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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Downtown Redmond Link Extension

Status: Planning 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: Voter approval phase

Connecting Snohomish County jobs and housing.

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Federal Way Link Extension

Status: Design phase

Hilltop Tacoma Link Extension

Status: Construction phase

More than doubling the length of Tacoma Link.

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I-405 Bus Rapid Transit

Status: Planning phase

Fast bus connections to light rail and more.

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Kent Station Parking and Access Improvements

Status: Planning 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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North Sammamish Park-and-Ride

Status: Planning phase

Providing transit parking for Sammamish residents.

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NE 130th St Infill Station

Status: Voter approval phase

Adding a station to the Lynnwood Link Extension

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Northgate Link Extension

Status: Construction phase

Extending the light rail tunnel to north Seattle.

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Operations and Maintenance Facility East

Status: Construction 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: Design 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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SR 522/NE 145th Bus Rapid Transit

Status: Planning phase

Connecting north Lake Washington communities.

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Sumner Station Parking and Access Improvements

Status: Design phase

Improving station connections and adding parking.

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TCC Tacoma Link Extension

Status: Voter approval phase

Extending Tacoma Link from Hilltop area to TCC.

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Tacoma Dome Link Extension

Status: Planning phase

Connecting to Pierce County with regional light rail.

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West Seattle and Ballard Link Extensions

Status: Planning phase

Serving regional jobs, entertainment destinations.

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Latest project updates
December 6, 2019
Federal Way Link Extension

Hurry! Online Open House ends Dec. 13

December 5, 2019
December 5, 2019
The Platform
This holiday season, we’re thankful for all of the work that’s gone into expanding our region’s transit system.  One of the highlights of 2019 was…
The West Seattle and Ballard Link Extensions will provide fast, reliable light rail connections when they open in 2030 and 2035.  We know that seems…
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Latest project documents
East Link Extension, East King County, Link Light Rail, Environmental

East Link Extension FTA Record of Decision

(PDF Document | 3MB) Updated 12/05/2019
East Link Extension, East King County, Link Light Rail, Environmental

East Link Extension FTA Record of Decision

(PDF Document | 3MB) Updated 12/05/2019
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See all project documents