Rose shook her head. "Most of the east-west cargo traffic in this part of the country uses a line farther north that goes through a notch in the Unicorn Range—I gather it was an easier route to build, and it's more direct. This line winds through a long pass in the Smoky Mountains instead. It's not all that high, but it's got a lot of steep grades by railroad standards. From what she told me, they could get away with that because they mostly run short passenger trains on the route, and those are a lot lighter."