Safety first!

I have never seen so many police, security guards and traffic police as in Mexico City. Every store seems to have its own guard or two, even McDonalds has a guard. The record stands at five! 5! traffic police in one paltry intersection. One small two-way intersection, nothing special about it. Two were doing one way, and three were doing the other way. All doing the same thing, just waving the traffic on...