Traffic Warning Triangle

Generally speaking, the driver needs to go through a process of finding, clearly seeing the warning signal ahead, taking measures to brake, slow down and avoid when he finds the triangle warning sign in front of him.  Taking a car going 100 km/h as an example, it normally requires a reaction time of at least 10.8 seconds or a distance of at least 350 meters.  This requires the triangle to be highly reflective so that the driver can see it first.  

On general roads, drivers should set up warning signs 50 meters away from the direction of the coming vehicle;  Warning signs should be set up 100 meters away on highways;  Pay special attention to some special circumstances, for example, rainy days or in the corner, must be placed in 150 meters away from the warning board, so as to let the rear vehicles as soon as possible to find, at night when the vehicle accident, put warning board is particularly important.