Harbor Transitway is consisted mostly of a set of carpool lanes and bus stations in Interstate 110. Because most bus stations are located in the freeway median, freeway buses can stay totally on the carpool lanes north of the 91 freeway, providing a service similar to rail.
Several transit operators use the transitway between downtown LA and their respective destinations. North of USC, buses travel on city streets in Downtown LA.
Unlike the nearby Line, buses on the transitway charge express fares. All fares are paid onboard like other buses.
Not all routes serve all Transitway stops.