YSK if oncoming traffic flashes their highbeams at you they may be trying to tell you that a police officer with radar is sitting up ahead.
from /r/YouShouldKnow
YSK如果迎面而来的车流向你亮出高光束，他们可能是想告诉你前方有带雷达的警察。
YSK如果迎面而来的车流向你亮出高光束，他们可能是想告诉你前方有带雷达的警察。
YSK if oncoming traffic flashes their highbeams at you they may be trying to tell you that a police officer with radar is sitting up ahead.
from /r/YouShouldKnow