|
|
| Re: Moscow metro trains per hour (49895) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: Moscow metro trains per hour |
|
|
Posted by Stephen Bauman on Sat Feb 12 08:24:16 2005, in response to Re: Moscow metro trains per hour, posted by stephenk on Sat Feb 12 05:40:17 2005. As well as the quite advanced automatic block signalling that the Moscow Metro uses, the other most important factor in running 40tph is the huge reversing capacity of the termini.NYCT's block system is not as primitive as the TA's brass would have one believe. Signal spacing decreases with the approach of stations and many stations have timed signals to permit following trains to run close to leaving train. NYCT's primitive block system is designed to handle 40 tph at intermediate stations (with 30 seconds dwell time) and is very close to the theoretical limit imposed by braking, acceleration and dwell time. Most NYCT lines branch out and have multiple termini. This means that individual termini do not have to handle the full volume of intermediate stations. Thus the station dwell times are often little more than 20secs, helping to allow for 40tph running. This is a chicken and egg question. More frequent service levels mean that there will be fewer people boarding and leaving at each station on each individual train. This means that less dwell time will be required. |
|
(There are no responses to this message.)
|
|