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Hi All, I'm a bit of a computer geek rather than a train expert, but I'm trying to design a kind of train simulator for home PC use. I'm a bit confused about freight trains. On some freight lines the freight speed limit is given as 40 or 50mph, yet average speeds published by the railroads seem to indicate they average about 20-25mph across the journey. Are these speed limits just theoretical maximums? Or are they really acheived by freights? If anyone can clear this up I'd be mighty grateful!
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