Traction is a form of friction which descibes how well a tire clings to the driving surface. It is often called grip, and is extremely important for passenger and racing vehicles alike.
Forward & Reverse Traction
Forward traction helps a high-powered vehicle acellerate without spinning the drive wheels too fast (when compared to the speed of the road compared to the vehicle). This also helps the braking performance, making it harder to lock up the brakes, and reducing the stopping distance.