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  2. Griswold Signal Company - Wikipedia

    en.wikipedia.org/wiki/Griswold_Signal_Company

    An approaching train would trigger not just the requisite red flashing lights and bells, but a mechanism that rotated a yellow stop sign ninety degrees to face traffic as well. (The signs eventually changed to red). [3] This type of signal was relatively common throughout the Midwestern United States, where state regulators required use of the ...

  3. Traffic light - Wikipedia

    en.wikipedia.org/wiki/Traffic_light

    An LED 50-watt traffic light in Portsmouth, United Kingdom. Traffic lights, traffic signals, or stoplights – also known as robots in South Africa, [1] [2] Zambia, and Namibia – are signaling devices positioned at road intersections, pedestrian crossings, and other locations in order to control the flow of traffic. [3]

  4. Traffic signal preemption - Wikipedia

    en.wikipedia.org/wiki/Traffic_signal_preemption

    Traffic signal preemption (also called traffic signal prioritisation) is a system that allows an operator to override the normal operation of traffic lights.The most common use of these systems manipulates traffic signals in the path of an emergency vehicle, halting conflicting traffic and allowing the emergency vehicle right-of-way, thereby reducing response times and enhancing traffic safety.

  5. Variations in traffic light operation - Wikipedia

    en.wikipedia.org/wiki/Variations_in_traffic...

    Some traffic lights in Pennsylvania illuminate the yellow light a few seconds before the green light turns off, to give this same warning, [citation needed] as did some lights in the Los Angeles area until at least the late 1970s, and one light in Glendale, AZ at 56th Avenue &Glenn until it was replaced in the early 1980s. Traffic lights in ...

  6. History of traffic lights - Wikipedia

    en.wikipedia.org/wiki/History_of_traffic_lights

    An early two-light traffic signal by White Horse Tavern in Hudson Street, New York. Image taken in 1961. Despite the failure of the world's first traffic light in London in 1869, countries all around the world still made traffic lights. By 1880, traffic lights spread all over the world, and it has always been like that, since then.

  7. Minnesota State Highway 62 (Hennepin–Dakota counties)

    en.wikipedia.org/wiki/Minnesota_State_Highway_62...

    Minnesota State Highway 62 (MN 62) is a highway in the Twin Cities region of Minnesota. The route was part of County Road 62 (CR 62) until 1988, when a portion of the route was inherited by the state. The western terminus of the highway is at Interstate 494 (I-494) in Eden Prairie, where the roadway continues west as CR 62 to CR 101.

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Split Rock Lighthouse - Wikipedia

    en.wikipedia.org/wiki/Split_Rock_Lighthouse

    The light was retired in 1969 by the U.S. Coast Guard. The lighthouse is now part of the Split Rock Lighthouse State Park and is operated by the Minnesota Historical Society. The site includes the original tower and lens, the fog signal building, the oil house, and the three keepers' houses. It is restored to appear as it did in the late 1920s.