In Chile they are average, although we all get a little tense at peak hours.
In Argentina is bad... many large street junctions has not sign at all! no Stop or traffic lights: The stronger cross first.
The worst? Peru: just aweful, no speed limit, and the taxis horn you when they are abailable in case you want to take one; so you walk in Lima and you keep hearing horns again and again chasing you...
in order: 721,146,732,763,722,343,733,320,772,319,752,321,88,83,744,332,100,738, 333, 318, 77W, 78, 773, 380, 73G, 788, 789, 346