We're big on crumple zones for a variety of reasons. First, it's a sort of obvious solution that recognizes the laws of physics without trying to overcome them. By extending the time of the crash it reduces the force, which is a great idea. Second, unlike other safety devices, it doesn't add significant weight to the car. It's more about designing the existing structure to fail predictably. Most importantly, though, is the added benefit for rodders. Crumple zones in modern vehicles, especially of a certain era, means gigantic expanses of area ahead of the passenger compartment for engine swaps. Oh, and they work.
What about you? What's your favorite safety feature?
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