Pedestrian accidents and high speed impacts brought about the current crumpling cars. Heavy steel cage for the passengers surrounded by stuff designed to destro

Pedestrian accidents and high speed impacts brought about the current crumpling cars. Heavy steel cage for the passengers surrounded by stuff designed to destroy itself in an accident at more than 15 MPH. (In a way that absorbs energy from the impact, protecting everyone involved). Also note that the lack of crumple zones leads to a lot more movement for anyone in the car as well. And not to mention if the outside crumples the inside is less likely to.