WMATA had a sizable fleet of RTS buses up until their retirement in 2001. However, their tenure was not without issue. At one point, the fleet had to be pulled due to the rear doors opening unexpectedly while the buses were in motion. However, these issues were ultimately resolved and the buses were returned to service. Bus 9112, the only RTS to have a suburban interior configuration, is still in the historic fleet.
GMC RTS Buses at the Fort Totten Service Lot, September 17, 2000
GMC RTS 9071 at Rockville Station, January 21, 2000