The mandatory 3ft passing rule has caused atleast on Co town to ban bicycling as its roads are no wide enough. One problem with laws that include 'bright line' tests of guilt. Perhaps driver education would be better than aggressive policing. speed related scale - how is the speed going to be determined? vehicular homicide is already a crime, look up the definition of crime, criminal intent, ect. The problem with tampering with the laws is unintended consequences and the fact that adding laws also adds enforcement costs.