The number one rule for driving in bad weather conditions is to slow down. The vehicle needs more time to come to a halt when a person is driving in bad weather conditions due to wet roads and low visibility.
A dry road offers more friction than a wet one. The number one reason behind bad weather accidents is a person driving too fast. Water, ice or snow on the road reduces the amount of friction, which means that it takes more time for the vehicle to come to a halt. Black ice is also very dangerous. The ice layer is so thin that it is very difficult to spot, so extra caution is needed when driving at temperatures close to the freezing point.