Public transportation is available for travel to Washington DC by Amtrak or by bus. The train and the Greyhound, Megabus and Bolt buses all arrive at Union Station, 50 Massachusetts Ave NE, Washington, DC 20002
The Metro (Washington Metropolitan Area Transit Authority) operates a regional rail and bus system.
VRE (Virginia Railway Express), www.VRE.org
All of the to DC trains stop at Union Station. From Union Station you can take the Metrorail (Red Line) or Metrobus to Catholic University (CUA). www.wmata.com for more information.