSDOT). The system spans 8.5% of the state's public road mileage...

State Route 20 (SR 20), also known as the North Cascades Highway, is a state highway that traverses the U.S. state of Washington. It is the state's longest...

State Route 522 (SR 522) is a state highway in the U.S. state of Washington that serves the Seattle metropolitan area. Approximately 25 miles (40 km)...

State Route 599 (SR 599) is a state highway and freeway in King County, Washington, United States. It is located entirely within the city of Tukwila and...

State Route 900 (SR 900) is a state highway serving part of King County, Washington, United States. It travels 16 miles (26 km) between southern Seattle...

State Route 539 (SR 539, named the Guide Meridian) is a north–south state highway in the U.S. state of Washington. The highway travels through northwestern...

State Route 167 (SR 167) is a state highway in the Seattle metropolitan area of Washington state. It is commonly known as the Valley Freeway and serves...