When they closed the Carpenter road crossing we were told we should have our blue lights on when crossing there to avoid problems. I take our ambulance across that way pretty often, and you really have to be careful not to cause an accident since people on the parkway are not sure what to do when they see the ambulance waiting to cross.
I used to go to a lot of fatal accidents at that intersection and I can tell you there are a lot of people alive today because they finally closed it. Usually it was the local person crossing that pulled out in front of a car and got T boned, so it is our neighbors that are being saved.
To get to Hosner Mtn Road on the east side of the parkway get off at Rt 52 exit, turn right (West) , then turn left onto hosner mtn road just after Hyatts garage and it will take you across the new overpass. It will take you a few minutes longer then going through the SP barracks.