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Post by zcap on Dec 11, 2017 1:58:47 GMT
Hey all,
Only a simple one tonight.
Does anyone know for certain when yellow lines on platforms became a thing on Underground Stations? And in fact, why they were introduced?
Its been picking away at me and I haven't really been able to find anything concrete, only that it must've happened some time in the very late 90's early 2000's (which is vaguely what I seem to recall from some very early memories), but ive always wondered when and why they were introduced.
Thanks in advance,
zcap
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Post by superteacher on Dec 11, 2017 8:35:09 GMT
I’m thinking late 90s too.
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class411
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Post by class411 on Dec 11, 2017 10:01:09 GMT
If everybody stood behind the yellow lines until the front of the train had passed them it would make accidental one unders prior to embarkation very unlikely (I don't suppose it's very prevalent anyway but the safety elf is a very zealous little chap).
Of course, once the train has stopped it would be helpful if people, as far as possible, moved to stand next to the train, at the sides of the doors to allow optimum egress.
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slugabed
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Post by slugabed on Dec 11, 2017 10:08:09 GMT
My recollection (which may be flawed,correct me if so)
They first appeared a few years after the introduction of HSTs on stations in the West Country,after a number of "incidents" caused by the draught of the trains passing at full speed.
They spread around the BR network,particularly in the areas still served by slam-door stock,in the 90s
They came,as you suggest,to the uUnderground around the year 2000.
I wonder if there was legislation/a recommendation after an accident,to make their spread so rapid?
PS:If I stand behind the yellow line "At All Times"...how do I get onto the train...?
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Post by norbitonflyer on Dec 11, 2017 12:52:18 GMT
My recollection (which may be flawed,correct me if so) They first appeared a few years after the introduction of HSTs on stations in the West Country,after a number of "incidents" caused by the draught of the trains passing at full speed. If I recall, an HST slipstream also blew out a wall on the footbridge at Stevenage, not to mention several incidents in the early days of damaged carriage windows when two HSTs passed each other at a closing speed of Mach 0.33. This is, I believe, the reason for the 100mph speed limit through Stoke Tunnel on the ECML (and probably others), where the bow wave effect was particularly concentrated. (The idea of being required to slow down on reaching Stoke Summit would have been incredible in the days of steam - and slowing down to 100mph would be beyond comprehension !) |
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Post by Deleted on Dec 11, 2017 16:29:04 GMT
Surely, "behind" the yellow line is on the track side of it from the passenger perspective?!
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Post by superteacher on Dec 11, 2017 17:41:32 GMT
I know we joke about pedantry sometimes, but let's not let this thread get hijacked by discussing what "behind the line" really means.
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Post by Jerome H on Dec 11, 2017 23:52:14 GMT
How wide is the distance between the yellow line and the edge of the platform on most LU platforms? Can such a small distance be considered such a crucial safety feature? Or does it serve more as a level of reassurance for the drivers, who have a little more chance of reacting if someone is over the line, rather than the edge of platform?
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Chris M
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Post by Chris M on Dec 12, 2017 0:27:24 GMT
The gap is there to enable the drivers and/or platform dispatchers to see that there is nobody and nothing trapped in the doors, leaning on the train, etc. and to stop people getting hit by the train as it arrives. Also don't underestimate the turbulence of the air around a moving tube train, especially following it - see the report into the derailment between Mile End and Bethnal Green for example. |
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Post by zcap on Dec 12, 2017 2:37:02 GMT
They spread around the BR network,particularly in the areas still served by slam-door stock,in the 90s And the legacy of the slam door era yellow lines still lives on today, in the South... For example, Woolwich Arsenal, with a graciously low line speed of 20Mph through it; one cant help but notice the massive distance between the edge of the platform and the yellow line. One would expect a HST to be passing through at 125Mph if they saw that gap, only to be greeted by a sweet Networker (or occasionally a Class 376, and very soon Ufos.. I mean, 700s), crawling into the station as if it was trying to sneak up on you. I guess some poor fella musta got it bad from a 415 once upon a time, im sure getting hit by those doors was more than just a headache.  Nontheless, pulling it back the initial question of interest, was there any reason for its apparently rapid application? As far as memory and pictures are concerned, one may as well claim it was an overnight phenomenon. |
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Post by philthetube on Dec 12, 2017 2:40:44 GMT
The yellow lines are in the process of being moved closer to the platform edge, initially they were about 15 inches from the platform edge but were then moved closer to the edge. The reason being that when they were further away people were using the platform edge as a thoroughfare, when that gap was narrower they were unable to do that. An interesting case of what appears to be the safest system not being so.
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