What should drivers do if they experience brake fade?

Answer: D — Downshift to reduce speed

When drivers experience brake fade, it indicates that the brakes are becoming less effective due to overheating, often resulting from excessive use or riding the brakes. The correct response in such a scenario is to downshift to reduce the vehicle's speed. By doing this, the driver can utilize the engine's braking power, which helps decrease speed and relieves some pressure on the braking system. This is a critical action as it allows the driver to maintain control of the vehicle while the brakes cool down. Other options may not effectively address the issue of brake fade. For example, increasing speed would further exacerbate the problem by generating more heat in the brake system. Letting the vehicle cool by pulling over could be beneficial, but it is important to actively reduce speed first to ensure safety when stopping. Using the parking brake to stop is typically dangerous, especially at higher speeds, and may lead to loss of control. Hence, downshifting is the most effective and safer method to manage brake fade.