If you roll up on a checkpoint, the rules can be similar — but you have to check your state. In places like California, if the checkpoint is set up properly, you must hand over your license, insurance, and registration. That’s physical cooperation, and you do it calmly. If they tell you to pull off to the side, you do it. If they tell you to get out of the car, you get out. That’s compliance with physical commands — not talking. What does not change at a checkpoint is this: you never consent to