It depends on which traffic rules you are watching for. Car drivers are vastly more likely to break speed limit rules than bike riders are; in fact it's a minor

It depends on which traffic rules you are watching for. Car drivers are vastly more likely to break speed limit rules than bike riders are; in fact it's a minority of drivers I see who don't break speed limit rules (which leaves me wondering why they are still considered to be rules at all, in a supposedly democratic society; but that's another conversation) while it's a rare bike rider who is even capable of the athletics necessary to do so.