Jubilee Line Terminus Dwelling Times

I guess Stanmore can have longer dwelling times as not as many trains terminate there than at Stratford with other western termini at Willesden Green, Wembley Park & West Hamstead, where the only Eastern Termini are at Stratford & North Greenwich which is hardly used (well the last time I checked).

Has platform 3 at Stanmore opened yet?

Is it a reasonable approximation that a terminal platform on a metro line can handle a maximum of 15tph then? Assuming that the opperation is unassisted and that the driver has no longer than 500' to walk between cabs?

Terminal capacity and opperation seems a fascinating science.

Interesting.

Thanks for all of the opinions.

As for the platform capacity, can a typic terminus platform handle 15tph? Surely this would mean 3 minutes stopped in the station and 1 minute changeover or something like that.

To Engineer:
Don't worry (from a reader's perspective) about long posts.
These last few posts on this thread have explained in a clear and concise manner,a complicated subject which most passengers never even consider but makes the running of a railway possible.
As a user of the Underground,rather than one working on the railway,I have found your posts really informative and easy to follow,and will certainly lead me to look out for things next time I use a terminus...
Keep up the good work!

Thanks engineer for all of the information.

So what would you say the minimum practical stopping time is? I mean ultimately the trains could stop at the station for as little as 20 seconds which would give as you said a frequency of around 24tph but what is the time that is most suitable and most likely to work on the tube?

I'm about as far from an expert as you can get, but I suspect that there will be no single answer. It will depend on things like the configuration of the stocks (a C stock with more doors and wider gangways is much faster to empty than an A stock), the volume of people entering and exiting (a busy terminus like Stratford JLE will require more time than a quieter one like Mill Hill East), the nature of the people entering and exiting (seasoned commuters at Bank W&C will require less time than heavily encumbered tourists at Heathrow) and possibly even the position of the platform entrance and exit relative to the train (exit and entrance in the same place will cause congestion, having them at or beyond one end of the train will cause uneven loadings on the train - see Stratford Jubilee for example), although there isn't much variation in the position of these at termini across LU (Epping platform 2, High Barnet platform 2, and the Heathrow stations are the only ones I can think of that aren't at or beyond the end of the train).

Fastest station stop I have ever timed (and then emailed to myself from my phone) was 16. 2 seconds.

So 34tph, wow that is a lot! But surely it is more practical to only allow a train around every 5-6 minutes on each platform for delay prevention and a bit of backup should anything go wrong.

Adding to this thread, I would state that the realistic max capacity of a 2 track terminus with scissors crossover is typically platform re-occupation time + 30 secs. The 30secs allows for door closing time, and operating margin. Brixton fits this scenario perfectly as the platform re-occupation time is/was 96secs, and the headway is 126secs. For the post upgrade planned 33tph to occur, I would expect that the platform-reoccupation time would need to be approx. 80secs.

The examples earlier in thread from Hong Kong are interesting. Chai Wan on the MTR Island Line now "only" handles 120 sec headways with 182m trains. The very long door closing sequence (trilingual door closing announcements and lots of beeping) starts before the inbound train has cleared the crossover. I was unable to see if any countdown timers or other methods initiated this time saving action.

For whoever it was that asked - yes the 3rd platform at Stanmore is in use now TBTC is in control of the whole line. The timetable was modified (WTT10) to make use of it.

WTT11 coming very soon, so the 4 min dwell will be less as stepping back will be used at Stratford

The new TT is indeed in operation, aswell as Stanmore platform 3, you can tell because the trains are really flying along now.

I travelled Canada Water - Bond Street today and the ride was great. Apart from Canada Water-Bermondsey, throughtout the train seemed to easily reach and maintain good speed and stopped very crisply. I need to try the rest of the line but today certainly felt more efficient. Hope it is sustained.