I think we all know of an accident caused by an older driver. However we also know of those caused by younger drivers. It is a tragedy but it is fact. CARS are dangerous! It takes attention to detail to operate dangerous machinery. Those who loose that attention will have accidents. Loss of attention can be caused by age or by "knowing" that you can control the machine by operating it in your own fashion. Thus some people drive dangerously because they believe they are superb drivers. Accidents are caused by a number of elements. You can be the world's best driver and one second of distraction will kill you or somebody else. Stephen King was seriously injured by a guy who was focused on his dog instead of on the road. It was a young guy.