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| Re: Latest updates: R-179 order saga, R-160 CBTC for (L) line & special reports ... (1134955) | |||
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Re: Latest updates: R-179 order saga, R-160 CBTC for (L) line & special reports ... |
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Posted by Stephen Bauman on Wed Jan 25 23:16:39 2012, in response to Re: Latest updates: R-179 order saga, R-160 CBTC for (L) line & special reports ..., posted by Dj Hammers on Wed Jan 25 20:39:09 2012. would efficiency rise to the point of surpassing efficiency gains provided by CBTC?If by "efficiency" you mean service level capacity, then CBTC provides no gain over a properly designed conventional signal system. The existing 14th Street Line's signal system was properly designed. If you want to increase service level capacity, you need to work on improving the trains' service acceleration and braking rates as well as improving their emergency braking rate. Ironically, the operating characteristics of the Multis and Bluebirds that once operated on the 14th Street Lines had the capability of operating at higher service levels than the current crop of "new technology trains" composed of R143's and R160's. The old stuff was also faster. The running time of the 14th Street Express between Lefferts and 8th Ave was less than the current running time for the A train between these same two points. The Multis also made more stops. |
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