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Thanks OS for a clear explanation of the physical constraints of routing through Chicago but the thing about the article that’s bothered me for a week was this sentence. <i>Unlike the airlines, railroads don't have an oversight agency to co-ordinate their traffic: each of them uses its own dispatchers, who sometimes send faxes to their counterparts to let them know trains are coming.</i> That’s an IT problem not a physical problem. Before a container ship arrives in port a plan is drawn up to unload, transfer, and reload the ship in the shortest possible time. It looks like no one is responsible for this when trains arrive in Chicago. If that’s the case, inter-railroad information technology would expedite cargo through Chicago, to some extent, without building bypasses or running short-tonnage trains.
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