> These vehicles rarely make it above 40mph and the drivers often don't use seat belts. A crumple zone is going to still help in that case (40mph head on with

> These vehicles rarely make it above 40mph and the drivers often don't use seat belts. A crumple zone is going to still help in that case (40mph head on with another car at 40mph is significant, crumple zones in both vehicles would help both occupants).