In Texas particularly south Texas such as the Houston area we have fog with regularity 
in the winter and spring. Driving in fog can be very dangerous and has lead to many Houston truck accidents, injuries and deaths.
Fog is really a cloud that is at on near the ground, and is made up of very small water droplets suspended in air. And the problem with fog is that it reduced our visibility, sometimes radically.
A Dense Fog Advisory it means that your visibility in the advisory area can be reduced to one quarter of a mile or less.
Truck Drivers must use extreme caution to avoid a truck accident when driving in fog, the Federal Motor Carrier Safety Regulation 392.14 provides:
§392.14 Hazardous conditions; extreme caution.
Extreme caution in the operation of a commercial motor vehicle shall be exercised when hazardous conditions, such as those caused by snow, ice, sleet, fog, mist, rain, dust, or smoke, adversely affect visibility or traction.
Speed shall be reduced when such conditions exist. If conditions become sufficiently dangerous, the operation of the commercial motor vehicle shall be discontinued and shall not be resumed until the commercial motor vehicle can be safely operated.
Whenever compliance with the foregoing provisions of this rule increases hazard to passengers, the commercial motor vehicle may be operated to the nearest point at which the safety of passengers is assured.
While professional truck drivers have very specific marching orders about what to do in fog, drivers of automobiles should follow the same safety precautions.
Texas Department of Insurance published a bulletin offering the following safety advice to avoid a car accident in Texas when driving in fog.
• Slow down and do not drive faster than your
vision.
• be cautious, fog can become thicker without
warning and without being noticed until it is too
late to react.
• Increase following distance to ensure enough
reaction time and stopping distance.
• Turn on all your lights-including your hazard
lights. Use low beam headlights and fog lights.
go not use high beams.
• Turn on your 4-way flashers to give vehicles
approaching from behind a better opportunity to
see and notice your vehicle.
• Use windshield wipers and defroster as necessary
to maximize visibility.
• be ready for emergency stops by other vehicles.
• If possible, drive in a "pocket" where no other
vehicles are around you.
• Turn off your cruise control so you are in control
of your vehicle.
• Use the right edge of the road or roadside
reflectors as a guide.
• Listen for traffic you can't see.
• Do not change lanes or pass other vehicles, unless
absolutely necessary.
• Remember that other drivers have limited sight
distance and that fog makes the road wet.
• Signal early, and when you use your brakes, don't
stomp on them.
• Watch out for slow-moving and parked vehicles.
• If you cannot see, pull completely off the road
preferably at a rest area or truck stop.
• If you pull off the road, turn on your hazard
flashers immediately.
We have successfully handled many Texas truck accident lawsuits where fog played a role and the truck driver did not exercise extreme caution. When driving in fog- be safe- pull off the road- it will clear up and you can get to your destination in one piece.
