I think this depends on whether the policeman has probable cause and if the state has any statute or common law speaking to the question. If you challenge the

I think this depends on whether the policeman has probable cause and if the state has any statute or common law speaking to the question. If you challenge the policeman's (assertion of cause and) lawful order, what a policeman can do is take you before a neutral magistrate and have them decide if you refused a lawful order. This usually involves handcuffs and jail so you cannot abscond beforehand. And more punishment if you are wrong. But again I think this depends on the statute/common law of the state.