A "Street Code" for Porto Alegre
The basic tenet of safer road use is the recognition of other road users as fellow human beings.
To this end we can start by making a plank of road safety in Eye Contact - even when you cannot directly talk to another road user, eye contact provides a way to communicate and delivers a fundamental guarantee that the other road user has seen you, source of the most basic excuse for colliding with another road user or their vehicle SMIDSY - Sorry Mate I Didn't See You.
There might also be a case to promote the mastermind rule - if a road user has started to carry out a manouevre others should work co-operatively to allow this move to be completed rather than force a priority right which actually makes life more difficult and confrontational - and that goes right back to eye contact and the related non verbal negotiation that follows from it.
More worrying is that deliberate acts by those controlling dangerous weapons still happen here is a case in point and a case to make it as difficult to obtain a licence for a motor vehicles as it is to obtain one for a gun in many countries.