What are some potentially effective countermeasures, then? If the window is not open, or open about an inch or so – that is plenty to pass the drivers license and insurance card through, but not enough to expose the odor of alcohol. You can refuse to do lower the window to force the officer to make a forceful command to do so, making it difficult for them to argue you did so voluntarily. When speaking to the police officer through the almost closed window, the driver can avoid eye contact. This prevents the officer from being able to observe the cliché “bloodshot watery eyes” they imagine come only with drinking. It’s a good idea to have the drivers license and insurance card in hand immediately after stopping, well before the police officer walks up to the vehicle to request those. They are in your hands already, which are in plain sight on the steering wheel. If asked “have you been drinking tonight?” you are not required to answer or answer responsively.