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.
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Latest project updates
February 20, 2019 Mercer Island Station, East Link Extension

Upcoming I-90 Ramp Closures

The Platform
Beginning soon community members will start seeing progress take root on a powerful new alternative to I-5’s rising congestion. Light rail is…
Sound Transit is preparing to kick off our environmental review for building the new light rail operations and maintenance facility (OMF) in the…
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Latest project documents
Operations and Maintenance Facility South, South King County, Pierce County, Regional, Other project types, Environmental, Public outreach

Operations and Maintenance Facility South Alternatives Evaluation Technical Memorandum

(PDF Document | 9MB) Updated 02/19/2019
Operations and Maintenance Facility South, South King County, Pierce County, Regional, Other project types, Environmental, Public outreach

Operations and Maintenance Facility South Alternatives Evaluation Technical Memorandum

(PDF Document | 9MB) Updated 02/19/2019
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See all project documents