Fouling Points

[umontu]

I've been looking into fouling point indicators.

http://www.railsigns.uk/sect11page2/sect11page2.html

The link above shows two types of indicators but says both are Scottish only; specifically they're used with RETB.

I've seen on heritage lines white posts with signs saying F/P like the one at Oxenhope in the link below.

http://www.rmweb.co.uk/community/uploads/monthly_07_2011/post-9324-0-71605500-1311873702.jpg

But how do they appear on the national network outside of Scotland and were they used in pre-nationalised days?

 

[Railsigns]

They usually weren't/aren't marked. Occasionally, in depot areas, a sleeper may be painted to denote the position of a fouling point.

 

[civ-eng-jim]

If the line has controlled signalling then there would not be a need for them as the S&C would be protected by a signal and prevent the conflict to occurring.

As "Railsigns" says, FP markers may be used where hand signalling takes place in depots or heritage lines.

Foul points and clear points are provided by the permanent-way designer to the signalling designer rather than for the driver's benefit.

 

[Joseph_Locke]

Foul points and clear points are provided by the permanent-way designer to the signalling designer rather than for the driver's benefit.

... so that the signalling designers can place their signals and ask the permanent-way designer to provide insulated rail joints at the FP.

The signalling designer can't do FP as they are 16' from the related CP (metric, good innit!) which is a Pway thing.

 

[civ-eng-jim]

... so that the signalling designers can place their signals and ask the permanent-way designer to provide insulated rail joints at the FP.

The signalling designer can't do FP as they are 16' from the related CP (metric, good innit!) which is a Pway thing.

IBJ should go at the CP....

 

[GB]

deleted

 

[Tomnick]

If the line has controlled signalling then there would not be a need for them as the S&C would be protected by a signal and prevent the conflict to occurring.

As "Railsigns" says, FP markers may be used where hand signalling takes place in depots or heritage lines.

Foul points and clear points are provided by the permanent-way designer to the signalling designer rather than for the driver's benefit.

They certainly are provided for the traincrew's benefit on RETB lines, where the only confirmation that the train is clear inside the loop is given by the driver. The signalling system will prevent a train approaching a point of conflict but won't necessarily (e.g. RETB and some parts of a mechanical installation) prove that it's clear afterwards. I suppose you could argue that the fouling point markers are provided as part of the signalling design using the information provided by the P-Way designer though...!

 

[Joseph_Locke]

IBJ should go at the CP....

Bu**er!

 

[ASharpe]

Bradford Interchange has a sign indicating the position of the fouling points for the run around track.

I found a picture online:
http://www.flickr.com/photos/54215493@N00/4849407091