When driving at night using high beams, dim your lights when you get within __________ feet behind a vehicle traveling in your direction. 300 You have consented to take a test for the alcohol concentration of your blood, breath, or urine: Whenever you operate a motor vehicle in the state You should never attempt to pass a car on a two-lane road. false The minimum age to obtain an instruction permit in Texas is __________. 15 You must turn on your headlights ____ minutes after sunset ...