As part of the greater Portland metropolitan area, Oregon City is served by TriMet, the regional transit authority, with several bus lines which converge at the Oregon City Transit Center. Until 1958, an interurban trolley line operated by the now-defunct Portland Traction Company connected Oregon City with Portland; remnants of this line are still visible (such as an abandoned bridge across the Clackamas River, just east of the OR 99E bridge). In more recent years, the city operated a "historic trolley" service during the summer months, primarily to serve the needs of tourism, but the vehicles used were trolley-replica buses, rather than actual trolley cars, and in 2013 it was decided to discontinue that service and sell the vehicles.