Roanoke Times today reporte of the 75 vehicle pile up on I-77 near Fancy Gap, VA when dense fog set in. See this link.

http://www.roanoke.com/news/roanoke/wb/267878 "Two people died. Sixteen were injured when cars, vans, pickup trucks, an ambulance, a box truck hauling cattle and tractor-trailers collided -- sometimes violently -- in the dense fog that often limits visibility along this notoriously dangerous stretch of highway" "Visibility on I-77 at Fancy Gap was poor beginning at 10 a.m. Tuesday, just 250 feet to 500 feet, and motorists were warned with message boards, according to the Virginia Department of Transportation. "FOG AHEAD USE CAUTION" was displayed in a nonblinking admonition. Closure of I-77 was not considered Tuesday. It is not an option VDOT looks at as long as traffic can move. "The road remains open," unless physically impassable, VDOT spokeswoman Heidi Underwood said. "