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Rosslyn tunnel portal
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Greenbelt interlocking
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College Park interlocking [01]
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College Park interlocking [02]
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CSX Capital Subdivision tracks
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Interlocking signal at Anacostia station
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Traffic lights outside Greensboro station
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Halethorpe MARC station [01]
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Halethorpe MARC station [02]
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Interlocking signal at Sheppard-Yonge
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Interlocking signal at 72nd Street on the Second Avenue Subway
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Siren at Jefferson Volunteer Fire Company [01]
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Siren at Jefferson Volunteer Fire Company [02]
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Federal Signal Model 2 siren at Verona Fire Department [03]
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Federal Signal Model 2 siren at Verona Fire Department [02]
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Federal Signal Model 2 siren at Verona Fire Department [01]
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Siren at Waynesboro Fire Department [01]
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Siren at Waynesboro Fire Department [04]
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Siren at Waynesboro Fire Department [03]
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Siren at Waynesboro Fire Department [02]
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Siren at Warrenton Volunteer Fire Company
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Federal Signal Model 5 siren in Lucketts, Virginia [01]
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Federal Signal Model 5 siren in Lucketts, Virginia [02]
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Siren at Fairfield Fire & EMS [01]
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Siren at Fairfield Fire & EMS [02]
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Sirens at Gaithersburg Fire Museum
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Belfast Fire Department siren [01]
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Belfast Fire Department siren [02]
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Siren at El-Roy Volunteer Fire Department
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Siren at Wyse Fork Volunteer Fire Department
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Water tower with siren in Emporia, Virginia [01]
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Water tower with siren in Emporia, Virginia [02]
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Water tower with siren in Emporia, Virginia [03]
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Signal governing exit to siding in White Sulphur Springs
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Federal Signal SD-10 at Cumberland Valley Hose Company
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Buc-ee's in Crossville, Tennessee [39]
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Siren selfie
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Fire alarm at Trenton Park & Ride [02]
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Fire alarm at Trenton Park & Ride [01]
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Fire alarm strobe at Fulton Street station
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Red Wheelock RSS strobe at New York Transit Museum
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Court Street interlocking board
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Signal FT8 at 15th Street station
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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]
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CTA signal A59 at Jackson station [02]
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Signal X-238 at East 55th Street station
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Route selector box at East 55th Street station
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Federal Signal STH-10A at Quinton Fire Company [01]
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Federal Signal STH-10A at Quinton Fire Company [02]
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American Signal Corporation Tempest-112 at Quinton Fire Company [01]
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American Signal Corporation Tempest-112 at Quinton Fire Company [02]
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Sirens at Easton Volunteer Fire Department [01]
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Sirens at Easton Volunteer Fire Department [02]
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Sirens at Easton Volunteer Fire Department [03]
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Fire alarm at Shaw-Howard University station [01]
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Fire alarm at Shaw-Howard University station [02]