When driving down a hill, why is it important to be in the proper gear?

Being in the proper gear while driving down a hill is crucial for utilizing the engine's braking effect. When a vehicle is in a lower gear, the engine can help slow the vehicle down, which reduces reliance on the brake system. This control is particularly important on steep descents where the vehicle's speed can quickly increase due to gravity.

Using engine braking minimizes the risk of overheating the brakes and provides better vehicle handling, thus enhancing safety. It allows the driver to manage speed more effectively and maintain better control of the vehicle. In contrast, being in too high of a gear can cause the vehicle to accelerate uncontrollably, increasing the likelihood of losing control or suffering brake failure.