Fog can be very dangerous especially when fog is heavy, and visibility is low.
When you drive in fog:
Keep your windshield clean and clear
Make sure that your windshield is clear, so use your windshield wipers and your defroster when needed.
Use your low-beam headlights
Always use your low-beam headlights in foggy condition and use fog lights if your vehicle is equipped with them; this will help other drivers to see your vehicle. Never use high-beam headlights because it will reflect on fog and causes glare and reduces your visibility.
Avoid driving on highways
Avoid driving on highways, freeways or roads that have a high-speed limit. This is because some drivers may continue going fast and some drivers may slow down and if there are any hazard or traffic situation that are more likely caused by fog, you won't be able to see it and stop in time before it is too late.
Try to take side streets with slower traffic, so you have enough time to stop in case there is any hazard ahead of your vehicle.
To avoid highways and take the side street, if you have a smartphone with Google Maps, you can pull over and enter your destination address and set the “Route Options” of your Google Maps to “Avoid highways.”
Slow down and be prepared to stop
It's hard to judge speed in fog, so use your speedometer to see how fast you are going and slow down to a safe driving speed.
When there is a heavy fog, some drivers may slow down substantially or even panic and suddenly stop, so, always allow a larger following distance and watch out for slow or stopped vehicle and be prepared to slow down or stop.
Stay in your lane
If you cannot see what is in front of you, and to stay in your lane, follow the lines on the road.
Avoid making unnecessary traffic maneuvers
Avoid making traffic maneuvers that are not necessary such as changing lanes or passing; this is because visibility is much lower during fog, and other drivers may not see you changing lanes or trying
What to do if you need to stop
When there is a heavy fog, and the visibility is at a dangerous level, you need to realize that not only you cannot see other vehicles or objects, other vehicles have the same problem, so the situation is very dangerous.
Try to exit the highway if you can and drive to a side street and a safe place away from traffic to the park and wait until fog wears off.
If you cannot exit the highway because there is no exit nearby, and the visibility is really bad, and your only option is the highway shoulders, follow these tips:
