you need to look at the bigger picture (difficult i know for lefties) it would only happen to a few cars and even less drivers entering that roadside crusher, the vast majority of the population would soon be towing the line, keeping to the speed limits would greatly improve mpg and reduce climate damaging pollution, and the carnage on our roads would reduce, overall there would be far less deaths on our roads.
Same with the migrant boat problem, machine gun a few mid channel, the boats would stop overnight and within a year or two less lives would be lost at sea. A humanitarian solution.