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| Re: Chicago CTA Has Only 3 Series Now (1321864) | |||
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Re: Chicago CTA Has Only 3 Series Now |
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Posted by WillD on Fri Oct 31 23:06:48 2014, in response to Chicago CTA Has Only 3 Series Now, posted by ChicagoPCCLCars on Fri Oct 31 18:31:47 2014. That should be an acceptable number of rolling stock generations for a system of that size. It allows for about a forty year lifespan with new purchases every 12 years. IMHO they're hurrying the 7000 series cars and will end up with a block obsolescence problem when the 5000 and 7000 series cars come up for replacement. It's unfortunate they were so conservative with the 3200s, as they'd probably prefer to get rid of their DC motors in a relatively short timeframe. Of course if they went with an off-the-shelf Flexity or similar design they could save a lot of money over pretending they're a subway. |
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