What is the purpose of the handbrake?

The handbrake, also known as the parking brake, primarily serves the purpose of securing the vehicle when it is parked. It is essential for preventing the car from rolling, especially on inclines, when the car is not in use. Engaging the handbrake holds the rear wheels stationary, ensuring that the vehicle remains in place even if the transmission is in neutral.

While the handbrake can also play a role in assisting with driving in certain situations, particularly on steep hills, its main function is to provide safety when the car is parked. The handbrake is crucial in avoiding accidents caused by an unintended rollback or movement of the vehicle.

The other options, such as assisting in driving uphill or controlling speed on downhill slopes, may involve the use of the handbrake in specific scenarios, but they do not reflect its fundamental purpose. Signaling other drivers, however, is entirely unrelated to the function of the handbrake, as it pertains to using indicators or lights to communicate intentions on the road.