The H Line is a RapidRide bus route in Seattle, Washington, United States. It is operated by King County Metro and uses bus rapid transit features, including transit signal priority, exclusive lanes, and off-board fare payment at some stations. The H Line began service on March 18, 2023, replacing Route 120 after the construction of new stations and bus lanes at a cost of $154 million.[1] The H Line is the seventh RapidRide line to open and features stations with digital e-ink screens for real-time arrivals information, ORCA card readers, and larger shelters. It is the first RapidRide line to open under the Move Seattle program, which was funded by a levy approved in 2015.[1]