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Metro D Route pocket track [01]
![Metro D Route pocket track [01]](../../../../i/upload/2024/07/14/20240714235123-98bd274e-cu_s9999x250.jpg "Metro D Route pocket track [01] (2383 visits) D Route pocket track on the Washington Metro system, showing the interlockings and the signal. This ...")
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East Falls Church interlocking
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Largo interlocking
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Vienna 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] (2678 visits) D Route pocket track on the Washington Metro system, showing the interlockings and the signal. This ...")
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Silver Spring pocket track
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Largo Town Center interlocking
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Eisenhower Avenue interlocking
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Acela Express door mode switch
![Acela Express door mode switch](../../../../i/upload/2024/07/16/20240716231527-66913270-cu_s9999x250.jpg "Acela Express door mode switch (2550 visits) Door mode switch on Acela Express trains. The switch is set in the "open" position.
Ben ...")
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Edwards fire alarm pull station
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Interlocking signal at Sheppard-Yonge
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Buckingham Branch track in downtown Staunton [01]
![Buckingham Branch track in downtown Staunton [01]](../../../../i/upload/2024/07/19/20240719164202-0ee0831d-cu_s9999x250.jpg "Buckingham Branch track in downtown Staunton [01] (2966 visits) Track for the Buckingham Branch railroad in downtown Staunton, Virginia, on the bridge that carries ...")
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Buckingham Branch track in downtown Staunton [02]
![Buckingham Branch track in downtown Staunton [02]](../../../../i/upload/2024/07/19/20240719164207-8c61d1c6-cu_s9999x250.jpg "Buckingham Branch track in downtown Staunton [02] (3006 visits) Track for the Buckingham Branch railroad in downtown Staunton, Virginia, just east of the bridge tha...")
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Interlocking outside of Ashburn station
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Manual track switch
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Tower 18 interlocking [01]
![Tower 18 interlocking [01]](../../../../i/upload/2024/11/15/20241115185613-f02c209c-cu_s9999x250.jpg "Tower 18 interlocking [01] (9135 visits) Tower 18 interlocking, a three-quarter union at the northwestern corner of the Loop in the downtown ...")
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Tower 18 interlocking [02]
![Tower 18 interlocking [02]](../../../../i/upload/2024/11/15/20241115185621-7128aab3-cu_s9999x250.jpg "Tower 18 interlocking [02] (1068 visits) Tower 18 interlocking, a three-quarter union at the northwestern corner of the Loop in the downtown ...")
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Tower 18 interlocking [03]
![Tower 18 interlocking [03]](../../../../i/upload/2024/11/15/20241115185626-e65cbb45-cu_s9999x250.jpg "Tower 18 interlocking [03] (2519 visits) Tower 18 interlocking, a three-quarter union at the northwestern corner of the Loop in the downtown ...")
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Tower 18 interlocking [04]
![Tower 18 interlocking [04]](../../../../i/upload/2024/11/15/20241115185634-5eee462c-cu_s9999x250.jpg "Tower 18 interlocking [04] (2487 visits) Tower 18 interlocking, a three-quarter union at the northwestern corner of the Loop in the downtown ...")
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Tower 18 interlocking [05]
![Tower 18 interlocking [05]](../../../../i/upload/2024/11/15/20241115185641-68b75281-cu_s9999x250.jpg "Tower 18 interlocking [05] (2470 visits) Tower 18 interlocking, a three-quarter union at the northwestern corner of the Loop in the downtown ...")
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Tower 18 interlocking [06]
![Tower 18 interlocking [06]](../../../../i/upload/2024/11/15/20241115185651-90db4034-cu_s9999x250.jpg "Tower 18 interlocking [06] (2463 visits) Tower 18 interlocking, a three-quarter union at the northwestern corner of the Loop in the downtown ...")
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Tower 18 interlocking [07]
![Tower 18 interlocking [07]](../../../../i/upload/2024/11/15/20241115185705-7174effa-cu_s9999x250.jpg "Tower 18 interlocking [07] (2439 visits) Tower 18 interlocking, a three-quarter union at the northwestern corner of the Loop in the downtown ...")
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Tower 18 interlocking [08]
![Tower 18 interlocking [08]](../../../../i/upload/2024/11/15/20241115185721-0b59ccae-cu_s9999x250.jpg "Tower 18 interlocking [08] (2522 visits) Tower 18 interlocking, a three-quarter union at the northwestern corner of the Loop in the downtown ...")