I have read several articles concerning truck brakes and the pros and cons of drum vs air disc brakes. There are a lot of opinions about which method is best. I even read a post about using water to cool brakes in an emergency situation. I know that truck weight is premium, and any added weight is that much less cargo a truck can haul. I have been thinking about hybrid cars and how they use regenerative braking to generate power during braking. There is a massive amount of energy expended in a heavy truck while braking. is there a way to harness that energy during the braking process and decrease stopping distance?