As a retired truck driver,I can attest to the fear a driver feels when his brakes fail.Had that happen to me when the municipality I worked for decided I should use a truck with hydraulic brakes that been sitting for over a year.The brake lines had rotted to the point that the brake fluid literally started spewing out as I was making my way through a high traffic area.Thankfully I could gear the truck down to a stop.I was sweating pretty good by the time that drive ended.