For me it seems one of the most dangerous and aggressive acts not keeping the safety distance depending on the speed. A very simple rule seems to be absolutely unknown here: The “2-seconds rule”. When the car in front of you passes a significant point (e.g. light mast) just count in your mind “21-22″ (2 seconds). Your distance is safe as long as you do not pass the same point before you finished counting. But I have seen – whenever you keep that distance, other cars will fill this safety hole or even cars behind you will start showing aggressive behavior. One of the reasons might be wrong information giving in the driving schools, one teacher actually said that the distance is sufficient when you can see the back wheels of the car in front of you… What a defiance if simple Physics!!