From Rita thanks
When social interactions are more powerful than rules.
Imagine what would happen if you took down road signs and traffic signals. More accidents would surely result, or at least significant confusion and slower traffic. Or would it? The surprising thing is that a number of cities around the world have actually done this, and experienced dramatic declines in traffic accidents.
The idea is based on an urban design philosophy known as “shared space.” When drivers, pedestrians and bicyclists are forced to develop their own natural ways of interacting with each other, goes the thinking, they work out better social behaviors than the rule-driven behaviors dictated by professional traffic engineers. This does not mean an abandonment of design considerations, but rather a commitment to the larger public space designs instead of overly prescriptive traffic control devices such as traffic lights, signs and road markings. read more here