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| Huddersfield control 10/09/2023 at 14:42 #153281 | |
OJH
8 posts |
I think I already know the answer but thought I'd ask as it is a bit of an oddity on the Brighton sim. You can set a call-on route from T348 signal to T340 (an auto signal) - usually you find them set between two controlled signals. Huddersfield control is enforced on all other call-on routes on the panel (i.e. no route can be set beyond the exit signal), even on signal T338 across the platform, but obviously this works on the basis of routes set and not the aspect of the signal, allowing T340 to be called-on up to while it is off. Am I right in thinking that: (a) Huddersfield control is effectively an extra safety feature, and if it's not present then the signaller does not need to (according to the rulebook, say) maintain the exit signal at danger, (b) therefore while you could keep T340 at danger through the emergency replacement switch, you don't need to (and I don't know whether these are proved on TBASC, so it might not even be safe enough)? Incidentally, as Huddersfield control is present on all other signals into Haywards Heath, was it not judged that joining trains on P3 need the extra protection - or was the idea that trains would most often be booked to join on the loop platforms? I expect the answer will be that this is just one of those things, with no real answer, but I thought it was an interesting quirk. Log in to reply |
| Huddersfield control 10/09/2023 at 21:15 #153284 | |
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clive
2781 posts |
Huddersfield Control exists to prevent read-through. Presumably someone did a risk assessment and decided that the chance of read-through here was low enough that making T340 controlled couldn't be justified. If it was controlled, the signallers would want an auto button so as to avoid the extra workload and then they'd have to remember to pull it in time to allow the joining move to be signalled without putting the signal back in front of the front train. It may also be that this platform is only permissive for joining moves. If so, then any driver getting a sub is already expecting to stop behind the front train and won't care what aspect the departure signal is showing. That's very different from the original Stafford situation where (I believe) the rear train wasn't specifically booked to share a platform. Joining-only is a far lower risk situation. Log in to reply The following user said thank you: TUT |
| Huddersfield control 11/09/2023 at 08:55 #153286 | |
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OJH
8 posts |
Very interesting, thanks very much.
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