What is the FIRST thing you should do if your brakes fail while going down a grade?

When facing brake failure while descending a grade, the first action to take is to get off the road as soon as possible. This response is crucial because it prioritizes safety by preventing further loss of control. A vehicle with failing brakes poses a significant risk not only to the driver but also to others on the roadway. By steering the vehicle off the road, preferably to a safe area like a runaway truck ramp or an open space, you can minimize the chances of a collision and damages.

The other options, while they may be relevant in certain contexts, do not directly address the immediate emergency your vehicle is experiencing. Applying the handbrake or using methods such as checking mirrors or turn signals would not effectively mitigate the risks associated with brake failure. Instead, the focus should be on gaining control of the situation and guiding the vehicle away from traffic and potential hazards.