The correct name of the warning triangle should be the warning triangle. The car warning triangle is a passive reflector made of plastic reflective material. When the driver encounters a sudden breakdown on the road for maintenance or an accident, use the triangle warning The reflective performance of the plate can remind other vehicles to take care to avoid secondary accidents.
Generally speaking, when a driver discovers that a warning triangle appears in front of him, he needs to go through a process of discovering, clearly visible the warning signal ahead, taking measures to brake, slowing down, and avoiding. Take a car traveling at a speed of 100 kilometers per hour as an example. Generally speaking, a reaction time of at least 10.8 seconds or a distance of at least 350 meters is required. This requires the warning triangle to be highly reflective so that the driver can see it for the first time.
On general roads, drivers should set up warning signs 50 meters away from the direction of the vehicle; on highways, they should set up warning signs 100 meters away; pay special attention to some special situations, such as rainy days or corners, be sure to Place warning signs 150 meters away, so that vehicles behind you can find them early. It is especially important to place warning signs when a vehicle is involved at night.