Final answer:
When approaching a vehicle from the rear at night, you must dim your bright headlights within 300 feet to avoid blinding the driver ahead.
Step-by-step explanation:
When approaching a vehicle from the rear at night, you must dim your bright headlights within 300 feet. This is to ensure that your bright lights do not blind or distract the driver of the vehicle in front of you. Dimming your headlights will reduce the intensity of the light beam, allowing the driver ahead to see more clearly and avoid any potential accidents.