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[quote user="zugmann"]No matter what the technology is, by the time it gets installed, of course it's going to be seen as outdated.  The stuff is outdated before it even leaves the factory.  The question is whether the "outdated" stuff is better than what currently exists. [/quote] True, it might be partly outdated by the time it is installed, but I think it is likely to be more outdated once it is installed if the railroads are forced to install what they feel is more outdated at the beginning.  The outdated stuff may indeed be better than what preceded it.  But even so, I would not conclude that forcing the wrong approach is a net win just because of that marginal safety improvement.  The issue is that the money wasted by forcing an inferior approach could have resulted in even more safety improvement in a shorter time had it not been wasted.
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