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Re: Canarsie CBTC

Posted by Jeff H. on Sat Jun 11 23:42:23 2005, in response to Re: Canarsie CBTC, posted by Stephen Bauman on Sat Jun 11 07:28:18 2005.

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Something akin to an AC power failure at 33rd St on the Lex.

That sounds like a very wise barb, but on further analysis it
falls apart. The power failure had nothing to do with the choice
of communications-based vs track-circuit based, or relay- versus
solid-state based, etc. signal technology. The exact same failure
is equally likely to happen with a CBTC system. I'll bet CBTC
doesn't work in a blackout either.

I thought the TA's problems were related to the RF-DCS, not to measuring position and speed. Did they
require the vendor to get the speed reading off their mickey mouse speedometers instead of from the
propulsion system tachometer?

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.

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