What is the correct action if you experience brake failure?

If you experience brake failure, pumping the brakes rapidly can help build up hydraulic pressure in a conventional braking system that does not have anti-lock brakes. This action may allow you to regain some braking ability, which can help you slow down or stop the vehicle safely. It's essential to remember that this technique is only effective in vehicles without anti-lock brakes; in vehicles equipped with ABS, the driver should apply firm, continuous pressure on the brake pedal instead of pumping it.

While the other options may seem reasonable, they don't address the immediate need to slow down the vehicle effectively. Shifting into neutral and turning off the engine can be dangerous, as it may lock the steering wheel and prevent you from controlling the vehicle. Applying the parking brake should be done cautiously, as it could cause the vehicle to skid or roll, leading to a loss of control. Signaling for help and waiting would not be practical, as immediate action is needed to avoid a potential accident. Overall, knowing how to respond quickly and effectively in such a situation is crucial for maintaining safety on the road.