Which action should you take if faced with brake failure while descending a steep hill?

When faced with brake failure while descending a steep hill, the most effective action is to shift into a lower gear. This method takes advantage of the engine's braking power, which can help control the speed of the vehicle without relying on the brakes. By engaging a lower gear, you allow the engine to slow the vehicle down through resistance, known as engine braking, thereby reducing the risk of losing control. This technique is particularly important on steep grades where maintaining a safe speed is crucial for preventing accidents.

In contrast, accelerating to gain speed increases the danger, especially when the vehicle is already difficult to control due to brake failure. Steering into oncoming traffic is not a safe maneuver and can lead to a head-on collision. Ignoring the brake issue, even if the vehicle feels steady, is also hazardous since it could quickly turn into a more significant problem, leading to a loss of control. Understanding these actions is vital for safe driving, especially in emergency situations.