Safe during the winter months?
Greenland Gap. No. Be veewwwy, veewwwy careful on it. The warnings about it on the previous thread were correct.
Took it this past weekend (daylight and at dusk.) Roads everywhere else were perfectly clear. Greenland Gap had about 1.25 car widths of clear pavement, with slush and ice on the edges. There were two fallen tree limbs that blocked half the road in two spots. On pavement, you can barely fit two cars heading in opposite directions. Things could get real sketchy if you encounter a car heading in the opposite direction or you drift for a fraction of a second. The new asphalt drops off 0.5 to 1 foot in spots, there are no guardrails, it is very curvy, and if you skid/drift sideways 1-2 feet in some spots your car will fall down 20 feet into a creek. (Those 1-2 feet are all on curves.)
I live in Annandale, VA (inside the beltway near Falls Church.) It did save 15 minutes over the Seneca Rocks Route. Wouldn't even consider it when there was recent snow.
Corr H to past Moorefield to Patterson Creek/Old Route 5 to Route 42 to 22O past Petersburg to standard Seneca Rocks route may save only a minute or two, but at least you bypass the local Moorefield/Petersburg traffic. It is my current default route.
May try Corr H to the end at Foreman, take a left (instead of the right to GG), then a right at 42 up to Maysville/Cosner Gap to 93.
All discussed on the previous thread and I pretty much agree with that thread. GPS should produce some interesting results to The Valley. I never listened to a machine, but plenty do.