|
|
| Re: CBTC installation begins on the Flushing Line (1106979) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: CBTC installation begins on the Flushing Line |
|
|
Posted by Stephen Bauman on Mon Oct 3 07:06:55 2011, in response to Re: CBTC installation begins on the Flushing Line, posted by N6 Limited on Sun Oct 2 22:30:24 2011. They said CBTC would lead to faster trains that can run closer together, has this been true on the Canarsie line?NO!!! CBTC nor any other signal system does not increase the service level capacity. That is governed by acceleration, service and emergency braking rates, dwell times at stations and geometry at the terminal stations. The signal system alters none of these. The Canarsie Line ran 24 tph at one time. They are struggling to maintain 17 tph today. The 24 tph is limited by the terminals. Without terminal constraints, the intermediate station capacity is a nominal 40 tph for most lines. The Flushing Line ran 36 tph before the 1970's cutbacks, with multiple terminals at the Flushing/Corona end. The Third Ave El ran 42 tph with multiple terminals at both the uptown and downtown ends. Train speed, or more precisely end to end running time, is more a function of acceleration, service braking rate and station dwell time. Route architecture and schedules, designed to minimize merging conflicts are other factors. The signal system does not play any part in this. |
|
|
|