Maybe we can stop blaming ... millennials, old people, middle aged, transplants, etc etc and look at the real cause - roads that haven't kept up with growth. I lived on the east coast for many years and the drivers there are way worse. Try merging into traffic in the D.C. Area. Good luck getting someone to use a turn signal in NJ or FL. The hard breaking is a result of crazy congestion on I-25 and traffic light patterns that require drivers to sit through two or three cycles to get through an intersection. I find drivers here overall very polite and accommodating despite the congestion.