Union Station, located north of the Capitol, is the District's one rail terminal, from which Amtrak provides passenger service to the northeast corridor and southern points. In the mid-1990s, Amtrak operated about 75 trains per day into Union Station. In all, four railroads operate 45 rail mi (72 km) of track. The Washington Metropolitan Area Transit Authority, or Metro, operates bus and subway transportation within the city and its Maryland and Virginia suburbs. About 40% of working District residents commute by public transportation. In 1994–95, the federal Transit Authority awarded grants of $199 million for the Metro.
Within the District, as of 2000, were 1,425 mi (2,293 km) of public streets and roads; 243,557 motor vehicles were registered, and 348,216 driver's licenses were in force. Three major airports handle the District's commercial air traffic: Ronald Reagan Washington National Airport, just south of the city in Virginia; Dulles International Airport in Virginia; and Baltimore-Washington International Airport in Maryland. Washington National Airport was officially renamed Ronald Reagan Washington National Airport in February 1998 by the US Congress and President Clinton.