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Faraday bell at St. Veronica School
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Railroad crossing at Maiden Lane [01]
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Railroad crossing at Maiden Lane [03]
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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 at Shaw-Howard University station [01]
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Railroad crossing at Maiden Lane [02]
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Fire alarm horn at 5000 Sunnyside Avenue [03]
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Fire alarm horn at 5000 Sunnyside Avenue [04]
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Fire alarm at Shaw-Howard University station [02]
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Federal Signal 450D horn with VAL strobe [01]
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Rockville Bridge [01]
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Rockville Bridge [03]
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Federal Signal 450D horn with VAL strobe [02]
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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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One way sign at Bank and Sparks Streets
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CTA signal A59 at Jackson station [02]
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Fire alarm horn/strobe at the Hampton Inn in Independence, Ohio
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Sirens at Easton Volunteer Fire Department [03]
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Sirens at Easton Volunteer Fire Department [01]
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Fire alarm at Sherman Garden Apartments [01]
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Sirens at Easton Volunteer Fire Department [02]
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CTA signal A59 at Jackson station [01]
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Signal X-238 at East 55th Street station
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Traffic signals on Nicholson Lane [01]
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Upper level exhibit space at Nauticus
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Traffic signals on Nicholson Lane [02]
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Traffic signals in Derwood, Maryland [01]
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Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [04]
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Traffic signals on Nicholson Lane [03]
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Pedestrian signal call sensor at Metcalfe and Nepean Streets [02]
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Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [03]
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Traffic signals on Nicholson Lane [04]
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Traffic signals on Nicholson Lane [05]
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Pedestrian signal call sensor at Metcalfe and Nepean Streets [01]
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Route selector box at East 55th Street station
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Traffic signals on Nicholson Lane [06]
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Traffic signals at US 15 and Lucketts Road [02]
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Traffic light gantry at Fairfax County Parkway and Sunrise Valley Drive [05]
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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 signals at US 15 and Lucketts Road [01]
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Graffiti on traffic signal control box in Gatineau
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Traffic signals in Derwood, Maryland [03]
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Traffic light at Wellington and O'Connor Streets [01]
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Wheelock fire alarm bell
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Traffic signal at intersection of Metcalfe Street and Laurier Avenue West [02]
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Fire alarm horn/strobe at New Street parking garage [01]
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Fire alarm horn at Webster Towers
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Traffic signal at Willoughby and Bridge Streets
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Fire alarm horn/strobe at New Street parking garage [02]
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Bicycle signal at intersection of Metcalfe Street and Laurier Avenue West
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Traffic light at Wellington and O'Connor Streets [02]
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Traffic signal at Lexington Avenue and East 41st Street
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Pedestrian signal at 15th and P Streets NW
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Signage on a mast arm at Willoughby and Jay Streets
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Traffic light at Second and Locust Streets [02]
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Traffic signals over Church Street and Commercial Avenue
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Fire alarm at Best Buy in Gaithersburg, Maryland [02]
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Wheelock 7002T at Habitat ReStore
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Wheelock 7002T with double projector device
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Railroad crossing at Williams Road [01]
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Traffic light at Second and Locust Streets [01]
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Traffic signal at Boerum Place and Livingston Street [03]
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Fire alarm at Best Buy in Gaithersburg, Maryland [01]
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Traffic signal at Sansom and Broad Streets
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Traffic light at Rideau and Nelson Streets [01]
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Traffic light at Third and Walnut Streets
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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 [03]
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Traffic signal at Boerum Place and Livingston Street [02]
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Traffic light at 7th Avenue and West 26th Street [02]
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Traffic signal at Boulevard Maloney and Boulevard de la Cité [02]
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Traffic light at 7th Avenue and West 24th Street
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Traffic signals at Clinch Avenue and Henley Street
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Traffic signal at Boulevard Maloney and Boulevard de la Cité [01]
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Traffic signal at 4th and West Street
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Rail crossing at South Maple Avenue [02]
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Horizontally-mounted traffic light in Atlantic City [04]