Michael Bell wrote in message ...
John

Thank you for this and I look forward to your feedback.

There are several issues here. What you seem to be thinking of is
track condition monitoring.

1. Yes, I was looking at things from a track perspective, but then
that's my line.
2. I've re-read the thread. So I believe you're looking at
train-mounted equipment that monitors trains. Any abnormal behaviour
(sudden increases in angles between coaches, for eg) that would
indicate cars ahead derailing would initiate preventive measures.
Brakes on cars behind could then be applied to stop them and thus
prevent them derailing as well.
Have I got it right?
3. I've tried to find articles on derailment, no luck. But I have
located a book which will hopefully give me some info.

John