Greenbelt, Maryland in a north-south direction, running parallel to the B–W Parkway, providing an alternate travel route into Washington, D.C., from Greenbelt. The southernmost Maryland portion of Kenilworth Avenue forms a major interchange with both the B–W Parkway and US 50 near the Maryland–D.C. line, and continues into Washington, as the Kenilworth Avenue Freeway (DC 295). Washington Metro′s rapid transit rail system serves Washington, D.C., and neighboring communities in Maryland and Northern Virginia, by operating 91 Metro stations, which includes the Greenbelt station, the northern terminus of Metro′s Green Line. Commuter rail service to the station is provided by MARC Train′s Camden
Washington, DC Metropolitan Area Special Flight Rules Area Within the ADIZ is an even more sensitive zone designated the "Washington, D.C. Metropolitan Area Flight Restricted Zone" (DC FRZ). The DC FRZ extends approximately around the DCA VOR/DME. Flight within the FRZ is restricted to governmental, certain scheduled commercial and a limited set of waivered flights. Three general aviation airports (known as the "Maryland 3" or the "DC 3") are located inside the DC FRZ: College Park Airport (CGS), Washington Executive/Hyde Field (W32), and Potomac Airport (VKX). Pilots' groups, led by the Aircraft Owners and Pilots Association (AOPA), have argued that the ADIZ is unnecessary and has a harmful