Alexandria Transit Company (ATC) is a non-profit service corporation wholly owned by the City of Alexandria and currently operates 124 buses, including the King Street Trolley. ATC provides a fixed-route bus service within the City of Alexandria on nine routes and carries more than four million passengers annually. ATC operates transit services within portions of the City of Alexandria and between the City and the Pentagon Metrorail Station. ATC's purpose is to supplement the regional rail and bus service provided by the Washington Metropolitan Area Transit Authority (WMATA) and to provide a local bus service to the City of Alexandria.