Sound Transit’s 2026 Service Plan (Phase 4)

ST Express 554 and King County Metro 204 buses at Mercer Island stop. (Bruce Englehardt)

Earlier this week, Sound Transit shared an updated proposal for its ST Express restructure that will be implemented later this year. In response to the initial ST Express restructure proposal, Sound Transit received nearly 4,500 survey responses and in-person feedback at three open house events. Using that input, the agency has proposed minor adjustments for a few routes.

Sound Transit is accepting feedback on the new proposal between now and February 9, 2026. To provide feedback, attend one of the open house events listed below, or email servicechanges@soundtransit.org.

Information Sessions:

• January 30from 12 to 1 pm
• February 3from 6 to 7 pm

New Changes

Since the previous ST Express restructure proposal, only the routes below have been updated.

Route 574

The proposed Route 574 will run every 15 minutes between Lakewood station and Federal Way Downtown station, via Tacoma Dome station. In the previous proposal, Route 574 continued from Lakewood station to Lakewood Transit Center.

Night-Owl Routes

In the initial proposal, Sound Transit introduced three new overnight routes between Seattle and Everett, Redmond, and Lakewood. The latest proposal does not have any significant new details, but a new map of the routes shows a few routing changes. Seattle Transit Blog has reached out to Sound Transit to confirm the changes shown in the new map. The exact route frequencies and timings are still in development.

Other Service Proposals

The following route proposals have not changed since the Fall 2025 proposal.

• 513: Bi-directional peak service between Lynnwood and Seaway TC. The route will no longer stop at Eastmont P&R.
• 515: Discontinued, use the 1 Line and 2 Line instead.
• 522: 15 minute frequency everyday between UW Bothell and Shoreline South station. Every other trip would be extended to serve Woodinville. Metro routes 72 and 77 will provide service between Lake City and Roosevelt or U District stations.
• 535: 30 minute frequency everyday between Lynnwood and Bellevue.
• 550: Discontinued, use the 2 Line or Route 556 instead.
• 554: Discontinued, use the 2 Line or Roue 556 instead.
• 556: 15 minute frequency everyday between Issaquah and Bellevue. Route 556 will serve local stops on Gilman Blvd in Issaquah and on Bellevue Way in Bellevue.
• 574 (mentioned above): 15 minute frequency everyday between Lakewood and Federal Way.
• 580: Discontinued, use Pierce Transit Route 400 instead.
• 586: Discontinued, use the 1 Line, Sounder S Line, or routes 577, 590, 594 instead.

Unchanged Routes

Sound Transit is not planning any significant changes to the following routes: 510, 512, 532, 542, 545, 560, 566, 577, 578, 590, 592, 594, 595, and 596.