Deleted
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Post by Deleted on Aug 22, 2016 21:25:50 GMT
If WK7 is cleared early, do you nevertheless get a yellow on WK7R, or does it simply show no aspect? Or do you get a green as you would expect, only the fine diagram on harsig's website seems to show no green aspect on WK7R? I've never experienced WK7 being cleared early before you round the curve, it's always red on approach so you only see yellow. Clearing early to us would be as we pass 700 rather than approaching WK7. I've never seen a green/green on WK7R/700, only a red or green/yellow, even when both platforms are empty Fair enough, that's very much what I'd imagined, but it's nice to have a chance to get it confirmed  I imagine they can, and also the TO can check and and possibly change at panel at bank. Thinking about it, it's possible that both routes are approach released given how little room for error there is at Bank, you want as much speed control as you can get away with don't you? It strikes me as likely that if the signaller called for the straight route at WK7 early it might very well not clear immediately anyway, but that's pure speculation on my part. |
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Post by drainrat on Aug 22, 2016 21:41:04 GMT
I imagine they can, and also the TO can check and and possibly change at panel at bank. Thinking about it, it's possible that both routes are approach released given how little room for error there is at Bank, you want as much speed control as you can get away with don't you? It strikes me as likely that if the signaller called for the straight route at WK7 early it might very well not clear immediately anyway, but that's pure speculation on my part. Depending on the route we can get 4 policemen into plat 8 or 3 into plat 7. So speed control is key, route locking would ensure it clears as soon as platform is empty and the approaching train is on the approach track. They often do it manually if the service starts to run late and they start using both platforms. Turnaround in peaks can be as little as 20 secs, also turning round in plat 8 adds 30 secs per reverser due to slow speed leaving the platform (15 kph), it creates blocking back into bank. |
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North End
Beneath Newington Causeway
Posts: 1,769
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Post by North End on Aug 22, 2016 22:59:43 GMT
I've never experienced WK7 being cleared early before you round the curve, it's always red on approach so you only see yellow. Clearing early to us would be as we pass 700 rather than approaching WK7. I've never seen a green/green on WK7R/700, only a red or green/yellow, even when both platforms are empty Fair enough, that's very much what I'd imagined, but it's nice to have a chance to get it confirmed I imagine they can, and also the TO can check and and possibly change at panel at bank. Thinking about it, it's possible that both routes are approach released given how little room for error there is at Bank, you want as much speed control as you can get away with don't you? It strikes me as likely that if the signaller called for the straight route at WK7 early it might very well not clear immediately anyway, but that's pure speculation on my part. As far as I can tell, WK7 is always approach-cleared, and will never clear until the train has passed WK700. However, I can't see any speed control on WK7, and it appears WK700 will clear without speed-control if either route from WK7 has been selected. So, if correct, with the route set all the way into either platform the driver will see: 1) WK700 showing green over yellow, with WK7 at red. 2) Once the train passes WK700, WK7 will clear straight away for either route. If no route is set into Bank, the driver will see: 1) WK700 showing red, which will clear to green over yellow subject to the timing conditions being satisfied. 2) WK7 will clear when the route is set. Does this sound right? |
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Post by drainrat on Aug 23, 2016 13:38:43 GMT
Fair enough, that's very much what I'd imagined, but it's nice to have a chance to get it confirmed Thinking about it, it's possible that both routes are approach released given how little room for error there is at Bank, you want as much speed control as you can get away with don't you? It strikes me as likely that if the signaller called for the straight route at WK7 early it might very well not clear immediately anyway, but that's pure speculation on my part. As far as I can tell, WK7 is always approach-cleared, and will never clear until the train has passed WK700. However, I can't see any speed control on WK7, and it appears WK700 will clear without speed-control if either route from WK7 has been selected. So, if correct, with the route set all the way into either platform the driver will see: 1) WK700 showing green over yellow, with WK7 at red. 2) Once the train passes WK700, WK7 will clear straight away for either route. If no route is set into Bank, the driver will see: 1) WK700 showing red, which will clear to green over yellow subject to the timing conditions being satisfied. 2) WK7 will clear when the route is set. Does this sound right? Yes, that's right |
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