Amtrak’s initial report card on freight railroads ranges from A to a pair of F’s

"Put in perspective, an "F" host forces Amtrak trains on a particular route to wait one hour and 40 minutes on average for freight trains, and forces many Amtrak trains on this route to wait as long as 3 hours and 12 minutes," the report card says. So how did the big six of railroading do? Canadian Pacific …