[bytesmith]

The study cited is questionable. The best independent source for helmet testing IMHO is virginia tech's, which show that these are about as effective as MIPS, not 98% better as the headline suggests:

https://www.helmet.beam.vt.edu/bicycle-helmet-ratings.html

Here's their methodology:

http://hdl.handle.net/10919/83760

[cowpig]

This is great! Is there anything like this for other kinds of helmets?