 The Greenbelt portion of the Baltimore–Washington Parkway (B–W Parkway) is part of the parkway's 19-mile section which was listed on the National Register of Historic Places in 1991.Additionally, Greenbelt Road is part of state highway MD 193, which connects several suburban communities in both Prince George's and Montgomery counties.Kenilworth Avenue (MD 201) traverses Greenbelt in a north–south direction, running parallel to the B–W Parkway, providing an alternate travel route into Washington, D.C., from Greenbelt.