Some basic Northen line information diagrams

[Nortube]

These following posts have diagrams that contain various Northern line information, such as distance between stations, opening dates, cabin codes, traction current naming, running times between stations etc. Click on the thumbnail to see a larger picture.

Basic line diagram       Opening dates
    



 

[Nortube]

Signal location by code    




Traction current section naming

[Nortube]

Traction current sectionalisation and substations


Permanent Speed restriction areas

[Zippy]

Even for a non-Northern line person this is interesting, many thanks.

[Nortube]

I don't know if you are referring to the train equipment or the diagrams.

The diagrams I'd used for different things in the past.

[Zippy]

My comment referred to the line diagrams with the cabin codes etc.

EP brake circuit description would interest me as it would apply to C stocks as well and these things are always helpful today.

[Nortube]

Now I'm more awake, I've realised that for some reason, when I made my last post, I thought that I'd got the train equipment diagrams and the Northern line diagrams in the same topic, hence the question! I've now edited my post and may put some of those comments in the train equipment post (Rolling stock board) later. I'll also put the EP brake there as well.

[Nortube]

Permanent Speed Restrictions
- a more detailed diagram. Originally drawn in 2008, it's possible that there may have been minor changes since then.

[Ben]

Wonderful diagrams, thank you for putting them on here.

Do you know whether the current upgrade includes any increases to PSRs? Did someone comment that entry to High Barnet p1 is now 30mph, for example?

[Nortube]

As far as I'm aware, the only reason for changes to the PSRs following the upgrade is where the PSRs were there purely to force the train to slow down and prevent drivers entering the platform at speed. I.e., following Moorgate, various forced speed restrictions were put in terminal platforms to ensure that the driver reduced their speed. Apart from the home signal being speed controlled, Traction Control was introduced which limited the amount of current supplied available in the platform area (barely enough for the train to motor) and policemen (trainstops without signals). There were as many as three policemen in a platform and they lowered at different speeds. Traction control was removed when the 95 stock was introduced.

With the introduction of TBTC, there is no need for trains to be slowed down and thus no PSR. The only place PSRs are needed are where the layout of the track demands it, such as diverging / joining the main line, curves etc. These PSRs would only be removed or speed increased if there was work done to the PWay. It may be possible that the overall speed of a section may be increased as TBTS is introduced, as long as the track can accomodate the higher speed. Some of the current PSR restrictions are due to signalling limitations. It used to be possible to reach 55-60 moh on a 38 stock approaching Totteridge SB, even though the limit was 45. I'm sure that the signals were the limiting factor and I see no reason why, under TBTC.that the PSR cannot be raised above the present 45 mph as long as the track is OK. One of the advantages of TBTC is that, with movable blockjoints, the speed of the train can always be varied as required, not restricted by the current fixed signals and blockjoints as at present.

An example of a PSR increase, although not related to TBTC works, was the increase in speed on the CX branch between Kennington and Waterloo. There was always a blanlet 30mpr PSR on the CX branch, despite there being a long straight(ish) section of track between Kennington and Waterloo, especially on the NB. Drivers normally used to ignore the 30mph anyway. A few years ago, the speed was increased to 35 mph on the south and 40 mph on the north. This knocked a few seconds off the running time. It's quite likely that other sections of the Northern line could be run over at a higher speed that at present and no doubt the speed may be raised above the blanket limit in places when TBTC takes place.

[ali]

Mar 13, 2013 16:36:59 GMT Nortube said:

These following posts have diagrams that contain various Northern line information, such as distance between stations, opening dates, cabin codes, traction current naming, running times between stations etc. Click on the thumbnail to see a larger picture.

Basic line diagram


Opening dates


Distance between stations


 

Very interesting but is there any chance of having the 'distance between stations' in miles?

[Nortube]

I'll see if I can sort it out. I think I have the original mileage somewhere rather than having to convert the existing metric figures.

I prefer metric and nearly always use it. However, when I did the diagrams the distances (taken from the timetable) were in km

00:04
Now added and put km and miles diagrams now in the same post below

[Nortube]

Northern line distances between stations

    
    
in miles                         in kilometres

[Nortube]

Northern line off-peak running times

            
in 1916 (C&SLRly)         in 1961 (WTT 14)         in 2008 (WTT 52)

They seemed to fiddle around with most new timetables, adding or taking away half minutes here and there.
A journey from Morden to Edgware via Charing Cross, and a journey from Kennington to High Barnet via Bank were both quicker in 1961!

[Nortube]

Northern line reversing points