On ice, you must slow to a crawl. It is very dangerous to drive on ice. If at all possible, do not drive when the roads are icy. In some areas where there is a lot of icy weather, special studded tires are allowed. Because these tires can cause road damage, they are not allowed in many areas or on certain roads, or during summer months.
Some road surfaces are slippery at certain times or places.
These areas freeze first and dry out last. Overpasses and other types of bridges can have icy spots. The pavement on bridges can be icy even when other pavement is not. This is because bridges can be colder and more icy than other roadways. When the temperature is around the freezing point, ice can become wet.