RAILROADING 101
'(<a href="http://www.j-archive.com/media/2011-11-25_DJ_30.jpg" target="_blank">Alex delivers the clue from aboard a train on the Western Maryland Scenic Railroad.</a>) The engine is working a little harder now because we're going up a 2.8% one of these; you call it a slope or an incline; railroaders call it this'
a grade