Which of the following must NOT be done when brakes fail while driving?

When dealing with brake failure while driving, the most critical aspect is to find a way to safely stop the vehicle without causing further injury or damage. Colliding head-on into a solid object is never a recommended action, as it can lead to severe consequences for both the driver and any passengers. It's essential to prioritize options that allow for control of the vehicle and a safer outcome.

Shifting to a lower gear can help to slow the vehicle down by utilizing engine braking. This technique is often used when the brakes are no longer effective, allowing drivers to reduce speed gradually. Similarly, using the handbrake can provide additional stopping power, particularly in emergencies, although it should be applied carefully to avoid skidding. Steering to avoid obstacles is also crucial in such a scenario, as it allows the driver to navigate away from hazards while attempting to slow down.

Understanding the appropriate actions to take when brakes fail can significantly enhance safety on the road, making it clear that colliding head-on into a solid object is the last resort and must be avoided at all costs.