bike safety

I built an e-bike that looks like a Harley Davison and I also added paddles that can be used as the ones on a normal bike incase I run out of battery juice and get stranded. This bad boy goes around 35-40 miles an hour on full throttle, I always wanted a helmet just for my head (half helmet...

After visiting the Netherlands recently I noticed an interesting phenomenon. It seems the Dutch don't wear bike helmets. I learned that under 1% of cyclists use helmets. I also learned that overall injuries to cyclists are way less than any place in the world, so what gives? From what I...