Everything that is being talked about here is up at the VA / WV line where the new Rt 9 intersects with the "old Rt 9 / aka new Rt 115" and Chestnut Hill Rd.
Traffic traveling East and West on the New Rt 9 will NOT stop for any reason. They will have right of way at all times. Traffic attempting to change directions onto the "old Rt 9 / aka new Rt 115" will have to stop and yield right of way to oncoming traffic. There is one more aspect of this. Cars traveling Eastbound on the New Rt 9 will be slowed by Gravity. That is one big hill.
Yes, when traveling Westbound it will be "easy" to make a Right onto Chestnut Hill, but you won't be doing yourself TOO many favors when you have to make a left a Hostler. That intersection is no fun either.Personally, I think the easiest thing to do during "rush hour," rather than to try to make a left on old 9, will be to go right on chestnut hill and then left and up Hostler (Hostetler??) road then right on old 9 to Mission.