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Re: Canarsie CBTC

Posted by Stephen Bauman on Tue Jun 14 22:14:45 2005, in response to Re: Canarsie CBTC, posted by Jeff H. on Tue Jun 14 21:15:54 2005.

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True or False: The canarsie line CBTC implementation is a "moving block" system.

I'd never given that question any thought because I've never believed that a"moving block" system provided any significant capacity increase over a properly designed "fixed block" system.

Certainly, that article describing the placement of optical markers every 600 feet and the inability to discover any carborne equipment capable of determining speed and position points to a fixed block system. Unfortunately, if that article is correct in that the markers are placed at fixed intervals, then it will be a poorly designed fixed block system.

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