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Signalling Variety in UK?

Class15

Established Member
Joined
30 Dec 2021
Messages
2,897
Location
North London or Mildmay line
Basically where there is no signalling but a driver is given an "order" to proceed over a certain section. The orders are produced by a dispatcher who is fully responsible for not issuing conflicting ones, possibly by marking an arrow on a graph whenever they issue one to show that section is occupied until the train reports at the other end. This was the predominant system in North America and still is on a few lines. Originally the dispatcher telegraphed the orders to a member of staff at each passing station, who wrote them out and handed them to the driver. These days the driver is dictated the order by radio and writes it down on a special pad.
Thank you so much!
 
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jadmor

Member
Joined
26 Nov 2013
Messages
95
That's a splitting distant signal. They were quite common at one time but then fell out of favour for a while. While there are a few modern examples around now, the one south of Perth is the last 'old' one that still survives.

A splitting distant signal doesn't have the same function as a feather, and both can coexist as elements of the same junction signalling arrangement. The feather (or alternative form of route indication) is displayed at the junction signal itself, whereas the splitting distant signal gives advance routeing information on approach to the junction signal.

There are photographs of the Perth splitting distant signals (outer and inner signals) on this page of my website.
Thanks for posting these links. Perth Is a fascinating relic, I imagine all this will be "modernised" in due course.
 

PaulMac

Member
Joined
25 May 2017
Messages
37
Had the bulldog clip not been invented by then?
Train orders are the Harry Houdinis of bull-clips. Blink and they’re gone - never to reappear until three months after your disciplinary hearing, when you find they were stuck to the bottom of your boot the whole time.
 

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