A flashing yellow light requires drivers to always slow down and increase the width of their visual search, looking for danger coming from either side of the road. To aid your cautious efforts lift your foot off the gas and cover the brake. Look for danger and be pleasantly surprised when it does not appear. These flashing yellow lights are also put up near fire stations and can turn red when the fire trucks are called out for an emergency. Finally, we all know the flashing yellow light on the school zone sign means the school zone speed is in effect.