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Re: Canarsie CBTC

Posted by Jeff H. on Fri Jun 10 03:59:41 2005, in response to Re: Canarsie CBTC, posted by Stephen Bauman on Thu Jun 9 21:45:28 2005.

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There are other ways of doing broken rail protection without track
circuits.

As for the AWS, I'd debate that it "need only handle 4 tph".
That may be the spec, but realistically it's a can of worms.
Especially on a line like 14 St/Canarsie, where there are very
few places to stash a bad order train. What happens when the
carborne CBTC equipment craps out (don't tell me that will never
happen!)? You'll have to go OOS and move that train as if it were
foreign equipment, over a considerable portion of the railroad.
If that happens during the rush hour you're screwed...you might do
better turning the whole signal system off and going to manual
block :)

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