Bob,
When I lived down by Fresno we used to have some fog, but I remember pulling off the highway and stopping when I had to go to San Francisco a couple of times because the fog was so thick I couldn't see past the front of my car. The rest went right on at their 60/70 MPH as if it was a clear day. Then you would read about a 40 vehicle pile up. Some people just seem to think that because fog isn't solid you don't need to slow down.
We normally don't have much fog up here and what we do have for the most part follows the river and there will just be thick patches of it across the freeway in places, but they are normally not very long. These past two days reminds me of the Valley Fog.
Ron
