System Expansion Progress Report

A rider in a wheelchair smiles at a light rail station.
A rider smiles in front of an ST Express bus.
A passenger in Sound Transit shop gear stands on a station platform as a light rail train moves by.
A passenger holding a phone at a Sounder station.
A family smiles at a light rail opening celebration.
A passenger with a bike at a Sounder station.
  • Fall/Winter Progress Report

Latest updates

Welcome, neighbor

If you live within the Sound Transit district, you’ve been making a big investment in tomorrow. Your tax dollars are helping build the 252-mile regional network that will connect communities across three counties—plus creating more affordable housing and ensuring a greener and more equitable future for generations to come.

That’s important work, and we want to show you how it’s going. Explore our Fall/Winter Progress Report below for the latest info on the nation’s largest transit expansion program.

A Link light rail train travels the new Federal Way extension during testing.
A light rail train traverses the I-90 bridge during testing.

Expanding service

Regional and neighborhood connections

Use the interactive future system map below to take a deeper dive into Sound Transit projects across the region.

Tap the pulsing dots for more information about each project, and follow the link for more details to sign up for project updates and get involved.

A list of Sound Transit system expansion projects

A rendering of a Stride bus at a station.
A rendering of the garage at Sumner Station.

Ride now

How to plan, pay, and ride with us

We’ve made it easy to find everything you need to ride Sound Transit’s Link light rail, Sounder trains, and ST Express buses. Plan your trip, learn how to pay your fare, and hop on board today!

Ride the wave

A worker monitors Sound Transit stations from a desk.

Beyond transit

How we do business: Delivering voter-approved plans

Learn more about Sound Transit’s governance, funding sources, and how you can join us in transforming the Central Puget Sound region and connecting more people to opportunity. 

Attendees of the Sound Transit Youth Conference chat inside The Great Hall at Union Station.

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