State Route 3 (Washington)

State Route 3 (Washington)
State	WA
Type	SR
Length mi	87.76
Established	1964
Direction a	South
Terminus a	U.S. Route 101 in Aberdeen
Direction b	North
Terminus b	Interstate 5 in Auburn

State Route 3 (Washington) is a primary state highway serving the Olympic Peninsula, connecting coastal communities to inland corridors and linking with regional routes. The highway traverses diverse landscapes including urban centers, rural towns, military installations, and forested areas, providing a vital connection between U.S. Route 101, SR 16, and I-5. SR 3 supports freight, commuter, and tourist traffic and interfaces with transportation nodes like ports, military bases, ferry terminals, and railroads.

Route description

SR 3 begins near Aberdeen at an intersection with U.S. Route 101 and proceeds north through Grays Harbor County toward Mason County. The corridor passes near the Olympic National Forest, skirting communities such as Lake Cushman, Hoodsport, and Grapeview before reaching the urbanized area of Bremerton. Within Bremerton the route intersects SR 304 and SR 16, providing access to the Puget Sound Naval Shipyard, Naval Base Kitsap, and the Bremerton ferry terminal. North of Bremerton SR 3 continues as a divided highway through Poulsbo-adjacent areas and crosses the Hood Canal Bridge corridor connections toward Port Gamble and Hansville before entering Kitsap County suburbs.

Continuing north, SR 3 approaches Silverdale and intersects SR 303 and SR 305, forming multimodal links to Bainbridge Island, Kingston, and Suquamish. The highway then proceeds toward the Tacoma area, meeting SR 16 near the Tacoma Narrows Bridge corridor and providing freight connections to the Port of Tacoma and Port of Seattle. The northern terminus lies at an interchange with I-5 near Olympia-adjacent suburbs and industrial parks that serve the Pacific Northwest, Cascade Range, and Puget Sound regions.

History

Early routes that influenced SR 3 included indigenous trails used by Suquamish, Squaxin Island Tribe, and Quinault people and later wagon roads developed during the Washington Territory period. The corridor saw development with timber and shipbuilding booms tied to the Great Northern Railway and Northern Pacific Railway expansions. In the 20th century, state highway designations such as the pre-1964 system routes were consolidated into the present SR 3 during the 1964 renumbering. Improvements over decades included realignments to serve Bremerton Shipyard expansions, wartime mobilization for World War II, and Cold War-era growth supporting Naval Base Kitsap facilities.

Major upgrades occurred in response to population growth in Kitsap County and increasing commuter flows to Seattle and Tacoma, prompting projects tied to federal and state transportation funding mechanisms including interstate coordination with Federal Highway Administration programs. Bridge improvements, interchange reconstructions, and multilane expansions were undertaken near Silverdale, Bremerton, and the SR 16 junction amid environmental reviews involving National Marine Fisheries Service and U.S. Army Corps of Engineers oversight due to proximity to marine habitats and protected areas.

Major intersections

- Southern terminus: U.S. Route 101 near Aberdeen - Intersection with SR 8 providing access to Elma and Olympia - Junction with SR 104 near Hood Canal Bridge approach and Port Gamble - Concurrency and interchanges with SR 16 near Bremerton providing access to Tacoma Narrows Bridge - Connection to SR 304 serving Naval Base Kitsap, Bremerton ferry terminal, and Seattle–Bremerton ferry - Interchange with SR 303 and SR 305 near Silverdale and Bainbridge Island - Northern terminus: I-5 near Auburn/Puyallup corridor

Future

Planned projects for SR 3 focus on congestion mitigation, seismic resilience, and multimodal integration to serve growing populations in Kitsap County and commuting patterns to King County and Pierce County. Proposals under consideration by Washington State Department of Transportation include lane additions near Silverdale, interchange reconfigurations at SR 16 to improve freight access to the Port of Tacoma and Port of Bremerton, and safety enhancements near schools in Bremerton and Poulsbo. Environmental reviews engage agencies such as the U.S. Fish and Wildlife Service and Washington State Department of Ecology due to proximity to Hood Canal and Puget Sound. Long-term concepts contemplate transit priority corridors linking to Sound Transit light rail extensions, Kitsap Transit bus rapid transit, and park-and-ride expansions supporting links to Seattle–Tacoma International Airport.

Traffic and usage

SR 3 accommodates a mix of commuter, freight, military, and tourist traffic. Peak commuter flows reflect reverse-commuting patterns between Kitsap County communities and employment centers at Naval Base Kitsap, Naval Hospital Bremerton, Bremerton Shipyard, Port of Tacoma, and metropolitan centers like Seattle and Tacoma. Freight movements serve timber, manufacturing, and port-related industries linked to Port of Seattle, Port of Tacoma, and regional distribution centers near I-5. Traffic monitoring by Washington State Department of Transportation and regional planning bodies such as the Puget Sound Regional Council inform capacity projects, while transit agencies including Kitsap Transit and Sound Transit coordinate multimodal options. Seasonal tourist spikes occur with access to recreational sites like Olympic National Park, Hood Canal, and waterfront communities including Poulsbo and Bainbridge Island.

Category:State highways in Washington (state)