The SR 509 Completion Project builds three new miles of SR 509 and completes the unfinished SR 509 in south King County. This new four-lane highway will become an important north-south alternative to the congested I-5 corridor between Seattle and south King County.

State Route 509 (SR 509) is a 35.17-mile-long (56.60 km) state highway in the U.S. state of Washington, connecting Tacoma in Pierce County to Seattle in King County.

2 天之前 · A direct SR 509 Expressway is set to open in October, connecting I-5 to Burien after years of construction near I-5 and the Kent Des-Moines Road.

The SR 509 Completion Project will ultimately extend SR 509 to I-5 in SeaTac. People traveling through the area will have a new southern route to get to Sea-Tac International Airport and be able to bypass I-5, SR 518, and local streets.

2023年12月7日 · The SR 509 Completion Project builds a new four-lane, 3-mile-long tolled expressway. Completing this long-planned connection will help reduce congestion on local roads and highways by providing more direct access to Sea-Tac Airport from the south for both passengers and air cargo and the Port of Seattle for marine shipping.

The SR 509/24th Avenue South to South 188th Street New Expressway project is the final stage of the SR 509 Completion Project improvements, which connects SR 509 to I-5 in SeaTac.

2024年9月25日 · SR 509 Completion Project will connect the 50-year-old highway to I-5 SEATAC – Community, industry and elected leaders joined together in SeaTac on Wednesday, Sept. 25, to celebrate the beginning of construction on the final stage of the State Route 509 Completion Project in south King County.

WSDOT is starting construction on the State Route 509/24th Avenue South to South 188th Street New Expressway project in 2024. This project is the final, fully-funded stage (Stage 2) of the SR 509 Completion Project.

6 天之前 · The Puget Sound Gateway Program between Seattle and Tacoma will help reduce congestion in central Puget Sound and improve freight movement with the addition of new tolled expressways on SR 509 and 167. Tolling is expected to begin in October on the first portion of the new SR 509 expressway, with additional segments opening in phases.

Phase 1A, the new SR 99 Bridge near South 208 th Street is targeted for completion in 2022. The design build contract for Phase 1B (the expressway from24th Avenue South to Interstate 5) has been awarded; construction is anticipated to begin in …