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@Matt: No, 8-car trains do have more doors, but they carry more people too, which is an obvious advantage. In fact, an 8-car train has as many doors-per-person (and therefore door failure opportunities per person) as a 6-car train.

If you add more doors, you're increasing the ratio of doors per person, and therefore increasing the ratio of potential door failures per passenger carried.

by Tim on Apr 29, 2010 12:25 pm • link • report

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