Humanity as a whole seems to have decided that traffic deaths are an inevitable consequence of modern city living (regardless of whether that's actually true or not). I don't think a handful of politicians deciding otherwise would move the needle much.

Why would a politician's child be walking around in a poor neighborhood where traffic deaths are common.

Every politician has a publicly funded family doctor while 30% of average Canadians have no access to one.

And most of those same politicians can afford to pay for private doctors unlike the majority of their doctorless constituents.