|
|
| Re: V Running/D Local on Weekends (861781) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: V Running/D Local on Weekends |
|
|
Posted by Concourse Express on Fri Nov 20 18:11:06 2009, in response to Re: V Running/D Local on Weekends, posted by R30A on Fri Nov 20 17:10:35 2009. The C is irrelevantWrong; if (C) service weren't crappy there wouldn't be much of a problem on CPW! The C would have to be running every 3-4 minutes for there to be a net time saved by running the D express(considering how little time the CPW express saves). False statement. Based on 2008 weekend numbers for Concourse and CPW, the (C)'s current 10-min headway, the (D)'s current 8-min headway, and an assumed time savings of three minutes for the CPW express, I found that leaving the (D) express and changing the (C)'s headway to every 8 minutes 57 seconds (NOT "every 3-4 minutes") would generate a greater net benefit per rider (+25.1 sec/rider) than running the (D) local (+24.8 sec/rider). This net benefit for running the (D) local decreases if: (1) The (D) runs less frequently than every 8 minutes, OR (2) The CPW express saves more than three minutes (a time saving greater than 3 min 41 sec guarantees that the (D) local will cause a net time detriment). Unless you add more (D) trains to compensate, (1) is guaranteed, taking away the little "benefit" achieved. That's why I believe it's better to add more (C) service; though the benefit on CPW local is smaller than a (D) local, there is no time detriment anywhere. Also, if the (D) runs less frequently, all (D) riders are affected, so now their detriment comes into play (my findings above consider only Concourse and CPW local ridership). *** formerly shadyelstation. my blog |
|
|
|