Sound Transit fleet

Sound Transit is a regional public transit system in the Seattle metropolitan area that provides light rail, commuter rail, and express bus service. As of 2025, the system has a fleet of over 558 vehicles for its services, which carry over 42 million passengers annually. These include 226 rail cars on Link light rail; 78 passenger cars and 14 locomotives on Sounder commuter rail; and 240 buses on Sound Transit Express. The entire fleet is accessible per requirements from the federal Americans with Disabilities Act of 1990, with low-floor light rail vehicles and buses as well as ramps for commuter trains. Sound Transit's trains and buses share the same livery design, known as the "wave", comprised of blue, teal, and green stripes over a white background.

The Link light rail fleet is divided between four models: the Series 1 and Series 2 on the main network, which use 95-foot (29 m) multiple-unit cars; and two generations of shorter streetcars for the T Line in Tacoma. The Series 1 and Series 2 are able to run with multiple cars, up to four per train, and are powered by an overhead catenary powered at 1,500 volts. They are operated by King County Metro and maintained at two facilities in Seattle and Bellevue. The T Line streetcars, maintained directly by Sound Transit, operate as single cars and are powered by an overhead catenary at 700 volts. Sounder uses bilevel passenger cars on its two lines that are maintained by Amtrak and operated by BNSF Railway. Sound Transit Express is contracted out to three local transit agencies and uses a variety of bus types that include articulated and double-decker models. These buses have between 37 and 82 coach-style seats and the largest can carry up to 101 passengers.