Washington State Department of Transportation
| Department overview | |
|---|---|
| Formed | September 21, 1977 | 
| Preceding agencies | 
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| Type | Department of transportation | 
| Jurisdiction | State of Washington | 
| Headquarters | 310 Maple Park Avenue SE Olympia, Washington, U.S. 47°02′05″N 122°53′52″W / 47.034700°N 122.897661°W | 
| Employees | 6,318 | 
| Annual budget | $11.505 billion (2023–2025) | 
| Department executive | 
 | 
| Child department | |
| Website | wsdot.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, 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.