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  2. Road signs in the United States - Wikipedia

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

    End school zone (usually under an R2 speed limit sign) S5-3 End school speed limit. Warning signs. W1 series: Horizontal alignment. W1-1R Turn (right) W1-1L

  3. 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 ...

  4. Speed limits in the United States - Wikipedia

    en.wikipedia.org/wiki/Speed_limits_in_the_United...

    Prior to 2009, a speed limit could be defined in kilometers per hour (km/h) as well as miles per hour (mph). The 2003 version of the MUTCD stated that "speed limits shown shall be in multiples of 10 km/h or 5 mph." [118] If a speed limit sign indicated km/h, the number was circumscribed and "km/h" was written below. Prior to 2003, metric speed ...

  5. Interstate Highway standards - Wikipedia

    en.wikipedia.org/wiki/Interstate_Highway_standards

    Minimum design speed: A minimum design speed of 70 mph (113 km/h) is to be used, except in mountainous and urban areas, where the minimum is 50 mph (80 km/h). [ 4 ] The sight distance , curvature and superelevation of the highway should follow the current edition of AASHTO's A Policy on Geometric Design of Highways and Streets for the chosen ...

  6. When do speed limit signs take effect? Here’s the ... - AOL

    www.aol.com/speed-limit-signs-effect-simple...

    Make “follows the speed limit” one of the good things you do for the world. ... Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Mail.

  7. California Manual on Uniform Traffic Control Devices - Wikipedia

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

    In California, guide signs are laid out horizontally with a consistent height. Pull-through signs are used instead of diagrammatic signs. [7] The CA MUTCD and sign specifications are organized similarly to the MUTCD and SHSM, respectively.

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