Saturday, 23 August 2014

Huyton Track 4

I passed through Huyton Station this morning and noted that rails are now in place on track 4, the future Up Chat Moss Slow.  The rails run from a point somewhere in the distance towards Roby (As far as I could see in the rain!) to the east end of the platform at Huyton.



I presume this work is being done so early because it's a lot easier messing about with cranes before the masts and wires are erected.

Sunday, 17 August 2014

Every Cloud Has A Silver Lining

Most of you will already have heard of the chaos yesterday morning which was announced as being due to vandalism of overhead wires at Broad Green.  I was otherwise engaged so unable to go out and about to see exactly what was happening, but I could see on the screens that the service was wrecked until about noon.

The silver lining for me was that trains were reversing down to up in Huyton platforms two and three, so examining the detailed logs from my live signalling system allowed me to learn how these uncommon moves work, and I have now been able to add the extra berths and signals to the diagram.

Admittedly, not much compensation for anyone whose journey was disrupted, but it made me happy, at least!

The signalled reversing moves available are:
  • From the Down St Helens into Huyton P3, stopping at fixed red LL9592, and reversing to depart in the normal up direction towards Chat Moss or St Helens.
  • From the Down St Helens or the Down Chat Moss into Huyton P2, reversing to depart under the control of LL9588 onto the Up Chat Moss.
I believe there's also the possibility of an UP train reversing on the Up Chat Moss east of Huyton and proceeding down into Platform 2, controlled by position light signal LL1577, but I haven't seen this happen yet.

Thursday, 14 August 2014

New Signals At St Helens

I'm told a number of replacement signals have been installed at St Helens recently.  In most cases a new post and head, but at least one is a new head on the existing bracket.

As far as I am aware, these are one-for-one replacements and not a full-blown resignalling project, and the signalling continues to be controlled from the same box.  Certainly, they are still plated 'SH'.


Monday, 11 August 2014

Live Signalling Diagram

Some readers of this blog will have already realised that I have for some time been playing with the open data which Network Rail make available.  It's about time I shared some of my results, so I though I'd offer my live signalling diagram for your entertainment.  Here's a screenshot - Not much going on at three in the morning during an engineering possession, I'm afraid.

To see for yourself, go to http://www.charlwoodhouse.co.uk/rail/livesig
Your username is guest and the password is livesig

Please note:
  • This is very much experimental software, and I am still working on it, so it may change, fail, or disappear at any time.
  • It's a bit finicky about browsers, IE 9 and Firefox 31 seem to be OK.
  • The server is a very low performance one.  If I see signs of overloading, I will have to turn off the guest login, without warning.

With those points in mind, why not have a look?  Let me know how you get on.

Saturday, 9 August 2014

Overtaking

Watching the live signalling today I was pleased to notice that proper overtaking moves have been programmed into the schedules.  Each hour the stopper from Wigan to Liverpool via Newton (The line through St Helens Central is closed.)
uses the crossover into Huyton platform 2 and then waits while the fast Newcastle to Liverpool train behind it passes through platform 1.

So far it seems to have worked quite well.  The schedules have a seven and one half minute stand at Huyton for the stopper, to allow for a bit of late running.

The same was happening last weekend, but I hadn't got the signalling diagram fully working then.

Oddly, despite using the overtaking move, the timetablers are still showing down trains on platform 1 and up trains on platform 2 at Huyton.