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A comment on An interactive exploration of Boston's subway system. Parent comment

Re:An interactive exploration of Boston's subway system by akgerber on Tuesday June 10, 2014 @11:11AM (#7872947)
When new systems age, something similar to Chicago is likely to happen, which just closed a 1969-vintage line for 6 months to do a major reconstruction: http://en.wikipedia.org/wiki/Dan_Ryan_branch_(CTA)

By all accounts, it worked pretty well.

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Re:An interactive exploration of Boston's subway system by bane on Tuesday June 10, 2014 @12:29PM (#7873528)
I'm just concerned about the time-value of money thing and the utility of cheap labor when it's available. It really does get more expensive (relatively) to do this stuff decades later.
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