Traffic Signs Classifications
1. Traffic signs can be mainly classified as main signs and auxiliary signs.
Main signs are divided into:
a. Indication signs: indicate how people get to ways and places they want to. Such as straight way, turn left, turn right, one-way traffic, pedestrian street, etc.
b. Warning signs: warn the drivers about dangers in front of the road and measures to be taken, such as intersection, sharp turning, railway crossing, slippery road, uneven road, dangerous hillside road and the like;
c. Prohibitory signs: they are usually circular and used for prohibitions in order to ensure the traffic safety and smoothness. Like no entry, no parking, speed limits and others;
d. Guide signs: used to guide the direction, location, distance, highway entrances and exits, service areas, and other famous places.
Auxiliary signs are attached to the main signs for assistant and explanation. It includes: car types, times, area and distance, and warnings. The auxiliary signs can’t be individually set separately.
2. According to layout, the road traffic signs can be divided into the following three categories:
a. Longitudinal signs: set along the road direction.
b. Transverse signs: have certain angles with road direction.
c. Other signs: character tags or other forms of markings.
3. According to their forms, the traffic signs can be divided into the following four categories:
a. Lines: lines or imaginary lines drawn on the pavement or curbs of the roads.
b. Character signs: texts, numbers, and other shapes drawn on the road surface.
c. Protruding signs: installed on the road to show the road boundaries, edges, merging point, corners, dangerous section, width change or barriers.
d. Roadside border signs: installed on both sides of the road to indicate road direction and border, they are usually light reflecting columns or light reflecting sheets.
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