System expansion

With voter approval in 1996, 2008 and 2016, Sound Transit is building the most ambitious transit expansion in the country, with new service opening every few years.
Auburn Station Parking and Access Improvements

Status: Design phase

Improving station connections and adding parking.

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Ballard Link Extension

Status: Planning phase

Fast, reliable light rail connections residential and job centers in the Chinatown-International District, downtown, Interbay, and Ballard.

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Bus Base North

Status: Design phase

Adding a new bus maintenance and operations building and a parking structure for buses and other vehicles.

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Downtown Redmond Link Extension

Status: Construction phase

Extending East Link to downtown Redmond.

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DuPont Sounder Extension

Status: Voter approval phase

Adding two stations to the Sounder south line.

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East Link Extension

Status: Construction phase

Connecting the Eastside with reliable light rail.

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Edmonds and Mukilteo Stations Parking and Access Improvements

Status: Planning phase

Improving station connections and adding parking.

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Everett Link Extension

Status: Planning phase

Connecting Snohomish County jobs and housing.

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Federal Way Link Extension

Status: Design and construction phase

Kent Station Parking and Access Improvements

Status: Planning phase

Improving station connections and adding parking.

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Lakewood Station Access Improvements

Status: Planning phase phase

Improving station connections and adding parking.

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Lynnwood Link Extension

Status: Construction phase

Connecting Snohomish County with light rail.

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NE 130th St Infill Station

Status: Construction phase

Adding a station to the Lynnwood Link Extension

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North Sammamish Park-and-Ride

Status: Planning phase

Providing transit parking for Sammamish residents.

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Operations and Maintenance Facility East

Status: Open for service phase

Maintaining the growing light rail fleet.

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Operations and Maintenance Facility South

Status: Planning phase

Puyallup Station Parking and Access Improvements

Status: Open for service phase

Improving station connections and adding parking.

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Sounder Maintenance Base

Status: Planning phase

Efficient maintenance of the growing Sounder fleet

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Sounder South Capacity Expansion

Status: Planning phase

Improving station connections and adding parking.

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South Boeing Access Road Infill Station

Status: Voter approval phase

Serving Boeing Field & north Tukwila neighborhoods

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South Graham St Infill Station

Status: Voter approval phase

A new station between Columbia City and Othello

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South Kirkland-Issaquah Link

Status: Voter approval phase

Connecting Eastside communities with light rail.

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South Tacoma Station Access Improvements

Status: Planning phase

Improving station connections and adding parking.

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Stride S1 Line

Status: Design phase

Adding new bus rapid transit service along I-405 and SR 518 between Bellevue and Burien.

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Stride S2 Line

Status: Design phase

Adding new bus rapid transit service along I-405 between Lynnwood and Bellevue.

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Stride S3 Line

Status: Design phase

Adding new bus rapid transit service along SR-522 and Northeast 145th Street between Shoreline and Bothell.

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Sumner Station Parking and Access Improvements

Status: Design phase

Improving station connections and adding parking.

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Tacoma Dome Link Extension

Status: Planning phase

Connecting to Pierce County with regional light rail.

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TCC Tacoma Link Extension

Status: Voter approval phase

Extending Tacoma Link from Hilltop area to TCC.

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West Seattle Link Extension

Status: Planning phase

Will provide fast, reliable light rail connections to dense residential and job centers throughout the region. 

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Latest project updates
February 27, 2024
February 27, 2024
West Seattle Link Extension

Join us! WSLE Station Planning Open House

The Platform
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Latest project documents
Kent Station Access Improvements, Sounder Train, South King County

Kent Station Parking and Access Improvements 2024 fact sheet

(PDF Document | 465kB) Updated 02/23/2024
South Tacoma Station Access Improvements

South Tacoma engagement summary - Winter 2023-2024

(PDF Document | 1MB) Updated 02/21/2024
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See all project documents