To learn about Sound Transit's current and planned projects explore the new System Expansion interactive map. This website is no longer being updated.
The ST3 plan would complete major mass transit extensions every few years over a 25-year period. To learn about specific project times, view the... more
The Sound Transit 3 measure will be decided by voters within the more
Major infrastructure projects require significant time to plan, design and build. Sound Transit heard loud and clear strong interest from around... more