Getting to 495 is a pain from Uxbridge. From the north, you have to take exit 20 (route 85), drive through milford along Route 16, then continue 10 miles further to Uxbridge center. From the south, you have to take exit 17 (Route 140) or exit 18 (route 126) and wind through the gridlocked dirt roads of Bellingham and mendon to get to Route 16.