1. The snow on the road turned into ice. The commonly used method is to sprinkle chemicals. This method is usually used to clear the ice and snow on the road in the world. The main melting agents are salt and alcohol.

2. However, this method will be greatly affected by the ambient temperature. As long as the ambient temperature drops, the melted snow will freeze into ice again, so that the road surface will be smoother.

3. If the snowfall is too large or the ambient temperature is too low, the snow melting agent itself is difficult to dissolve and melt quickly, and it has to be crushed by vehicle tires.

4. In addition, sprinkle some salt, cinder and materials with a certain particle size on the ice and snow pavement. This method can improve the friction coefficient of ice and snow pavement.