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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 .
The MUTCD's W24 series of signs is for warning signs relating to lane shifts, where traffic is diverted slightly toward the left or right of the roadway, but the route is otherwise unchanged. These signs typically have orange background and are used for temporary situations.
In the United States, the stop sign is not intended as a traffic calming device, [6] but is meant to be installed mainly for safety or to assign right-of-way. Stop signs may be erected on all intersecting roads, resulting in an all-way stop. [6] Some research has concluded that stop signs do not offer measurable safety benefits over the Yield ...
If traffic signals do not control a four-way intersection, signs or other features are typically used to control movements and make clear priorities. The most common arrangement is to indicate that one road has priority over the other, but there are complex cases where all traffic approaching an intersection must yield and may be required to stop.
The No Entry / Do Not Enter sign may or may not feature text. In Ireland, an upwards-pointing arrow contained within a slashed red circle is used instead. Some countries have those two signs separated. The Latin American-style do not proceed straight sign may take a different meaning in countries with standard No Entry signs.
Observing and interpreting traffic signs (especially warning, priority or prohibitory traffic signs) Keeping to right side (or left side) except to pass others, where passing is allowed. Direction of travel and turning (one way, do not enter, no U-turn, etc.) Speed, height, width and weight limits. Bicycle and pedestrian priority.
The Latin American-style 'do not proceed straight' sign may take a different meaning in countries with standard No Entry / Do Not Enter signs. Typically, it indicates an intersection where traffic cannot continue straight ahead (often involving a one-way street to be exact), but where cross-traffic may enter the street from the right (or left).
Under the Vienna Convention the begin and end built-up area signs imply a change between built-up area and rural traffic rules including speed limit. In many European countries the dark background with light coloured text version of the sign is intended for information only. [ 14 ]
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