How about cities without any traffic signs or lights?:
European traffic planners are dreaming of streets free of rules and
directives. They want drivers and pedestrians to interact in a free and
humane way, as brethren — by means of friendly gestures, nods of the
head and eye contact, without the harassment of prohibitions,
restrictions and warning signs…Ejby, in Denmark, is participating in the experiment, as are Ipswich in England and the Belgian town of Ostende.
It may sound like chaos, but it’s only the lesson drawn from one of the
insights of traffic psychology: Drivers will force the accelerator down
ruthlessly only in situations where everything has been fully
regulated. Where the situation is unclear, they’re forced to drive more
carefully and cautiously.
Some towns are even looking to abolish the distinction between roads and sidewalks. Here is the full story, can any of you report on these experiments? And if you are looking for your "Germany fact of the day," the country has 648 different and valid traffic signs.
Thanks to John Durant for the pointer. And here is Dan Klein on skating rinks.