Highway System Plan

The Washington State Highway System Plan (HSP) is the state highway component of the Washington Transportation Plan (WTP). The WTP is the state's overall transportation plan that includes facilities the state owns and those in which the state has an interest, and outlines the policies adopted by the Washington State Transportation Commission. The HSP serves as the basis for the six-year highway program and the two-year biennial budget request to the State Legislature. WSDOT is dedicated to delivering an HSP that implements the Legislature's goals. This is accomplished through the coordination and integration of specific components from many statewide modal and program plans. WSDOT aims first to maintain, preserve, and improve the operating efficiency of the existing highway system before adding to the system.

HSP Documents


Jeremy Jewkes
Transportation Planning Specialist