Here in Florida is 14' or more to share, less than that and the car has to move over, if possible, or wait till he has 3 feet or more between driver and bike.

I had a cop at 11:30 pm, three car lane on one direction, no car insight and he made a point in buzzing me within inches on my bike lane. I watch him on my rear view mirror as he was approaching me from behind, he was steady, but never made an attempt to move over to the other lanes. I ride at that time with three rear lights, two batteries (3 watts each blinking) and one dynamo rear steady red light and a reflective vest. Need less to say my BLOOD was boiling! I had no poem to calm me down, but had a prayer for my anger, forgave the ignorant bastard and felt better! Double O