The West Busway is a two-lane bus-only highway serving the western portions of the city of Pittsburgh and several western suburbs. The busway runs for 5.1 miles from the southern shore of the Ohio River near Downtown Pittsburgh to Carnegie, following former railroad right-of-way on the Panhandle Route. It broke ground on October 27, 1994 and is owned and maintained by the Port Authority of Allegheny County, the public transit provider for Allegheny County and the Pittsburgh region. The transit thoroughfare was opened in September 2000. Following the naming convention of each busway being designated by a color, bus routes that use the West Busway begin with a "G" for green.