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| Re: Canarsie CBTC (97720) | |||
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Re: Canarsie CBTC |
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Posted by Stephen Bauman on Sun Jun 12 08:01:54 2005, in response to Re: Canarsie CBTC, posted by Jeff H. on Sat Jun 11 23:42:23 2005. My lips are sealed. Let's just say that the vendor's concept of speed measurement (using a proprietary optical technology) didn't work out and now the mad scramble is on for alternatives.That sounds like FUD spread by a "followup" contractor who was awarded two weeks in Philadelphia or a TA project manager trying to avoid the Punishment of the Innocent Phase. Reliable optical and magnetic speedometer/tachometer techniques have been around for decades. Siemens is in the business of building transit vehicles that have installed speedometers. I doubt if they outsourced the Canarsie CBTC design to some outfit in Eastern Europe. That sounds like a very wise barb, but on further analysis it falls apart....I'll bet CBTC doesn't work in a blackout either. I guess I hit a raw nerve there. I don't think your knee jerk reaction of scope is justified. I interpreted your challenge of comparing the impact a zone controller failure in a CBTC system with a localized failure in a track circuit based system. The failure's cause was never mentioned. I simply chose an incident that showed that big elms can grow from small acorns or rather a small water leak that is allowed to proceed for several years. |
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