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Tomnick's latest activity
T
Tomnick
replied to the thread
Stonehaven Signalling Observation - Question
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Rushing to put signals back behind a train is a sure fire way of putting the section signal back too soon. Once the home signal's back...
11 Apr 2024
T
Tomnick
replied to the thread
Definition of absolute block signalling
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The main focus is, sensibly, on the signal indications themselves and the implications for drivers. There's relatively little emphasis...
10 Apr 2024
T
Tomnick
replied to the thread
Facing point locks
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Anywhere that I've ever come across with such an arrangement, it's been provided for all signalled moves – indeed, it's far more common...
3 Apr 2024
T
Tomnick
replied to the thread
Facing point locks
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This isn't correct – a mechanical set of points will often, if not always, have mechanical detectors in the wire run for any semaphore...
3 Apr 2024
T
Tomnick
replied to the thread
Facing point locks
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If the points that become facing are mechanical, and have no electrical detection, how do you know that they've responded to the lever...
3 Apr 2024
T
Tomnick
replied to the thread
Two trains on single track
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It's on the Loop Line, all in tunnel, and presumably reflects London Underground practice. There are some repeaters, but not all stop...
3 Apr 2024
T
Tomnick
replied to the thread
Two trains on single track
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Yes, absolutely. I think we all agree on that. The misconception is that that means that it's Absolute Block, and it's a common...
2 Apr 2024
T
Tomnick
replied to the thread
Two trains on single track
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Greenford is one such location! Swinderby, too.
1 Apr 2024
T
Tomnick
replied to the thread
Two trains on single track
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It shouldn't be – it *really* shouldn't be. The presence of semaphores does not equate to Absolute Block. You can have AB without...
1 Apr 2024
T
Tomnick
replied to the thread
Two trains on single track
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Greenford isn't worked under AB regs in any direction, though. On the other hand, the vast majority of boxes that *do* work AB have at...
1 Apr 2024
T
Tomnick
replied to the thread
Hope Valley Capacity Scheme updates
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Yes, I see what you mean, and you're right. In this case, the TPE would surely have closed the gap enforced by the Chinley - Edale...
29 Mar 2024
T
Tomnick
replied to the thread
Hope Valley Capacity Scheme updates
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The distant signals over the Hope Valley now are all either: - Existing distant signals in the AB territory from Earles westwards. This...
29 Mar 2024
T
Tomnick
replied to the thread
Two trains on single track
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Doesn't mean that it's not under Absolute Block regs (which I think it is, albeit somewhat muddied by the fact that it works TCB in one...
29 Mar 2024
T
Tomnick
replied to the thread
New Mills Central landslip - 6 week closure
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Worth noting that there's been a significant, very noticeable dip in the Down line at that location for years – it's obviously got...
28 Mar 2024
T
Tomnick
replied to the thread
Hope Valley Capacity Scheme updates
.
The longest section on the approach is Chinley to Edale, which is only a mile or so longer than the length of Cowburn Tunnel – so, even...
28 Mar 2024
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