System Expansion Progress Report

People gathered at the ribbon cutting for Downtown Redmond Link Extension celebrate as confetti falls.
  • Spring/Summer 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 Spring/Summer Progress Report below for the latest info on the nation’s largest transit expansion program.

An aerial view of the bridge where light rail trains will cross Lake Washington.
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

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

Beyond transit

Making our region more livable

Whether you ride transit or not, we all benefit from fewer cars on our roadways, a cleaner and greener environment, more affordable housing, and equitable access to opportunities and services across our region. In each triannual Progress Report update, we’ll bring you a new perspective on what this work means for you.

Workers perform construction work in the Seattle transit tunnel.
A worker installs an art piece at a light rail station.