A gentleman (Der Alte Fritz) over on the axis history forum has made a number of very informative posts on the German and Soviet railroads prior to and during WWII. Some of the info includes why the Soviets were able to get so much more out of their system than the Germans got out of theirs. Here are some of the threads: http://forum.axishistory.com/viewtopic.php?f=76&t=198948&p=1847043#p1847043 http://forum.axishistory.com/viewtopic.php?f=66&t=203286