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Siren in Highspire, Pennsylvania [01]
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Traffic signal at Ann and South Wood Streets [01]
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Fire alarm at Falls Church Professional Centre [02]
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Siren in Highspire, Pennsylvania [02]
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Traffic signal at Ann and South Wood Streets [02]
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Portable traffic signal on Wago Road
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Fire alarm at 1884 Market House [02]
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Traffic signal in Glen Rock, Pennsylvania [02]
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Traffic signal in Glen Rock, Pennsylvania [01]
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Siren along Church Street [01]
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Siren along Church Street [02]
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Traffic signal at Center Street and Ashley Avenue [01]
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Traffic signal at Center Street and Ashley Avenue [02]
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Traffic signal at Center Street and Ashley Avenue [03]
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Traffic signals at King and Cannon Streets [01]
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Traffic signals at King and Cannon Streets [02]
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Fire alarm horn at 5000 Sunnyside Avenue [01]
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Fire alarm horn at 5000 Sunnyside Avenue [02]
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Fire alarm horn at 5000 Sunnyside Avenue [03]
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Faraday bell at St. Veronica School
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Fire alarm horn/strobe at 5000 Sunnyside Avenue [01]
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Fire alarm horn/strobe at 5000 Sunnyside Avenue [02]
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Railroad crossing at Maiden Lane [03]
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Fire alarm horn at 5000 Sunnyside Avenue [04]
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Railroad crossing at Maiden Lane [02]
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Fire alarm at Shaw-Howard University station [01]
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Railroad crossing at Maiden Lane [01]
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Fire alarm at Shaw-Howard University station [02]
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Fire alarm at Burger King in Southampton, New York [01]
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Railroad tracks between River Road and US 22/322 [01]
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Railroad tracks between River Road and US 22/322 [02]
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Fire alarm horn/strobe at the Hampton Inn in Independence, Ohio
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Fire alarm at Burger King in Southampton, New York [02]
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Fire alarm at Burger King in Southampton, New York [03]
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Kmart in Bridgehampton, New York [45]
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Sirens at Easton Volunteer Fire Department [01]
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Sirens at Easton Volunteer Fire Department [03]
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Sirens at Easton Volunteer Fire Department [02]
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Fire alarm at Best Buy in Gaithersburg, Maryland [02]
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Signal X-238 at East 55th Street station
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Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [04]
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Fire alarm at Best Buy in Gaithersburg, Maryland [01]
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Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [03]
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Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [05]
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Fire alarm horn at Webster Towers
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Route selector box at East 55th Street station
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Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [06]
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Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [02]
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Traffic light at Second and Locust Streets [02]
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Red blinker signal
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Traffic signal at Willoughby and Bridge Streets
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Bicycle signal at intersection of Metcalfe Street and Laurier Avenue West
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Traffic signals in Derwood, Maryland [03]
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Traffic signals over Church Street and Commercial Avenue
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Traffic light at Wellington and O'Connor Streets [01]
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Traffic light at Second and Locust Streets [01]
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Traffic light at Wellington and O'Connor Streets [02]
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Traffic signal on 7th Street SW
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Traffic signals in Derwood, Maryland [01]
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Traffic signals on Nicholson Lane [02]
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Interlocking signal at Sheppard-Yonge
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Traffic light at Third and Walnut Streets
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Rail crossing at South Maple Avenue [02]
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Traffic signal at Boerum Place and Livingston Street [02]
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Traffic signal at Lexington Avenue and East 41st Street
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Edwards chime
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Traffic light at Rideau and Nelson Streets [01]
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Traffic signal at 4th and West Street
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Traffic signals at Clinch Avenue and Henley Street
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Rail crossing at South Maple Avenue [04]
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Traffic signal at Boerum Place and Livingston Street [01]
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Traffic signal at intersection of Metcalfe Street and Laurier Avenue West [02]
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Vintage US&S railroad signals [03]
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Traffic signal at Boerum Place and Livingston Street [03]
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Interlocking signal at Anacostia station
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Rail crossing at South Maple Avenue [01]
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Pedestrian signal at 15th and P Streets NW
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"Darth Vader" railroad signals
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Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [01]
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Rail crossing at South Maple Avenue [05]