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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).
As a result, in Western Europe the traffic signs are well standardized, although there are still some country-specific exceptions, mostly dating from the pre-1968 era. The principle of the European traffic sign standard is that certain shapes and colours are to be used with consistent meanings:
Traffic signs or road signs are signs erected at the side of or above roads to give instructions or provide information to road users. The earliest signs were simple wooden or stone milestones . Later, signs with directional arms were introduced, for example the fingerposts in the United Kingdom and their wooden counterparts in Saxony .
Traffic sign design involves any tasks in the process of designing traffic signage. Traffic signs may provide information about the law, warn about dangerous conditions and guide roadway users. Traffic signs vary depending upon their use, using different symbols, colors and shapes for easy identification.
Symbol marking, mark that contain certain meanings to express warnings, orders and prohibitions to complement or confirm the intent conveyed by traffic signs or other traffic signs. The colors also represent the use, they are: White for line; Yellow for line (National road) Red for Bus-way and School zone; Green for Bicycle
Sometimes similar signs have minor differences in meanings, following the local traffic codes. For example, the Irish "rural speed limit" sign for local tertiary roads takes the appearance of that used to denote the end of all previously signed restrictions used elsewhere in Europe. However this sign, which is always accompanied with a "SLOW ...
The major disadvantage of this system of traffic light is that it is unfamiliar to those who are used to seeing specific colours of the traffic lights at the various ends of a normal traffic light itself (e.g. green rightmost, red leftmost, etc.) as well is being problematic for the color blind (although by Chinese traffic laws, people who are ...
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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