I did about 5000km in Berlin traffic by bike in the last 2 1/2 years and i can't count how often car drivers would have hit me without me paying close attention and having good breaks. At least every second day someone will cut into the bike lane while turning, not pay enough attention when turning right on crossings or underestimate speeds. Granted, i am not moving slow, and i drive a car myself and know that it is sometimes really hard to see bikes coming from everywhere so i accept these risks as normal, but improvements to the infrastructure would be awesome, since in many places it really is not great or outright dangerous. I recently visited Copenhagen and the bike infrastructure was amazing to see, however the city is 1/5th of Berlins size and there just is not a lot of car traffic.