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Flaggers are the second line of attention (after the warning signs) for drivers. They are the first people in the work zone to deal with opposing traffic. While construction traffic control in the U.S. used to be a widely unionized profession, it is now dominated by private business and wages are not controlled by the union.
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).
Nearly all MUTCD-influenced warning signs are diamond-shaped and yellow; some warning signs may be fluorescent yellow-green to draw extra attention. There are a few exceptions to this: Pentagonal signs are used in school zones in the United States, Liberia, Mexico, Malaysia and many areas in Canada.
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 ...
Some other countries, like Argentina and Taiwan, use a combination of triangle and diamond-shaped warning signs. The warning signs usually contain a symbol. In Europe they are based on the UNECE Vienna Convention on Road Signs and Signals. In the United States they are based on the MUTCD standard and often contain text only.
Slow Traffic - The signage a driver and/or pedestrian experiences before entering a work zone in the advanced warning area can influence their movement through the work zone.
Apr. 15—AUSTIN — Have you ever felt the blast of air from traffic on the side of a highway? The ceaseless noise, staggering winds and two-ton vehicles speeding just feet away can be terrifying ...
Temporary traffic control (construction or work zone) signs; School signs; Railroad and light rail signs; Bicycle signs; In the United States, the categories, placement, and graphic standards for traffic signs and pavement markings are legally defined in the Federal Highway Administration's Manual on Uniform Traffic Control Devices as the standard.
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