Post by dw54 on May 7, 2009 1:45:03 GMT
This post complements my other post asking about "microblock" signalling and "following on".
To the knowledge of those here, has LU formally examined two methods for reducing the impact of heavy loading and platform crowding on total line throughput (tph) and hence capacity:
1) Double-sided platforms - with one variation on the theme dedicating one side for waiting pax, so exiting pax have a clear platform on the other.
2) Bifurcation - where two platform tracks are provided for each approaching track. While one train is stationary at a platform, the next train runs into an adjoining platform road (ideally they should be either side of an island platform waiting area, even if double-sided).
[Side remark: You all know what it's like with an UP-DOWN-UP-DOWN configuration and a cross-over on the approach to your station. I used to commute from Leagrave, and the then BedPan 317s had a wonderful tendency to approach on the Up Fast, and crossover to the Up Slow just before entering the platform. Over the bridge we'd all go!!!
]
Of course, stations like Earl's Court and Edgeware Rd have the layout of a bifurcated station, but are also either a junction or a terminal. So the question is, has there been a conscious process of examining the benefits of bifurcation and double-sided at the present mission-critical stations whose dwell times effectively dictate throughput and hence line capacity?"
Cheers
David
Perth, Western Australia
To the knowledge of those here, has LU formally examined two methods for reducing the impact of heavy loading and platform crowding on total line throughput (tph) and hence capacity:
1) Double-sided platforms - with one variation on the theme dedicating one side for waiting pax, so exiting pax have a clear platform on the other.
2) Bifurcation - where two platform tracks are provided for each approaching track. While one train is stationary at a platform, the next train runs into an adjoining platform road (ideally they should be either side of an island platform waiting area, even if double-sided).
[Side remark: You all know what it's like with an UP-DOWN-UP-DOWN configuration and a cross-over on the approach to your station. I used to commute from Leagrave, and the then BedPan 317s had a wonderful tendency to approach on the Up Fast, and crossover to the Up Slow just before entering the platform. Over the bridge we'd all go!!!
]Of course, stations like Earl's Court and Edgeware Rd have the layout of a bifurcated station, but are also either a junction or a terminal. So the question is, has there been a conscious process of examining the benefits of bifurcation and double-sided at the present mission-critical stations whose dwell times effectively dictate throughput and hence line capacity?"
Cheers
David
Perth, Western Australia
