Answer:
State Route 7 (SR 7) is a major primary state highway and busy commuter route in northern Virginia, United States. It travels southeast from downtown Winchester to SR 400 (Washington Street) in downtown Alexandria. Its route largely parallels those of the Washington & Old Dominion Trail (W&OD Trail) and the Potomac River. Between its western terminus and I-395, SR 7 is part of the National Highway System.
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