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  2. Manual on Uniform Traffic Control Devices - Wikipedia

    en.wikipedia.org/wiki/Manual_on_Uniform_Traffic...

    The Manual on Uniform Traffic Control Devices for Streets and Highways (usually referred to as the Manual on Uniform Traffic Control Devices, abbreviated MUTCD) is a document issued by the Federal Highway Administration (FHWA) of the United States Department of Transportation (USDOT) to specify the standards by which traffic signs, road surface markings, and signals are designed, installed ...

  3. Variations in traffic light operation - Wikipedia

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

    A common way of warning that an obscured traffic light ahead is red is a red-signal-ahead sign. It is shaped like a standard yellow diamond shape sign with LEDs spelling out "Signal Ahead". Just before the traffic light goes yellow, the word "Red" will light up above Signal Ahead and they will begin to flash alternately.

  4. California Manual on Uniform Traffic Control Devices

    en.wikipedia.org/wiki/California_Manual_on...

    In 2000, Caltrans and the California Traffic Control Devices Committee undertook an effort to reconcile the Traffic Manual with the national MUTCD. In 2004, these efforts resulted in the adoption of the 2003 edition of the national MUTCD along with a California supplement, [ 2 ] which replaced various chapters of the 1996 Traffic Manual ...

  5. Rules of the Road: Even when you’re making a right turn, a ...

    www.aol.com/rules-road-even-making-turn...

    A: The Manual of Uniform Traffic Control Devices (MUTCD), the official guide book for traffic road signs, markings, and signals, devotes 70 pages to traffic control signals and how they’re ...

  6. File:MUTCD W3-3.svg - Wikipedia

    en.wikipedia.org/wiki/File:Signal_Ahead_symbol...

    English: Sign W3-3 “Signal Ahead” from the Manual of Uniform Traffic Control Devices. 750 mm by 750 mm (30 in by 30 in), made to the specifications of the 2004 edition of Standard Highway Signs (sign W3-3).

  7. Comparison of MUTCD-influenced traffic signs - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_MUTCD...

    Prohibitory and restrictive signs are classified as regulatory signs, as per the MUTCD. Almost all prohibitory signs use a red circle with a slash. Restrictive signs typically use a red circle, as in Europe. Some may be seated on a rectangular white background. The original MUTCD prohibitory and restrictive signs were text-only (i.e. NO LEFT ...

  8. Road signs in the United States - Wikipedia

    en.wikipedia.org/wiki/Road_signs_in_the_United...

    11th edition of the MUTCD, published December 2023. In the United States, road signs are, for the most part, standardized by federal regulations, most notably in the Manual on Uniform Traffic Control Devices (MUTCD) and its companion volume the Standard Highway Signs (SHS).

  9. Traffic warning sign - Wikipedia

    en.wikipedia.org/wiki/Traffic_warning_sign

    Vienna Convention traffic signal ahead (white triangle) These warning signs indicate that traffic lights are ahead, and are often used when it is difficult to see that a traffic light may already be showing red, to warn a driver to prepare to slow down. They may be supplemented with flashing light or lighted sign when light is red or turning red.

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