Why do accidents happen?
It would be much quicker to actually list "why aren't there more accidents?"- It is an absolute miracle!!
The only way to reduce car accidents is the removal of driving licenses and the impounding of cars for repeated infringements.
To reduce pedestrian deaths, under passes and overpasses are required as well as common sense-the shortest /quickest route from one point to another is definitely not the safest-DUH!!
Cyclists- crackdown and fine pople or impound their bike if they don't have a cycle helmet or light on their bike, and if they are going down a street the wrong way-cycle lanes work in other countries but I suspect that would become an undertake lane or carpark zone!!