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Rosslyn tunnel portal
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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] (3163 visits) D Route pocket track on the Washington Metro system, showing the interlockings and the signal. This ...")
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Simulated fire alarm
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Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [01]
![Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [01]](../../../../i/upload/2024/07/19/20240719123304-52d5c28f-cu_s9999x250.jpg "Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [01] (1949 visits) Traffic light gantry over the intersection of Fairfax County Parkway and Sunrise Valley Drive in Res...")
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Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [02]
![Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [02]](../../../../i/upload/2024/07/19/20240719123309-f3f6006f-cu_s9999x250.jpg "Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [02] (1517 visits) Traffic light gantry over the intersection of Fairfax County Parkway and Sunrise Valley Drive in Res...")
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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] (1356 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] (8268 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] (1504 visits) Traffic signal at the intersection of Columbus Avenue and Metro Access Road in Derwood, Maryland. A...")
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Signal FT8 at 15th Street station
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Route selector box at East 55th Street station
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Signal X-238 at East 55th Street station
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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] (660 visits) CSX locomotive 2783 leads a freight train as it passes the railroad grade crossing at Maiden Lane in...")