King County Metro breaks ground on RapidRide I Line, US March 25, 2026 | News, North America News The King County Metro Transit Department (King County Metro) has broken ground on the RapidRide I Line, a USD174 million, 27.35-km project that will transform the existing Route 160 corridor into a hi... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password