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Rosslyn tunnel portal
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Metro D Route pocket track [02]
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"Darth Vader" railroad signals
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Directional signage at the end of the ramp for Interstate 64, Exit 99 at Rockfish Gap
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Traffic signals in Philadelphia
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Pedestrian signal at 15th and P Streets NW
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Storm clouds at Georgia Avenue and Norbeck Road
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Traffic signal on 7th Street SW
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7th Street and Independence Avenue SW
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Wheelock fire alarm bell
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Wheelock 7002T at Habitat ReStore
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Thunderbolt siren in Jessup Park [08]
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Thunderbolt siren in Jessup Park [07]
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Thunderbolt siren in Jessup Park [06]
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Thunderbolt siren in Jessup Park [05]
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Thunderbolt siren in Jessup Park [04]
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Thunderbolt siren in Jessup Park [03]
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Thunderbolt siren in Jessup Park [02]
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Thunderbolt siren in Jessup Park [01]
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Wheelock 7002T with double projector device
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Traffic and pedestrian signals at East Johnson Street and South New Street
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Fire alarm horn/strobe at New Street parking garage [01]
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Fire alarm horn/strobe at New Street parking garage [02]
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Vintage US&S railroad signals [07]
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Vintage US&S railroad signals [08]
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Vintage US&S railroad signals [09]
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Norfolk Southern track through Stuarts Draft, Virginia [01]
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Norfolk Southern track through Stuarts Draft, Virginia [02]
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Norfolk Southern track through Stuarts Draft, Virginia [03]
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Norfolk Southern track through Stuarts Draft, Virginia [04]
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Switch at west end of siding in Stuarts Draft, Virginia
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Signal FT8 at 15th Street station
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Traffic signal at Boulevard de la Cité and Boulevard de la Gappe [06]
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Traffic signal at Boulevard de la Cité and Boulevard de la Gappe [05]
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Traffic signal at Boulevard de la Cité and Boulevard de la Gappe [01]
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Traffic signal at Boulevard de la Cité and Boulevard de la Gappe [03]
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Traffic signal at Boulevard de la Cité and Boulevard de la Gappe [02]
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Graffiti on traffic signal control box in Gatineau
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Traffic signal at Boulevard Maloney and Boulevard de la Cité [01]
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Traffic signal at Boulevard de la Cité and Boulevard de la Gappe [04]
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Traffic signal at Boulevard de la Cité and Boulevard de la Gappe [07]
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Traffic signal at Boulevard Maloney and Boulevard de la Cité [02]
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Traffic signal at Boulevard Maloney and Boulevard de la Cité [03]
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Traffic signal at Boulevard Maloney and Boulevard de la Cité [04]
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Traffic signal at Boulevard Maloney and Boulevard de la Cité [05]
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Traffic signal at Boulevard Maloney and Boulevard de la Cité [06]
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Intersection of Boulevard Maloney and Boulevard de la Cité [01]
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Intersection of Boulevard Maloney and Boulevard de la Cité [02]
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Intersection of Boulevard Maloney and Boulevard de la Cité [03]
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Traffic light at Rideau and Nelson Streets [01]
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Traffic light at Rideau and Nelson Streets [02]
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One way sign at Bank and Sparks Streets
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Traffic signal at intersection of Metcalfe Street and Laurier Avenue West [02]
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Pedestrian signal call sensor at Metcalfe and Nepean Streets [01]
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Sign for Wellington Street
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Traffic light at Wellington and O'Connor Streets [02]
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Traffic light at Wellington and O'Connor Streets [01]
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Pedestrian signal call sensor at Metcalfe and Nepean Streets [02]
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Montreal Road eastbound from North River Road
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Traffic signal at Elgin and Somerset Streets [04]
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Traffic signal at Elgin and Somerset Streets [02]
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Traffic signal at Elgin and Somerset Streets [05]
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Traffic signal at intersection of Metcalfe Street and Laurier Avenue West [01]
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Traffic signal at Elgin and Somerset Streets [01]
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Traffic signal at Elgin and Somerset Streets [03]
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Bicycle signal at intersection of Metcalfe Street and Laurier Avenue West
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Traffic light at Montreal Road and North River Road
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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]