Call it brusque, boorish or downright barbaric. Whatever you call it, weaving in and out of traffic, laying on the horn and saluting with an upright digit is universally regarded as rude.

So who is most guilty of this offensive behavior? surveyed 2,000 drivers nationwide to find out. We found that roadway rudeness reaches its zenith in the following 10 states.

Top ten: Idaho, Washington, D.C., New York, Wyoming, Massachusetts, Delaware, Vermont, New Jersey and Nevada.

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