the problems with formula in general are open cockpit and no bodywork around the wheel. It is a security and aerodynamic problem (formula one's Cx is around 0.9 whereas Porsche 911's is 0.26)
So if you want to have a car totally safe you need closed LMP...that is totally non sense.
more : I don't know exactly the weight of a wheel in formula one, but I suppose it is about 5kg+ so finally your windscreen have to be really really strong to stop it ! Look at that : http://www.youtube.com/watch?v=1i4xN0vfpUk
if you want some example of how dangerous an open cockpit is, you only have to remember what kill Senna.
So if you want to have a car totally safe you need closed LMP...that is totally non sense.
more : I don't know exactly the weight of a wheel in formula one, but I suppose it is about 5kg+ so finally your windscreen have to be really really strong to stop it ! Look at that : http://www.youtube.com/watch?v=1i4xN0vfpUk
if you want some example of how dangerous an open cockpit is, you only have to remember what kill Senna.