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LU trains running ahead of time

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LU trains running ahead of time 10/03/2023 at 21:44 #150761
Red For Danger
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Hi - Not sure if this has been asked before but I have searched the forum and also the wiki and have not found this issue.

The problem I have is that the LU trains leave early and then run ahead of time for the rest of their timetable. They also want to depart immediately after arrival with no dwell time.

I'm not sure what may be causing this and wondered if this is an issue that needs to be resolved on the next update.

Save attached. I did have both 'Use freight linespeeds' and also 'Can use freight lines' ticked on the F4 menu for the LU train types as I understand this is the work round for the Harrow turnback solution, but I have since unticked the 'Use freight linespeeds' in case this was the cause of the problem - but the LU trains continued to run early.

Thanks.

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LU trains running ahead of time 10/03/2023 at 22:12 #150762
headshot119
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I've run around an hour of Wembley Suburban from 0520 to 0625 with no instances of LUL services departing early, nor did I have any issues with trains going into the turnback at Harrow and Wealdstone, this was using the supplied 2009 timetable with no amendments.

As the trains don't use standard headcodes I think ticking 'Use freight linespeeds' and 'Can use freight lines' has adjusted the Class of Service rule for them allowing them to go early.

"Passengers for New Lane, should be seated in the rear coach of the train " - Opinions are my own and not those of my employer
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LU trains running ahead of time 10/03/2023 at 23:13 #150765
TUT
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I'm not sure if it's intentional or not, nor am I precisely sure what kind of instructions Bakerloo Line drivers have with regards to the section shared with Network Rail (or in general to be honest), but most of the LU network is operated as a high-frequency metro service where a steady stream of trains (ideally at regular intervals, it's true) is prioritised over specific, advertised departure times. People don't generally turn up to Underground stations expecting to get a specific train at a specific time (there are exceptions). They simply get on the first one, which hopefully will be along in a few minutes. It's not like turning up to Great Malvern Station specifically to get the 11:55 to Paddington. As such, I understand generally LU trains leave as soon as they're able to. Which isn't to say they won't be held to time at key locations, nor that literally no dwell time at all is particularly realistic at all times of day, but I shouldn't have thought it's especially realistic for LU trains to wait for a specified departure time if they have a clear signal. Indeed LU WTTs don't list times for all intermediate stations.
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LU trains running ahead of time 10/03/2023 at 23:41 #150766
bill_gensheet
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There may be a current issue with defaulted dwell times generally.

Mantis 31269

That came from reporting a 'terminate & reverse' being done in 20s not the default of variable around 2 mins depending on train length

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LU trains running ahead of time 10/03/2023 at 23:45 #150767
headshot119
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bill_gensheet in post 150766 said:
There may be a current issue with defaulted dwell times generally.

Mantis 31269

That came from reporting a 'terminate & reverse' being done in 20s not the default of variable around 2 mins depending on train length
This isn't relevant here as the trains all have custom dwell times specified.

"Passengers for New Lane, should be seated in the rear coach of the train " - Opinions are my own and not those of my employer
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LU trains running ahead of time 11/03/2023 at 16:07 #150773
metcontrol
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TUT in post 150765 said:
I'm not sure if it's intentional or not, nor am I precisely sure what kind of instructions Bakerloo Line drivers have with regards to the section shared with Network Rail (or in general to be honest), but most of the LU network is operated as a high-frequency metro service where a steady stream of trains (ideally at regular intervals, it's true) is prioritised over specific, advertised departure times. People don't generally turn up to Underground stations expecting to get a specific train at a specific time (there are exceptions). They simply get on the first one, which hopefully will be along in a few minutes. It's not like turning up to Great Malvern Station specifically to get the 11:55 to Paddington. As such, I understand generally LU trains leave as soon as they're able to. Which isn't to say they won't be held to time at key locations, nor that literally no dwell time at all is particularly realistic at all times of day, but I shouldn't have thought it's especially realistic for LU trains to wait for a specified departure time if they have a clear signal. Indeed LU WTTs don't list times for all intermediate stations.
As much as it may sometime seem like LU don't operate to a timetable, they do on every line including those sections which are shared with NR. The Metropolitan Line also has customers who are familiar with the timetable (as the north end of the line runs a much less intense service) and do indeed turn up at the station for specific services.

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LU trains running ahead of time 11/03/2023 at 16:35 #150775
TUT
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metcontrol in post 150773 said:
As much as it may sometime seem like LU don't operate to a timetable, they do on every line including those sections which are shared with NR. The Metropolitan Line also has customers who are familiar with the timetable (as the north end of the line runs a much less intense service) and do indeed turn up at the station for specific services.
Thanks for this, nice to hear form you again.

Yeah, I'd say the north end of the Met is surely one of the most mainline-like sections of the Underground, and I did try to allow for exceptions like that. As an ex-commuter from Roding Valley (3 trains per hour, plus, in those days, through trains to aim for in the morning peaks) I certainly would try and get to the station for the right time. And indeed, of course, if trains run early they do get held to time.

Having said that, would you disagree with the broad-brush-stroke picture that I paint? Generally (so I gather) an average LU station stop will, if the starter's green, consist of opening the doors, waiting for everyone to get off, and everyone who can get on to get on, closing the doors, and going. And sometimes that can give fairly short dwells. Now I know on the Central they have their countdown timer in the cab and SelTrac has its countdown and all of that, but I shouldn't imagine any Bakerloo Line driver is going to be sitting at Regents Park or Embankment with a green signal waiting for booked departure time, partly because there isn't one in the WTT!

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LU trains running ahead of time 11/03/2023 at 21:48 #150783
bill_gensheet
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Circle trains used to have a long hold to time at Aldgate and Edgware Road which I assume was to wait time.
Assume there is similar now, maybe less obvious now Circles are not 'circular'

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LU trains running ahead of time 11/03/2023 at 23:59 #150786
bill_gensheet
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Red For Danger in post 150761 said:
I did have both 'Use freight linespeeds' and also 'Can use freight lines' ticked on the F4 menu for the LU train types as I understand this is the work round for the Harrow turnback solution
I did not find any problem sending 'passenger' trains via Harrow turnback (COS forced to passenger).

Last edited: 12/03/2023 at 00:01 by bill_gensheet
Reason: None given

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LU trains running ahead of time 12/03/2023 at 12:07 #150792
metcontrol
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TUT in post 150775 said:
Having said that, would you disagree with the broad-brush-stroke picture that I paint? Generally (so I gather) an average LU station stop will, if the starter's green, consist of opening the doors, waiting for everyone to get off, and everyone who can get on to get on, closing the doors, and going. And sometimes that can give fairly short dwells. Now I know on the Central they have their countdown timer in the cab and SelTrac has its countdown and all of that, but I shouldn't imagine any Bakerloo Line driver is going to be sitting at Regents Park or Embankment with a green signal waiting for booked departure time, partly because there isn't one in the WTT!
On the existing sections which are still signalled using what we refer to as "legacy" signalling, trains more or less did operate in that manner, but at each controlled area any early running would be regulated by local signallers. So for example a train could leave Watford on time, and in theory have swift station stops all the way south to Harrow, where it would then be held to time.

The Circle indeed used to have recovery at Edgware Road and Aldgate (as well as other locations). These days with the advent of CBTC the recovery is much more spread out with the system monitoring entire trips and speeding up / slowing down trains to attempt an arrival at each point as close as possible to timetable.

Last edited: 12/03/2023 at 12:07 by metcontrol
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