The speed you travel on your bike directly contributes to the speed your head potentially hits something. Also the slower you travel the more time you have to react to or avoid or mitigate a crash.
We could require everyone to wear helmets all the time (for their own safety since someone could just fall over or trip at any time), but that's clearly not going to happen.
I think the more general point to consider here is that helmet laws are a distraction from larger issues surrounding traffic deaths and the way we design our cities and transportation systems.
We could require everyone to wear helmets all the time (for their own safety since someone could just fall over or trip at any time), but that's clearly not going to happen.
I think the more general point to consider here is that helmet laws are a distraction from larger issues surrounding traffic deaths and the way we design our cities and transportation systems.