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| Re: CBTC + Short Turn Terminals = Affordable 40tph. (1228444) | |||
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Re: CBTC + Short Turn Terminals = Affordable 40tph. |
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Posted by Stephen Bauman on Wed Jun 12 19:24:26 2013, in response to CBTC + Short Turn Terminals = Affordable 40tph., posted by Outside the Box on Wed Jun 12 17:48:16 2013. Considering yard constraints and real estate acquisition challenges, sustaining 40tph, with the train lengths we have today, would require short turn terminals. The presently overcrowded sections would run 35-40tph, while sections farther out get 10-20tph.Actually, terminal capacity has been reduced because of design changes to make them fail safe for CBTC equipped rolling stock. Prime examples are Jamaica Center and the now defunct South Ferry terminals. CBTC cannot control interlockings. They are operated by a standard block system. Cutting out the brake system in the front disables the brakes in half the train length. The protective trippers for interlockings have been moved 300 feet back to avoid a repeat of the Roosevelt Ave wreck, Moving the interlockings 300 feet distant from the station is what has reduced terminal capacity. |
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