Link light rail

Link light rail is a light rail rapid transit system serving the Seattle metropolitan area in the U.S. state of Washington. It is managed by Sound Transit, in partnership with local transit providers, and consists of two non-connected lines: the Red Line in King County, which travels for 20 miles between Seattle and Seattle–Tacoma International Airport; and the Orange Line in Pierce County, which runs for under 2 miles between Downtown Tacoma and Tacoma Dome Station. The system carries 24.1 million passengers annually, primarily on the Red Line, and runs trains at frequencies of 6 to 24 minutes.

The Link light rail system was originally conceived in the 1980s following several earlier proposals for a heavy rail system that were rejected by voters. Sound Transit was created in 1993 and placed a ballot measure to fund and build the system, which was passed on a second attempt in 1996.