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Rosslyn tunnel portal
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Metro and CSX tracks in Northeast DC
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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] (2379 visits) D Route pocket track on the Washington Metro system, showing the interlockings and the signal. This ...")
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Greenbelt interlocking
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College Park interlocking [01]
![College Park interlocking [01]](../../i/upload/2024/07/15/20240715141119-0c23af03-cu_s9999x250.jpg "College Park interlocking [01] (1869 visits) Interlocking south of the College Park-University of Maryland station, on the Green Line of the Wash...")
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College Park interlocking [02]
![College Park interlocking [02]](../../i/upload/2024/07/15/20240715141123-5fa6adc8-cu_s9999x250.jpg "College Park interlocking [02] (2613 visits) Interlocking south of the College Park-University of Maryland station, on the Green Line of the Wash...")
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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] (2669 visits) D Route pocket track on the Washington Metro system, showing the interlockings and the signal. This ...")
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Interlocking signal at Anacostia station
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Silver Spring pocket track
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Largo Town Center interlocking
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Signal at Branch Avenue rail yard
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Traffic lights outside Greensboro station
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Traffic signals in Derwood, Maryland [01]
![Traffic signals in Derwood, Maryland [01]](../../i/upload/2024/07/20/20240720101908-de0aad1a-cu_s9999x250.jpg "Traffic signals in Derwood, Maryland [01] (1123 visits) Traffic signal at the intersection of Columbus Avenue and Metro Access Road in Derwood, Maryland. A...")
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Traffic signals in Derwood, Maryland [02]
![Traffic signals in Derwood, Maryland [02]](../../i/upload/2024/07/20/20240720101912-698b18e1-cu_s9999x250.jpg "Traffic signals in Derwood, Maryland [02] (7972 visits) Traffic signals at the intersection of Columbus Avenue and Metro Access Road in Derwood, Maryland. ...")
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Traffic signals in Derwood, Maryland [03]
![Traffic signals in Derwood, Maryland [03]](../../i/upload/2024/07/20/20240720101918-d2aa492d-cu_s9999x250.jpg "Traffic signals in Derwood, Maryland [03] (1268 visits) Traffic signal at the intersection of Columbus Avenue and Metro Access Road in Derwood, Maryland. A...")
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View west from Roosevelt platform
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View east from Roosevelt platform
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CTA signal A59 at Jackson station [01]
![CTA signal A59 at Jackson station [01]](../../i/upload/2024/11/13/20241113234023-75426ee0-cu_s9999x250.jpg "CTA signal A59 at Jackson station [01] (876 visits) Signal A59 shows a green aspect at Jackson, a station on the CTA Red Line in Chicago, Illinois.
Mor...")
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CTA signal A59 at Jackson station [02]
![CTA signal A59 at Jackson station [02]](../../i/upload/2024/11/13/20241113234044-b800d5a0-cu_s9999x250.jpg "CTA signal A59 at Jackson station [02] (771 visits) Signal A59 shows a green aspect at Jackson, a station on the CTA Red Line in Chicago, Illinois.
Mor...")
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Fire alarm at Shaw-Howard University station [01]
![Fire alarm at Shaw-Howard University station [01]](../../i/upload/2025/03/05/20250305020353-34574f7a-cu_s9999x250.jpg "Fire alarm at Shaw-Howard University station [01] (283 visits) Wheelock 34T fire alarm horn in in a back corridor at the Shaw-Howard University Metro station in Wa...")
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Fire alarm at Shaw-Howard University station [02]
![Fire alarm at Shaw-Howard University station [02]](../../i/upload/2025/03/05/20250305020401-ed656974-cu_s9999x250.jpg "Fire alarm at Shaw-Howard University station [02] (305 visits) Wheelock 34T fire alarm horn in in a back corridor at the Shaw-Howard University Metro station in Wa...")