History: what voters approved

Sound Transit plans, builds and operates express bus, light rail and commuter train services and serves the urban areas of King, Pierce and Snohomish counties.

Sound Transit 2

Expanding the regional mass transit system

In 2008, the region's voters approved the Sound Transit 2 (ST2) ballot measure. This 15-year program authorized substantial additions to ST Express bus and Sounder commuter rail service, plus 36 miles of new Link light rail service to form a truly regional system. Highlights include:

  • More ST Express bus service on the busiest routes
  • Four new daily Sounder round trips on the popular south line, plus improved station access
  • Link light rail service north to Lynnwood, east to the Overlake area and south of Sea-Tac Airport

Documents: Sound Transit 2 Plan

Sound Move

In 1996, voters approved Sound Move, the first phase toward realizing the long-term vision of a regional high capacity transit system. This vote authorized the creation of Sound Transit, tax collections for funding, and the first set of regional transit projects. These included: 

  • Light rail service between Sea-Tac Airport and the University of Washington, with a northward extension to Northgate dependent upon additional funding
  • Peak period commuter rail from Lakewood and Everett to Seattle
  • ST Express bus routes linking the region's population and employment centers
  • Capital investments in transit facilities (transit centers, park-and-ride lots, etc.) plus HOV direct access ramps that improve bus speed and reliability

Sound Move documents

Planning history

Sound Transit has been building the foundation of the regional mass transit system approved by voters.

Many historical system planning documents are available online.

Planning documents 

Not all documents are on the website. Contact us if you have questions.