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Flooding detection?

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Flooding detection? 15/01/2020 at 01:57 #122867
JWNoctis
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Been wondering about it a bit - How would a flooding condition be detected on the tracks? Driver's report? TC shorted by standing water (but what about axle counters)? Nearby rain gauge? Some kind of dedicated equipment (or poor P-Way guy/gal posted nearby) at known wet spots for the purpose? I understand that it's probabably not really different from other obstructions like fallen trees or stray animals, but the question remained.

I remembered reading a discussion to that effect before complete with illustrations, but could not remember which, and a brief search had revealed nothing relevant in the archives - my search-fu had been weak lately.

Last edited: 15/01/2020 at 02:02 by JWNoctis
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Flooding detection? 15/01/2020 at 02:31 #122868
GeoffM
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There are certainly several locations with flooding detectors/alarms, especially in tunnels. Axle counters wouldn't be affected (but might go offline and thus show occupied if they're not waterproof), but track circuits may well "flood" on the panel/workstation (LOL) - depends on the type.

A certain amount of water is allowed for running trains, albeit at reduced speeds potentially. I'm sure somebody will be along with figures but I think broadly it should not be flowing (washing away ballast) and can only be up to the rail top.

SimSig Boss
Last edited: 15/01/2020 at 06:02 by GeoffM
Reason: Per Paul's post

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Flooding detection? 15/01/2020 at 03:01 #122869
DriverCurran
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If flood water is moving and likely to dislodge or has dislodged ballast - IMMEDIATE STOP ON ALL TRAFFIC.
Between the bottom of the formation and the bottom of the railhead - Normal running permitted subject to the above instruction
Between the bottom of the railhead and the top of the railhead - A maximum speed of 5 mph subject to the above instruction
Over the top of the railhead - STOP ON ALL TRAFFIC AND AWAIT INSTRUCTIONS FROM OPERATIONS CONTROL.

The above does include deliberate use of caps for emphasis on certain restrictions

Paul

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Flooding detection? 15/01/2020 at 10:10 #122871
headshot119
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There are flood detectors which are monitored by control, who will send a local person to check the site preemptively when it looks like it's heading towards a flood risk. There are also high risk sites with permanently installed pumps to move the water off of the track bed.

When there's severe rain / weather forecast it's all hands on deck, and various people will be out checking known risk sites, and doing what they can to keep the water away. Clearing drains, mobile pumps etc.

As a signaller you get to know the likely sites which will suffer in the wet weather, not that it changes how you'll deal with a track SOWC.

"CHECK Do you stop at Capenhurst?" - Opinions are my own and not those of my employer
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Flooding detection? 15/01/2020 at 11:12 #122872
WesternChampion
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Having looked it up, I now know that:

SOWC = shows occupied when clear

Could someone with the relevant permissions please add this to the glossary.

Thanks

Chris

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Flooding detection? 15/01/2020 at 11:17 #122873
headshot119
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WesternChampion in post 122872 said:
Having looked it up, I now know that:

SOWC = shows occupied when clear

Could someone with the relevant permissions please add this to the glossary.

Thanks

Chris
Done. SOWC

Also added SCWO (Showing Clear When Occupied) that's the bad one, no one likes them!

"CHECK Do you stop at Capenhurst?" - Opinions are my own and not those of my employer
Last edited: 15/01/2020 at 11:21 by headshot119
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