What do you do when you are driving in fog that is soooooo thick you can not see anything at all? We have had about 4 foggy mornings,but you could see while driving in them. I could see all the other cars when they were close. Yesterday I drove into a fog that was so thick I saw absolutely nothing and I was so scared.The road was 4 lanes with a middle turn lane.Traffic lights were often due to shops,and the speed limit was 40. I had my lights on and hazzards,but after 20 feet of not being able to see the cars or lights I gave up and got off the road and tried a different route. When I got off I noticed that most drivers were still going 40mph. I guess that is the expected *rule* to keep going fast even though you can't see a darn thing?!!?!? Are there even rules for this? Only things I know are lights for fog and rain,and hazzard lights when you go under the speed limit.