Ampelmann

One of the few East-German symbols to thrive post reunification are the traffic lights, specifically for pedestrian crossing. Known as the Ampelmann (traffic men), the stop light features a man barring the way, while the go light features a man walking, seemingly with great purpose. 

There are conflicting stories on whether these lights will eventually be replaced by the more mundane symbols of West Germany, but it is certainly one of the enduring symbols of Berlin.