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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.
European traffic signs have been designed with the principles of heraldry in mind; [citation needed] i.e., the sign must be clear and able to be resolved at a glance. Most traffic signs conform to heraldic tincture rules, and use symbols rather than written texts for better semiotic clarity.
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).
A direction sign, more fully defined as a direction, position, or indication sign by the Vienna Convention on Road Signs and Signals, is any road sign used primarily to give information about the location of either the driver or possible destinations, and are considered a subset of the informative signs group. Direction signs are far more ...
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 TURN). [14] Some of these signs continue to be used in the US.
Polish road signs depict people with stylized (as opposed to naturalistic) silhouettes. Meaning of the traffic signals and their usage is described in another regulation. Traffic signals are placed on the right side of the road, on the left side or over the carriageway. There are three types of traffic signals: signals made by traffic lights
French sign showing the difference between French and Swiss motorway sign colours, on the A411 near Geneva. The main differences relate to Graphic design details; Local regulatory significance; The colour-coding of directional signs; Local language texts (sometimes bilingual) The meaning and colour-coding of horizontal road surface markings