Defensive Driving · Driver Training VideoBrake Failure & Escape Ramps

Brakes almost never fail all at once. They fail in a sequence, and every step of that sequence hands you a warning first. Your job is to know what the warnings are, and to act on the first one instead of the last one.

There are only two ways you lose them. You lose air, or you lose friction.

Losing air is the fast one. A blown line, a chafed hose, a fitting that let go behind the cab. Your low air warning, light and buzzer, comes on before pressure drops below sixty psi. That is not a suggestion.

Losing friction is the slow one. That is fade. Shoes and drums cook on a long grade until the friction stops working. The pedal still travels. The truck just does not slow down.

You catch both of these in the pre trip, not on the hill. Build the system up, shut it down, and time your leak rate. Engine off and brakes released, no more than two psi a minute on a single vehicle, three on a combination. Now hold the pedal down. Three and four.

If they do go on a grade, you have seconds, and the plan has to already be made. Do not shut the engine off, because you need the steering and whatever air is left. Engine brake to its highest setting. Flashers on, hand on the horn, eyes looking for the out.

That ramp is not a monument to a bad driver. It is highway equipment, built for exactly this, and it is there because trucks lose brakes. A gravel bed and a tow bill is the cheapest ending this story has.

Your company standard: brakes are the number one vehicle out of service violation at roadside, so we pre trip them like a mountain is coming. Time your leak rate every day. Report a soft pedal, a long pedal, or a hot metallic smell the same day, not at the end of the week.