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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
while you need to see the road you should not blind the oncoming driver with the glare of your lights you may find that some drivers approaching you will signal you to lower your lights while they are up to 20 seconds away this applies to vehicles you are meeting and vehicles you are following