I travel over 40,000 miles per year for business. My area consists of seven states in the midwest. Chicago drivers are the worst, rudest, most aggressive drivers I have to deal with.
But, Chicago is not the only place you will get poor treatment from drivers while you are cycling. I live in a small town in SW Michigan and see my share of rude drivers. There are just too many people that lack the common courtesy of giving a cyclist some room on the road. Last summer I was even run off the road by a county cop.