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OpenTrainTimes – Manchester Piccadilly Signal Layout

Trains1

Member
Joined
7 Aug 2024
Messages
148
Location
Manchester
Hi all,

I've just been watching the OTT signalling map and noticed that S337 and S349 were both displaying proceed aspects at the same time. Looking at the map on OTT, it doesn't look like that should be possible.

What made it even stranger was that train 5D33 appeared to jump from S337 to S349, and then to S393. However, on the OTT map, S337 and S349 are shown on parallel lines, so I'm struggling to understand how that could happen.

Furthermore, looking at the location on Google Maps' satellite view, I can only make out five signals on the gantry, whereas OTT appears to show six.

Does anyone know why this might be? Is it just a limitation of how OTT displays the signalling, or is there another explanation? I'd be especially interested to hear from any drivers or signallers who know this area.

Or am I missing something obvious?

Photos taken from OpenTrainTimes:


Description of the photos:

Photo 1: Train 5D33 is shown at S337, with both S337 and S349 displaying proceed aspects.
Photo 2: Train 5D33 is shown at S349, with both S337 and S349 still displaying proceed aspects.
Photo 3: Train 5D33 is shown at S393. S337 has returned to danger, while S349 and S393 are displaying proceed aspects.
 

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RailUK Forums

louis97

Established Member
Joined
14 May 2008
Messages
2,144
Location
Derby
The map is drawn incorrectly. Signal 337 is not alongside Signal 349. The points at the Manchester end of Mayfield Loop join to the Down Slow just before Signal 349. I believe Signal 337 will not clear until Signal 349 is showing a proceed aspect.
 

Trains1

Member
Joined
7 Aug 2024
Messages
148
Location
Manchester
The map is drawn incorrectly. Signal 337 is not alongside Signal 349. The points at the Manchester end of Mayfield Loop join to the Down Slow just before Signal 349. I believe Signal 337 will not clear until Signal 349 is showing a proceed aspect.
That would make sense, thanks I think I might have found S337 on satellite
What I think is S337 in red, and what I think is S349 in green

Photo taken from Google Maps satellite

== Doublepost prevention - post automatically merged: ==

@louis97, don't suppose you happen to know if S403 is approach-controlled? I can't seem to reliably decode the address and bit for it from the Network Rail data feed.
 

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Poggs

Verified Rep - OpenTrainTimes
Joined
28 Aug 2008
Messages
294
Location
London
Yes, please email support - a much quicker route to getting something clarified than asking in a forum!
 

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