TSPEED value in 10-character TRUST id.

[Mark Withall]

Hi all,

I'm wondering if it is possible to generate the 10-character unique TRUST identity in advance.

9 of the characters are from readily accessible information (headcode, origin location/time, day of the month). The 7th character, however, is the train status code (TSPEED).

The documentation doesn't appear to have enough information to determine, in advance, which precise value a train will be allocated in TRUST.

Does anyone have any more detail on how to determine the TSPEED value for a train?

Thanks,

Mark

[Peter Hicks]

Hi Mark

You can't reliably predict the TSPEED value 100% of the time I'm afraid - you can maybe get 99.5% accuracy, but you're likely to fail quite drastically under certain conditions.

TRUST has an algorithm which sets the TSPEED to N, and then O, if there's already a train called with the TSPEED of M which starts from the same STANOX at the same time.  Trying to replicate this algorithm will be at best tricky.

One example: last Tuesday, for example, three 2D06s were due to leave from an origin in STANOX 'area' (not sure if that's quite the right term) 88xxx and were called thus:

03:26:46 W81375 - 0526 Gravesend - Charing Cross as 882D06M518

03:40:47 W81379 - 0540 Orpington - London Victoria as 882D06N518

03:42:46 L05097 - 0542 Hastings - Eastbourne as 882D06O518

If schedule L05097 is manually called at 0310 so it can be cancelled from origin, then it will have a TSPEED of M, and the other two N and O.  Or, if it were manually called at 0330, it would have a TSPEED of N.

There are some other instances too which I'd have to look up.  Of course, it's up to you whether you want to try to re-implement the algorithm - only you know what the impact of getting it wrong will be.

Peter

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[Mark Withall]

Thanks Peter.

I had a suspicion that it wouldn't be straightforward. It's interesting to know more detail though.

Regards,

Mark