What action enhances control when experiencing brake failure?

Downshifting into a lower gear is an effective action to enhance control when experiencing brake failure. When a driver downshifts, the engine's RPM increases, which can help slow the vehicle through engine braking. This action allows for greater control over the vehicle’s speed and can aid in bringing it to a stop without relying solely on the brakes.

In addition, downshifting can provide a smoother transition in speed and help the driver maintain better control of the vehicle, especially when navigating turns or adjusting to changes in road conditions. This technique is particularly useful in reducing the speed of the vehicle gradually rather than creating a sudden stop, which can lead to loss of control.

Other options may not provide the same level of control. For example, accelerating to gain momentum would likely increase the speed of the vehicle, making it harder to control. Steering sharply can lead to loss of traction or control, especially at high speeds. Using the handbrake immediately, while it may contribute to slowing down the vehicle, can lead to the rear wheels locking up and potentially causing a spin or skid.