System Expansion Progress Report

A woman smiling on a Link station platform holding a baby.
Two riders pose with the faces framed in cardboard cutouts of Link trains
Riders, one adult and one child, look out the window as they travel on the Link.
A family wearing Seattle sports gear pose for a photo at a Link station
A family smiles at each other as they walk through a Link light rail station
A group of jovial riders pose for a selfie
  • 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, 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 news on Sound Transit's current service and the largest transit expansion program in the nation.

A photo of map of Seattle with transportation related books strewn on top.
An overhead photo of the bridge across Lake Washington with both the highway and Link track in view.

ADDRESSING FUTURE FINANCIAL CHALLENGES

Delivering the ST3 vision

Like many agencies nationwide, Sound Transit is balancing transit operations and mega-project capital expansions, while also facing escalating costs. 

The “Enterprise Initiative” is Sound Transit’s comprehensive effort aimed at delivering the maximum benefits of ST3 within available financial resources. As part of this effort, the Sound Transit Board is evaluating different approaches to updating the ST3 System Plan in summer 2026.

ST3 includes light rail extensions to West Seattle, Ballard, Tacoma, and Everett, new service between South Kirkland and Issaquah, and much more. 

A crowd of people waiting to board a train at a Link station.

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.

KEY

New service
Parking & access
Operations & maintenance facilities
Link light rail
Sounder rail
Stride bus rapid transit

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. 

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