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Western portal of Blue Mountain Tunnel
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Largo interlocking
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Metro D Route pocket track [02]
![Metro D Route pocket track [02]](../../../../i/upload/2024/07/15/20240715141423-2fe25243-cu_s9999x250.jpg "Metro D Route pocket track [02] (3349 visits) D Route pocket track on the Washington Metro system, showing the interlockings and the signal. This ...")
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POLICE LINE DO NOT CROSS
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Police barrier
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Railroad crossing at Maiden Lane [01]
![Railroad crossing at Maiden Lane [01]](../../../../i/upload/2025/03/08/20250308225400-a196ec7a-cu_s9999x250.jpg "Railroad crossing at Maiden Lane [01] (903 visits) CSX locomotive 2783 leads a freight train as it passes the railroad grade crossing at Maiden Lane in...")