What to Do When the Service Brake Fails While Driving at High Speed?
2 Answers
When the service brake suddenly fails while driving at high speed, you should quickly downshift to a lower gear to reduce speed and then use the parking brake. When the brake suddenly fails while driving, the driver should use engine braking or the parking brake to slow down. If the service brake fails suddenly while driving, you should firmly hold the steering wheel, turn on the hazard warning lights, and use downshifting or the parking brake to reduce speed. First, control the direction to maintain straight-line driving, then turn on the hazard warning lights, slow down, and pull over to the side. If the brake pedal is not working, you should downshift promptly to second or third gear and gradually apply the parking brake without locking it, as locking the rear tires can cause skidding and increase the risk of an accident. Find a safe position, seize every opportunity to reduce speed, and remember not to press the clutch after successfully downshifting. On regular roads, if the braking system fails, you should control the direction and quickly shift the transmission into first gear while staying alert. If there are obstacles ahead, change lanes to avoid them; if there are no obstacles, do not force a lane change. If the vehicle does not slow down sufficiently in first gear, you can repeatedly apply and release the handbrake to further reduce speed.
When the service brakes fail while driving at high speed, don't panic. Staying calm is crucial—avoid slamming the accelerator or jerking the steering wheel. Try downshifting to slow down: for manual transmissions, gradually shift to lower gears to use engine braking; for automatics, shift to L or low-speed mode. Simultaneously, gently apply the parking brake with incremental force to prevent wheel lock-up and loss of control. Turn on hazard lights to alert following vehicles and slowly steer toward the right shoulder or emergency escape ramp. If the vehicle shows signs of severe instability, attempt to scrape against roadside guardrails or soft terrain to decelerate. Once stopped, exit immediately, place a warning triangle, and call for help from a safe distance. Regularly maintain your braking system, replacing aged brake fluid and worn pads to prevent such incidents.
