What effect does increased speed have on traction?

Increased speed generally decreases traction due to the physics of motion and friction. As a vehicle moves faster, the force exerted between the tires and the road surface can become insufficient to maintain effective grip. This is because traction relies on the frictional force, which diminishes as speed increases, particularly in adverse conditions such as wet or icy roads.

At higher speeds, the centrifugal force acting on the vehicle increases, which can lead to a loss of control and an increased likelihood of skidding or sliding. The tires have less time to react to changes in road conditions or obstacles, which further exacerbates the loss of traction. Therefore, managing speed is crucial in maintaining proper traction and ensuring safe driving conditions.

The other responses indicate that traction could be increased, remain unchanged, or vary without considering the direct impact that increased speed has on traction under normal circumstances.