If there are enough reflective cones, they should be placed in a triangular shape, starting 150 meters behind the accident vehicle. In the case of two lanes, the vehicle in the accident will start from whichever lane it is. From the edge (including the emergency lane) to the accident vehicle, they are placed in a radial line (also a triangular line). In the case of three lanes, if the accident car is in the middle lane, it is placed starting from the emergency lane on the right, closing both lanes!