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Post by grahamhewett on Mar 13, 2018 12:49:34 GMT
Not sure whether this the right place to ask this question, but here goes. AIRI, the regulation point for the Bakerloo used to be Embankment, but yesterday, we were held at Piccadilly Circus for about 3 minutes (around 14.20) because there was an 8 min gap behind us (and at least 3 min in front of us). Has practice changed, or was this a oneoff?
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Post by superteacher on Mar 13, 2018 12:52:46 GMT
Not sure whether this the right place to ask this question, but here goes. AIRI, the regulation point for the Bakerloo used to be Embankment, but yesterday, we were held at Piccadilly Circus for about 3 minutes (around 14.20) because there was an 8 min gap behind us (and at least 3 min in front of us). Has practice changed, or was this a oneoff? Presumably on the instructions of the controller, any train can be regulated at any location according to the situation. |
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Post by scheduler on Mar 14, 2018 0:27:18 GMT
In theory anywhere with non-automatic signals is a good regulation point, because the signaller can hold the train at red, until the appropriate time.
Since Piccadilly Circus has a reversing shunt, I can make a pretty good bet on its signals not being automatic.
More to the point - what caused the Bakerloo to have an 8 minute gap in service when in the middle of a weekday it should be running a 3 minute service or better?
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Deleted
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Post by Deleted on Mar 14, 2018 0:32:15 GMT
In theory anywhere with non-automatic signals is a good regulation point, because the signaller can hold the train at red, until the appropriate time. Since Piccadilly Circus has a reversing shunt, I can make a pretty good bet on its signals not being automatic. More to the point - what caused the Bakerloo to have an 8 minute gap in service when in the middle of a weekday it should be running a 3 minute service or better? The southbound starting signal at Piccadilly Circus BP3 is indeed a semi you're right  You're also right that it's only a pretty good bet, there is not always a controlled starting signal if the line ahead is plain line, but it is common On the northbound (for some reason I kind of assumed southbound) you've got BP11 at the entrance to the platform and BP9 in advance of the trailing crossover. |
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hobbayne
RIP John Lennon and George Harrison
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Post by hobbayne on Mar 14, 2018 9:26:04 GMT
On the Central Line, a train can be regulated anywhere on the line, at any signal or without the driver being told to hold there by the line controller.
A held visual will illuminate on the drivers console and slowly tick down until it is time to depart.
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Post by dpr on Mar 15, 2018 21:04:45 GMT
Just to confirm, yes Piccadilly Circus is a controlled area and BP9, the station starter on the northbound, is the first signal in a platform the signallers can hold at red after the station starter at Lambeth North.
Also as mentioned, the controllers or signallers can hold a train wherever they wish over the radio. It's perhaps just a little more time consuming to do so.
As a side note, BP9 is an interesting signal in that it is beyond the points off the end of the platform, which means no train can reverse south to north with a train in the northbound platform.
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