Washington State Department of Transportation

Washington State Department of Transportation
Department overview
FormedSeptember 21, 1977 (1977-09-21)[1]
Preceding agencies
  • Washington State Department of Highways
  • Washington State Aeronautics Commission
  • Washington State Toll Bridge Authority
  • Washington State Canal Commission
TypeDepartment of transportation
JurisdictionState of Washington
Headquarters310 Maple Park Avenue SE
Olympia, Washington, U.S.
47°02′05″N 122°53′52″W / 47.034700°N 122.897661°W / 47.034700; -122.897661
EmployeesIncrease approx. 6,900 (2024)[2]
Annual budget$11.505 billion (2023–2025)[3]
Department executive
Child department
Websitewsdot.wa.gov

The Washington State Department of Transportation (WSDOT or WashDOT, both /ˈwɒʃdɒt/) is a governmental agency that constructs, maintains, and regulates the use of transportation infrastructure in the U.S. state of Washington. Established in 1905, it is led by a secretary and overseen by the governor. WSDOT is responsible for more than 20,000 lane-miles of roadway,[4] nearly 3,000 vehicular bridges and 524 other structures. This infrastructure includes rail lines, state highways, state ferries (considered part of the highway system) and state airports.[5]

  1. ^ Oldham, Kit (March 15, 2005). "Legislature creates Washington State Department of Transportation (WSDOT) effective September 21, 1977". HistoryLink. Retrieved November 25, 2015.
  2. ^ McCarthy, Pat (June 23, 2025). "Accountability Audit Report, Department of Transportation, For the period July 1, 2022 through June 30, 2024". Office of the Washington State Auditor. Retrieved June 24, 2025.
  3. ^ "Executive Summary" (PDF). 2015-2017 Biennial Budget Request (Report). September 2014.
  4. ^ Multimodal Planning Division (February 17, 2024). State Highway Log Planning Report 2023, SR 2 to SR 971 (PDF) (Report). Washington State Department of Transportation. p. v64. Retrieved March 25, 2024.
  5. ^ WSDOT. "WSDOT Homepage". Retrieved July 15, 2008.

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