TagWSDOT(123)

RCW 47.06.140 defines transportation facilities and services of statewide significance in Washington State, including highways, the interstate system, ferry routes, freight railroads, and high-capacity transit systems, while explicitly excluding airport facilities and services from this designation. The law requires the Washington State Department of Transportation to set level of service standards for state highways and ferry routes, in consultation with local governments, while retaining final decision-making authority. Improvements to these statewide facilities are classified as essential state public facilities under RCW 36.70A.200.

The City of Burien and the Washington State Department of Transportation (WSDOT) have entered into a Memorandum of Understanding regarding the SR 509 Completion Project Stage 2, which extends the highway from S 188th Street to 24th Avenue South, with portions running through Burien's city limits. The project includes construction of a shared-use path, two roundabouts on S 160th Street, and short noise wall segments adjacent to highway on-ramps. WSDOT is responsible for costs associated with the proposed design and construction, while Burien bears costs for any changes it requests beyond standard design requirements.

The SR 509 Completion Project extends State Route 509 from 24th Avenue South to South 160th Street near Sea-Tac Airport, adding new interchanges, roundabouts, and connections to southbound I-5 and toward Seattle. Key features include a new interchange at South 188th Street with a shared-use path and Lake to Sound Trail access, as well as a South 160th Street interchange with noise walls to protect nearby residents. The project also includes wetland mitigation sites and infrastructure improvements along the Des Moines Memorial Drive corridor.

Letter from Washington Democratic Delegation to SecDOT to fund Cascadia Bullet Train

The Washington Aviation System Plan is a 20-year statewide guide aimed at building a more integrated, multimodal air transportation network across Washington State. Signed by Secretary of Transportation Roger Millar, the plan highlights aviation's role as an economic driver, community connector, and environmental tool, citing benefits such as expanded travel options, improved emergency services, and reduced carbon emissions. It calls for collaboration among federal, state, local, and tribal governments, communities, and the aviation industry to meet the state's growing transportation needs.

South Access Road Section 4(f)

This document compiles frequently asked questions about Washington State's Commercial Aviation Coordinating Commission (CACC), which is studying potential locations for a new commercial airport in the region. It covers how the Commission was formed, what studies have been used to evaluate possible sites, and how environmental concerns—such as impacts on aquifers, the Nisqually River watershed, and tribal treaty rights—factor into site selection. The CACC can only recommend a site to the State Legislature, which retains final authority over any next steps.