Arlington is served by the Washington Metropolitan Area Transit Authority (WMATA or Metro), the regional transit agency covering parts of Virginia, Maryland, and the District of Columbia. Arlington has stations on the Orange, Blue, Yellow, and Silver lines of the Washington Metro rail system. The Metro stations in Arlington are the only stations outside of Washington, D.C., where the system's original Brutalist architecture can be found. Arlington is also served by WMATA's regional Metrobus service. This includes Metroway, the first bus rapid transit (BRT) in the D.C. area, a joint project between WMATA, Arlington County, and the City of Alexandria, with wait times similar to those of Metro trains. Metroway began service in August 2014.