Quote:
Originally Posted by CharlesCO
Is this really true? Is there a technical flaw in an electric third rail design that prevents it from running 24 hours? Even if the current fleet and technology is stretched thinly, I would think technical improvements and a new fleet would be able to provide 24 hour service, and I always thought that the reason why it doesn't currently run 24 hours was merely due to political reasons.
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I think you misread the blog entry--there's no flaw. Whereas NYC has four parallel tracks in most subway segments, meaning they can cut the power to one set for maintenance and keep the other juiced and open for service, BART only has two parallel tracks under the Bay. In order to maintain the tracks overnight, they turn off the electricity and can't run any trains during maintenance hours.