The War on Britain's Roads (BBC Documentary / tabloid tv)

Or, possibly more accurately, peoples perceptions of what is safe and what is not tend to differ, sometimes significantly.

This is why we need a common set of rules, so that we don't have to guess what the fuck the other people are going to do next.

A code of some sort? Maybe published in a book that anybody can get a copy of, maybe even provided by the government for free?

It'll never catch on

You've both hit the nail on the head.

Safety on the road requires all road users to behave in a predictable and controlled way. Anybody who feels that the rules don't apply to them because they are less likely to hurt somebody is ill-informed at best.