At least some of that risk needs to be realized by the other drivers on the road. I don't know how many times I've seen a little shit-box commuter car zip into the safe following distance that a heavily-laden truck is maintaining, then stomp on the brakes, forcing the truck driver to burn their brakes and down-shift abruptly to avoid going right over the top of them. You don't stop 100,000 pounds in the same distance you can stop 2000.