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  2. Automotive lighting - Wikipedia

    en.wikipedia.org/wiki/Automotive_lighting

    End outline marker light. UN Regulation 48 requires vehicles exceeding 2.10 metres (83 in) in width to be equipped with white front and red rear end-outline marker lights on both the left and right, [23] which, like North American identification lights, are intended to indicate a vehicle's overall width and height. The front clearance lights ...

  3. North American railroad signals - Wikipedia

    en.wikipedia.org/wiki/North_American_railroad...

    Position light signals use rows of 5 + 3 ⁄ 8-inch-diameter (140 mm) lamps to simulate the positions of an upper quadrant semaphore blade. Position lights were developed by A.H. Rudd, Superintendent of Signalling of the Pennsylvania Railroad (PRR).

  4. Emergency vehicle lighting - Wikipedia

    en.wikipedia.org/wiki/Emergency_vehicle_lighting

    Tow trucks are required to be equipped with amber lights but such lights may be operated only 48 inch LED rooftop emergency strobe warning lights bar w/adjustable mounting brackets-white amber lighting except for four amber/white LED's mounted in the grill and turn signal light side view mirror LEDs.

  5. Raised pavement marker - Wikipedia

    en.wikipedia.org/wiki/Raised_pavement_marker

    The orange markers separate opposing traffic lanes. The blue marker denotes a fire hydrant on the left sidewalk. A raised pavement marker is a safety device used on roads. These devices are usually made with plastic, ceramic, thermoplastic paint, glass or occasionally metal, and come in a variety of shapes and colors.

  6. Marker beacon - Wikipedia

    en.wikipedia.org/wiki/Marker_beacon

    A back course marker (BC) normally indicates the ILS back-course final-approach fix where approach descent is commenced. It is identified by pairs of Morse-code "dots" at 3000 Hz (95 pairs per minute), which will trigger the white light on a marker beacon indicator, but with a different audio rhythm from an inner marker or en-route marker. [5]

  7. Variations in traffic light operation - Wikipedia

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

    In New Zealand, where they drive on the left, when a road is given a green light from an all direction stop, a red arrow can continue to display to turning traffic, holding traffic back while the pedestrian crossing on the side road is given a green signal (for left turns) or while oncoming traffic goes straight ahead and there is no permissive right turn allowed (for right turns).

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