Deleted
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Post by Deleted on Jan 29, 2013 16:48:46 GMT
Anyone have any idea why the district line I took did the 'slow move forward, sudden brake and continue slowly moving procedure' today? What's it for anyway?
There were also about 4 tfl staff members at turnham green where we undertook the procedure after leaving. It was at about 16.37 to Ealing broadway scheduled to arrive there at about 16.50.
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Post by domh245 on Jan 29, 2013 16:55:46 GMT
To me that sounds like a stop and proceed (Passing a failed signal). But I'm not an expert, and TFL report no problems. Was it leaving the station or coming in?
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Post by norbitonflyer on Jan 29, 2013 17:04:37 GMT
When that happened to me once (on the bridge between Kew Gardens and Gunnersbury) the driver went to great lengths to explain what was going to happen. It was a signal stuck on red (reason unknown, track circuit failure probably), and the driver had to perform the "Stop and Proceed" rule.
Having stopped at the red signal, and presumably been advised by the signalman of the failure, he waits for a pre-set time, and then proceeds at caution ("drive on sight", like a tram) past the red signal. The sudden application of the brakes is, of course, caused by the tripcock being activated by the trainstop associated with the red signal. The driver then has to re-set the tripcock before continuing, still driving on sight (i.e at a speed slow enough to stop short of any obstruction), all the way to the next signal.
That's my layman's understanding of what the driver said, anyway.
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Post by Deleted on Jan 29, 2013 17:13:54 GMT
It was on the way out of turnham green. I thought it was something to do with the signals since I vaguely remember reading someone else asking on another forum.
Definitely one of those 'unexplained delays' since we just got an automated announcement saying it was done 'for safety reasons' and the driver floored it round from Ealing common to Ealing broadway... Still ended up about 5 minutes late though...
Oh well. Just curious what it was for. Anyone know what the exact issue was?
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Fahad
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Post by Fahad on Jan 29, 2013 20:10:35 GMT
District Dave once wrote about the stop and proceed procedure ("the rule") hereHe also, in great detail, defined the whole procedure here |
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Phil
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RIP 23-Oct-2018
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Post by Phil on Jan 30, 2013 10:46:05 GMT
saying it was done 'for safety reasons' Anyone know what the exact issue was? As already hinted at, this is the standard announcement for passing a (failed) signal at danger. The t/op has to go through a twenty-stage procedure (as per his rule book) - and yes, he is examined on his memory of all tewnty stages in the correct order since it's safety critical!! The announcement is part of that procedure. And once done the speed is electronically limited for a set time (depending on stock I believe) even if/when he's seen that the next signal is clear. After that - yup, (unofficially) 'floor it' to make up for the delay.....    . |
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Post by Deleted on Jan 30, 2013 15:30:19 GMT
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Post by Deleted on Jan 30, 2013 16:37:11 GMT
It's pretty much the same. The Service Controller can pass Authority from a Signal Operator via Secure Radio nowadays. LU no longer have Signal Post Telephones (bound to be left somewhere!) and when the Service Manager has authorised the procedure to take place there is no need to wait two minutes. Regarding the last procedure some staff do not realise this has to be properly authorised or that a form or secure message needs to be passed!
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Post by davethewomble on Feb 11, 2013 12:47:07 GMT
Reading through the procedures for passing signals at danger, 'Applying the rule' posted above, the phrase 'Secure the train' appears several times in the instructions to the operator.
What does it mean to 'secure the train'?
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Post by Deleted on Feb 11, 2013 12:59:40 GMT
Reading through the procedures for passing signals at danger, 'Applying the rule' posted above, the phrase 'Secure the train' appears several times in the instructions to the operator. What does it mean to 'secure the train'? Stop the train. Apply the brakes. As in the brake that will hold and prevent the train from moving (including rolling). Proper some say it means removing the control key AIUI |
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