The case law on reasonable suspicion of impairment stops is factually driven, and cases in which stops have been upheld are based on myriad different patterns of driving behavior. However, one thing that they all seem to have in common is that the driving pattern must be “erratic and the driving behavior created a reasonable safety concern by interfering or endangering other traffic.”
Exception: Where the citation that is issued to the defendant, does not require that the defendant's driving pattern create a reasonable safety concern for others.