It was, but then all the Class-Ⅰ rail carriers merged until we were left with a west-coast duopoly (UP and BNSF) and an east-coast duopoly (CSX and NS) and they

It was, but then all the Class-Ⅰ rail carriers merged until we were left with a west-coast duopoly (UP and BNSF) and an east-coast duopoly (CSX and NS) and they closed all the “redundant” lines they could. See Abandoned & Out-Of-Service Rail Lines map: https://www.google.com/maps/d/viewer?mid=10akDabya8L6nWIJi-4Zor-QawkoJmmMK&femb=1 https://www.google.com/maps/d/viewer?mid=10akDabya8L6nWIJi-4...