(20-05-2015, 01:35 PM)asrisaku Wrote: Hi Dorothy

Please let me try part a.

For part a of my attempt:
I would think of lack of check rails on the sharp curve resulting in train derailment. I read the document in RAIB and one accident occurred on the sharp curve without check rail installation.

Mechanic parts such as a brackets untied with a switch rail and it leads to train derailment. So maintenance team needs to often checked such as visual inspection, greasing etc. There is an accident called grayrigg derailment because of that issue.

Another issue would be new wheel profile on the train resulting in friction between stock rail and wheel flange. Finally it leads to an accident.

Any comment from my understanding?

Best regards
Arnut

(20-05-2015, 02:14 PM)dorothy.pipet Wrote:

(20-05-2015, 01:35 PM)asrisaku Wrote: Hi Dorothy

Please let me try part a.

For part a of my attempt:
I would think of lack of check rails on the sharp curve resulting in train derailment. I read the document in RAIB and one accident occurred on the sharp curve without check rail installation.

Mechanic parts such as a brackets untied with a switch rail and it leads to train derailment. So maintenance team needs to often checked such as visual inspection, greasing etc. There is an accident called grayrigg derailment because of that issue.

Another issue would be new wheel profile on the train resulting in friction between stock rail and wheel flange. Finally it leads to an accident.

Any comment from my understanding?

Best regards
Arnut

I'm only a student myself, as you know, but here is my thinking:

The question asks about a lineside signalling system, so for me I don't see how check rails and wheel-rail friction fit into that description. Your 3 instances are good examples of causes of derailment but can you explain how a signalling system would contribute to the prevention of these derailments.

Bear in mind also that the second part asks how ATP would reduce the risk.