Other than slow down in the first place.
Not far from me, on Interstate 77 at Fancy Gap, the interstate experiences a serious drop in altitude over a short distance and there is serious fog on numerous occasions.
Serious fog that limits visibility to 50 feet or so. And drivers will just barrel into a thick fog bank doing 75 miles an hour. They've had numerous pile-ups there, including one with 93 vehicles and three deaths in
April 2013. And that was with traction that was fine. You just couldn't see very far.