In article , Mait001
writes
Here's a new phenomenon: carrying out Underground track repairs whilst a train
is in service, which is deliberately held up for that purpose!
[...]
Can any of the more experienced aficianados of this site shed any light on this
curiosity?

I've certainly seen it before.

I recall a situation where there was a signal failure in a tube tunnel.
Fixing this basically meant checking each step of the circuit in turn,
with these being spread out through the tunnel. So the following process
was used:
- engineering staff boarded the cab at station A
- the train ran forward to the faulty signal and stopped
- the driver took the train forward slowly, tripping and then resetting
the trip
- the train ran forward to the next point where a check was needed
- the engineering staff got out and checked a couple of items, protected
by the stationary train
- the staff got back in and carried on to station B
- they then took a service train back to station A
and repeat until the problem is fixed.

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Clive D.W. Feather, writing for himself | Home:
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