Learning the topic of "Driving a Motor Vehicle" in the Power Quadruple Race: When a motor vehicle breaks down on the expressway, a warning sign should be set outside the direction of the faulty vehicle, and the people on board should be quickly transferred to the right shoulder or emergency lane to give an alarm quickly.

0.50 m

100 m

About150m

D.200 meters

Correct answer: C.150m.

The speed of a car on the expressway is generally around 100 km per hour, and the safe distance to follow the car is one thousandth of the speed, which is about 100 m. The braking distance of a car 100 meter is about 40 to 50 meters, which means that one foot brakes to the end. Under normal circumstances, it is difficult for us to make such a clear judgment and then step on the brakes to the end, so the warning sign must be placed outside 150 meters.