Ever wondered why large trucks and trailers use air brakes instead of the hydraulic brakes found in most cars? In this video, we break down the engineering and safety reasons behind this essential ...

Tractor trailer drivers who crest a hill shouldn ... Greg Brown, the CEO of BR Williams in Oxford, Alabama said by phone that air brakes on trucks can fail in at least two ways.

meaning they use fluid to operate (there are also compressed-air brakes, but they’re used on tractor-trailers and other large trucks). When you hit the brake pedal, you’re pressing a piston ...