Vic, reading your account brought flashbacks of a similar incident for me..
I was traveling on I-81 at night and, found myself in a pocket of fog that was pea-soup dense. I had slowed down to 40-45 mph, that's how bad it was, when out of nowhere I found myself being squeezed by those d#@#n Jersey barriers, both on drivers side as well as one straight head on..(It seemed that the intent was to squeeze you to the left) At the time, because of the fog, etc..I took the exit as my only recourse to avoid hitting the barriers.
I was braking all the way down the exit ramp..Luckly, my speed was only 40 mph at the exit's entrance.
I drove down the road a short distance and pulled into a closed filling station. Sat there for the longest time, recovering from the chilling shakes that followed.
Now this is the oddest thing, when I took the exit turn..I didn't know it was there ahead of time.. I had to have had an "Angel" looking over me~!
I resolved that, after this, no more night time driving with my Airstream.
Later, afterwards, I learned that there had been several auto accidents further down the interstate.