So I started biking recently and was hunting for helmets. And turns out Virgina Tech does a bunch of helmet impact testing and maintains a ranking list https://www.helmet.beam.vt.edu/ . The latest helmets have a releasable layer that absorbs (converts rotational energy?) more impact. This HUD is pretty slick. In a way, it's more preventative (avoiding accidents) vs. reactive (absorbing impact in an accident) safety w…
To my knowledge, the only group that tried to test bike helmets against a car is Volvo -- and all helmets failed.