How many meters away from the broken-down vehicle should the warning sign be placed on the highway?

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On the highway, the warning sign for a broken-down vehicle should be placed at least 150 meters away from the vehicle in the direction of oncoming traffic. Introduction to safety warning signs: The warning sign is a standard emergency equipment on vehicles, usually in the shape of a triangle, hence also known as a triangular warning sign. The warning sign must strictly comply with the requirements of the "Road Traffic Safety Law" and be made of plastic reflective material as a passive reflector. The principle is that when a driver encounters a sudden traffic accident on the road, the reflective properties of the warning sign are used to alert other vehicles to avoid it, thereby preventing secondary accidents. The function of the safety warning sign: Generally, the triangular warning sign on the highway indicates that there is a vehicle breakdown or a traffic accident ahead, serving as a signal to remind following vehicles to slow down.