System expansion

Voters approved projects in in 1996, 2008, and 2016. Sound Transit is building the most ambitious transit expansion in the country.
Auburn Station Parking and Access Improvements

Status: Design phase

Improving station connections and adding parking.

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Boeing Access Road Infill Station

Status: Voter approval phase

Serving Boeing Field & north Tukwila neighborhoods

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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

Graham St Infill Station

Status: Voter approval phase

A new station between Columbia City and Othello

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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.

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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 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.

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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
October 11, 2024
Ballard Link Extension

Update: Scoping timeline

The Platform
Earth Day 2024 was a good reminder of the magnitude of our environmental responsibility; a responsibility that is front and center at Sound Transit.…
No matter where you live in the region, you’ve probably noticed our construction projects – and many of these build sites are getting busier by the…
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Latest project documents
South Boeing Access Road infill light rail station

Boeing Access Road - Engagement Summary Report

(PDF Document | 170kB) Updated 10/08/2024
South Graham Street infill light rail station

Graham Street Station - Engagement Summary Report

(PDF Document | 173kB) Updated 10/08/2024
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