SR 90 is a state route located in the United States, primarily serving as a major roadway in the state of Washington. It connects various cities and regions, facilitating transportation and commerce. The route is known for its scenic views and accessibility to both urban and rural areas. The highway plays a crucial role in local travel, linking communities and providing access to important destinations. SR 90 is part of a larger network of state routes that help maintain efficient traffic flow and support economic activities throughout the region.