Fog
Fog can be thought of as a cloud at ground level. It forms when the temperature drops to the dew point (the temperature at which air is saturated), and invisible water vapor in the air condenses to form suspended water droplets. Fog can reduce visibility to 1/4 mile or less, creating hazardous driving conditions. If you can't postpone your trip until dense fog lifts usually by late morning or the afternoon follow these tips:
Drive with lights on low beam. High beams will only be reflected back off the
fog and actually impair visibility even more.
Reduce your speed and watch your speedometer. Fog creates a visual
illusion of slow motion when you may actually be speeding.
Listen for traffic you cannot see. Open your window a little, to hear better.
Use wipers and defrosters as necessary for maximum visibility.
Use the right edge of the road or painted road markings as a guide.
Be patient. Do not pass lines of traffic.
Do not stop on a freeway or heavily traveled road. If your car stalls or
becomes disabled, turn your vehicle's lights off, and take your foot off of the
brake pedal. People tend to follow tail lights when driving in fog. Move away
from the vehicle to avoid injury.
Reduced visibility conditions include twilight, darkness, rain, snow, fog, smoke, and bright sunshine.
Use moderation in judging safe speed. Slow down enough to maintain a
safe stopping distance.
Do no slow down so much that you become a risk to drivers behind you.
Be aware that in reduced visibility conditions, drivers tend to follow the tail
lights of vehicles in front of them. If you must pull off of the road, pull as
far off of the road as possible, turn off your headlights, take your foot off of
the brake pedal, and turn on your hazard lights.
Make sure you have a pair of sunglasses in your vehicle to deal with bright
sunlight.
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