Preview our new website

Developing regional transit

Voter-approved plans

Sound Move, Sound Transit 2, Sound Transit 3 and other planning history documents.

History: what voters approved

Sound Transit 3 (ST3)

Sound Transit 2 (ST2)

Sound Move

The Board's role

Sound Transit is governed by an 18-member Board of local elected officials. The Board:

  • Establishes policies and gives direction and oversight
  • Shapes Long-Range Plan and ballot measures
  • Makes project decisions at critical milestones
  • Approves major contracts

The Board meets regularly in meetings that are open to the public.

Learn more

System Expansion Interactive Map

Consistent with voter-approved plans, Sound Transit is expanding the transit system with projects throughout the region. Explore these projects with the System Expansion interactive map.