The triangle warning sign is made of Canada MBM high-strength reflective mold core, imported reflective materials and fluorescent materials. When the driver for maintenance or has an accident on the road, the retro reflective performance of the triangle warning board can remind other vehicles to avoid the occurrence of secondary accidents.

The standard of triangle warning board is GB 19151-2003 triangle warning board for motor vehicles. This standard specifies the technical requirements, test methods and inspection rules of triangle warning signs.

Generally speaking, the driver needs to go through a process of discovering, clearly seeing the front warning signal, taking measures to brake, decelerating and avoiding.

On general roads, drivers should set up warning signs 50 meters away from the direction of coming vehicles; on high-speed roads, warning signs should be set up 100 meters away; special attention should be paid to some special situations, for example, in rainy days or at corners, warning signs must be placed 150 meters away, so as to let the rear vehicles find out as soon as possible. In case of vehicle accidents at night, it is particularly important to place warning signs.