What should a driver do if they experience brake failure while driving?

When a driver experiences brake failure, the most effective response is to pump the brakes, downshift, and steer to safety. Pumping the brakes can sometimes build up enough pressure in the brake lines to regain partial braking ability, which may help reduce speed. Downshifting to lower gears helps utilize engine braking, slowing the vehicle down further while maintaining control.

Steering to safety is crucial in this situation. The driver should aim for a clear path away from traffic and obstacles, using the steering wheel to guide the vehicle. This combination of actions focuses on maximizing the driver's control over the vehicle and finding the safest route to stop.

Other options could lead to dangerous outcomes. For example, steering abruptly to the shoulder might result in losing control, especially if it's done at high speed. Accelerating to stop more quickly would not only fail to resolve the brake failure but could also lead to increased speeds that make handling the vehicle more difficult. Hitting the emergency brake immediately could lock up the rear wheels, potentially causing a skid or loss of control, especially on slippery surfaces. Therefore, option B provides the safest and most logical approach in the event of brake failure.