Shot video of my drive down the mountain today. At the top, you can see where they're working on the new US-48 highway. It's under construction between just north of Maysville, WV and Thomas, WV. They're saying 2-3 years for that section to open up.
The mountain itself is 4 miles @ 10%. I'm in a conventional sleeper truck with a 53' trailer and 45,000lbs of charcoal for a load. My top speed on the grade was 25mph, with the engine brake doing 90% of the work, plus it stayed in 6th gear all the way down.
The 4 mile drive took just over 11 minutes top to bottom.
Scherr mountain - YouTube