The topography around Cumberland is completely different than Syracuse. Whereas Syracuse had ample room for a bypass with plenty of spaced-out interchanges, Cumberland is surrounded by linear mountains that creep up over 1,700 feet. There aren't really any good crossings over the mountains, and you'd probably have to run I-68 south of the city over the N. Branch Potomac River, across Short Gap, and then around Cresaptown which would involve substantial property takings, a route by the airport's runways, and still involve steep grades.