2010 Q6 Overlaying a Transmission Based signal system over a fixed Signal System

[ricky]

Hi All,

I have had a go at 2010 Q6 and would like some feedback. I'm a little unsure of the first part and could have probably done with a couple more points for the second part. I assume that for 10 marks they were hoping for 5 risks and 5 mitigations.

I know that at just short of 2 pages it is a little thin on the ground but I'm unsure of what I have missed.

Any feedback would be welcome.

Thanks

Rich

P.S. there doesn't seem to be much forum activity lately is everyone enjoying this little heat wave or is there always a lull this time of year?

[PJW]

Certainly will in a day or so; I hope you have some good ideas to help those trying to do something similar as a day job!

Two pages of typing probably equates to 3/4 sides of writing and therefore may be of suitable length for an exam answer.

You are right; it has been very quiet this year. The realisation that the exam applications need to be in soon and that exam preparation should actually have started some time ago may soon hit the student population. Perghaps all the UK people just want an excuse to stay well away from the Olympics.....

Hi All,

I have had a go at 2010 Q6 and would like some feedback. I'm a little unsure of the first part and could have probably done with a couple more points for the second part. I assume that for 10 marks they were hoping for 5 risks and 5 mitigations.

I know that at just short of 2 pages it is a little thin on the ground but I'm unsure of what I have missed.

Any feedback would be welcome.

Thanks

Rich

P.S. there doesn't seem to be much forum activity lately is everyone enjoying this little heat wave or is there always a lull this time of year?

[Jerry1237]

Rich,

I have had a quick read of the paper. At first glance, it seems to answer the questions but I would suggest at a level that is not deep enough to pass the exam.

There seems to be a contradiction on how DTG-R has been implemented in the real world and the limitations listed in the paper. Namely, two systems can, and do, run in parallel but it must be proven they do not contradict each other's movement authorities not decrease the level of safety.

The scenario in the paper is a gradual migration. Therefore, suggesting re-locking and re-controlling the infrastructure then fit the trains goes against what the question has asked - and would result in a closed railway for a not insignificant period. It is more probable that the trains would be dual fitted (tripcock on LU) and driven on lineside until all the trains (or sufficient to support the service) are fitted and then the TBCS would be switched on and lineside switched off in a traditional commissioning.

I would suggest that the examiners are looking for environmental testing, product approval, testing strategies etc. Some of these are discussed in the hazard section of the paper (EMC Interference doesn't make sense - but the term EMI would).

There is the bones of a good answer in the paper but I feel it would not pass simply because it doesn't answer the question.

Feel free to ask for further clarification and it would be good to see a resbumission of this paper following everyone's comments.