What is the safest way to control the speed of motor vehicles on a long downhill road?

The safest way to control the vehicle speed on a long downhill road is to use the engine to brake, reduce the transmission gear, reduce the engine speed, and don't step on the accelerator. With the full help of engine braking response, the braking frequency can be effectively reduced and the brake pad can be prevented from overheating and failure due to long-term braking.

When driving a motor vehicle down a long slope or continuously downhill, the speed will be faster and faster. When the braking temperature rises to a certain extent, the braking effect will drop sharply. The best way to control vehicle speed is to use low gear and make full use of engine braking to slow down.

When you encounter a long downhill section, you should pay attention and drive slowly. Watch the roadside. There are very eye-catching warning signs on the long downhill section, and there are deceleration roads with obvious color tips under the wheels. Remember how far ahead there is an emergency lane.

Try to avoid overtaking when driving a motor vehicle on the downhill section of a mountain road, because the speed on the downhill section is easy to be too fast due to gravity, and the vehicle is more difficult to control than when it is flat. Overtaking is prone to danger at this time.

Matters needing attention when descending a long slope:

Before going down a long slope, check whether the braking performance of the braking system is good, and then the vehicle should slow down and slowly enter the downhill. It is forbidden to slide in neutral, and it is necessary to change into a suitable gear when entering a long slope, so as to reduce the sliding speed of the vehicle with the help of the braking response of the engine.