Plateau, hilly area highway, built on the basis of natural geography conditions, road conditions is very complex, steep slope road is long, continuous downhill on common amounted to more than 10 kilometers, more than tens of kilometers, slope, generally 20 °, and difficult road, the road is general relatively narrow, than to go around the scenic mountain or hills, winding turns continuously, bad sight. On the roads, and often will be prepared to give way and parking, due to the frequent use of braking, easy to cause the rising of the temperature of the brake shoe and the friction coefficient of friction plate fell sharply, brake pressure and brake fluid produced gas resistance, reduce braking performance, serious when even cause brake failure, the tragedy in the elderly. So in the highland, hilly areas driving in addition to the usual to do a good job of vehicle maintenance and maintenance, to ensure that there is a reliable braking efficiency, but also must take some corresponding maintenance measures.

1. Safety inspection: Check before and on the way out of the vehicle, especially the technical conditions of braking, steering, transmission and wheel parts must be in good condition to ensure reliable work.

Second, the pipeline inspection Downhill in the former, especially under some long and steep, so must be stopped, look to look at the road, and then carefully check the brake system, whether pressure is in good condition, air pressure is enough, whether the brake pipe leakage (air brake), oil (hydraulic brake), the connection parts have any signs of loosening. We must deal with the situation in a timely manner and never take any chances. After confirming all the above, proceed downhill.

Three, the correct braking use of the engine's drag effect and foot brake to control the speed, do not step on the clutch pedal or put in neutral glide, and avoid emergency braking. Some drivers in order to save fuel, downhill blindly put neutral glide, or even flaming glide, which is very dangerous. Downhill, the car center of gravity forward, inertia force into the driving force downhill, so that the speed of the car naturally speed up, the steeper the slope, the longer, the heavier the car, the faster the speed, the driver had to use the brake to reduce the speed, in order to ensure driving safety. In addition. Frequent use of foot brake, the air pressure loss in the air storage cylinder is large, the air supply of air compressor is insufficient, may lead to poor braking. If the downhill use of the engine is not separated from the transmission produced by the drag to reduce the speed, the car will not overspeed, the lower the gear, the better the drag effect, to avoid frequent braking, to ensure safety.

Four, scientific driving when the downward slope is relatively long and the curves are particularly many and urgent, can be segmented driving. After running a certain distance, find a place to stop at a gentle slope with a good view of the front and back. Let the air tank fill up and the brake drum and shoes cool down before running.

When the car is running, the braking efficiency will decrease significantly with the increase of the temperature of the brake drum. Therefore, the car is equipped with a water storage device. Before going downhill, open the water storage device switch and make it pour water onto the outer surface of the brake drum to cool down, which can effectively improve the braking efficiency.

Six, the choice of high quality brake fluid hydraulic brake cars mostly use alcohol type brake fluid, the alcohol contained in it is very volatile. Frequent braking, easy to make the temperature of the brake pipeline to produce air resistance, so that the brake failure. If you choose some high boiling point, non-metamorphic quality brake fluid, you can greatly improve the driving safety factor.

In short, no matter how bad the driving conditions are in the highlands and hilly areas, as long as you reasonably control the speed and brake, always be careful everywhere, then your safety can be guaranteed.