What mainly causes a skid?

A skid is primarily caused by the loss of traction between a vehicle's tires and the road surface, and the driver plays a critical role in maintaining that traction. When a driver reacts improperly to a situation—such as braking too hard, accelerating too quickly, or taking a corner at too high a speed—it can lead to the tires losing grip. In such scenarios, the driver's actions contribute significantly to the chance of skidding.

Other factors, like weather conditions, can influence driving performance and potentially lead to skids; however, it is the driver's decisions and handling of the vehicle that ultimately determine how well they can navigate those conditions. The vehicle's tires are essential for providing grip, but they rely on the driver's input to operate effectively. Similarly, while adequate road signage can assist drivers in navigating effectively, it does not directly control the vehicle’s movements and, therefore, plays a less significant role in causing skids.