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if you are driving with your high beam lights on you must dim them at least 500 ft from any oncoming vehicle so you don t blind the oncoming driver you must use low beam lights if you are within 200 300 ft of the vehicle you are following consult your state s drivers handbook for details if an approaching car is using its high beams don t look directly into the oncoming headlights look toward the right edge of your lane
Therefore, because you cannot see as far ahead at night, you need to slow down to give yourself more distance to stop your vehicle. The minimum stopping distance for a vehicle with normal brakes traveling 55 m.p.h. under favorable road and weather conditions is approximately 230 feet.