Its an interesting question. I'm looking for some intelligent answers from engineers. Is there a reason not to, or a reason to..? I thought the likelihood of a head injury is pretty high if one is involved in an accident while inside a vehicle. So why aren't drivers wearing helmets? Is this something the car lobby would have vehemently opposed? Was the idea brought up before and found unpopular for some reasons, personal or design related? Would the design of cars today have to be changed to permit drivers to wear helmets? Let's discuss.
Thanks!