There are four kinds of safety signs. they are

Safety signs are divided into four categories, namely: prohibition signs, warning signs, indication signs and prompt signs.

1, the prohibition sign means to prohibit or stop certain behaviors of people.

The warning sign means to warn people of possible dangers.

3. The indication sign means that it must be observed.

4. The meaning of the prompt sign is to indicate the direction of the target.

Extended data:

1, safety signs should be set in obvious places related to safety, and ensure that people have enough time to pay attention to what they represent. When safety signs are placed on walls or other existing structures, the background color should be in contrast with the main color on the signs.

2. Safety signs are signs set for safety reasons to reduce potential safety hazards. These signs can be seen at the gate outside the factory, inside the factory and on the road. The safety signs required by the transportation department are divided into prohibition signs and attention to obstacles signs.

3. Accident-prone road signs (accident-prone road sections) are used to announce that the road ahead is an accident-prone road section, so you must drive carefully. This sign is located in an appropriate position in front of traffic-prone sections.

4. No straight and right turn signs (No straight and right turn) indicate that all vehicles are prohibited from going straight and turning right at the intersection ahead. This sign is located in an appropriate position in front of the intersection where straight and right turns are prohibited.

References:

Baidu Encyclopedia _ Safety Sign? Baidu Encyclopedia _ Safety Signs