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Post by raakone on Jun 5, 2008 18:58:00 GMT
Georges Vanier station in Montreal is presently closed. I've been through closed Tube stations when visiting London. So, a bit of comparisson...
a) speed...the tube trains slow down more than our Metro.
b) barriers....at the ground floor I couldn't see any difference in Georges Vanier. At closed tube stations, there was always at least a metal "fence" in the way of the platform.
c) our Metro driver did give a warning before leaving the stop before (Lucien l'Allier), but at the stop there was nothing, and the automatic announcement before Georges Vanier still played, the announcement "Georges Vanier" also played when we were about to "stop" there (which we didn't). When Regent's Park was closed and I passed through on the Bakerloo, there wasn't that problem.
Just thought a comparison may be interesting.
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Deleted
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Post by Deleted on Jun 5, 2008 21:10:04 GMT
On LU, the speed through a temporarily closed platform as a train passes the station starter signal must be no more than 5mph. It is to do with the amount of protection the station starting signal offers - because trains would generally pass it at a slow speed it has a shorter overlap than normal. Therefore when a station is closed, trains must be slowed down so that, if they *do* overrun a signal, the braking distance will still be short enough not to allow them into the next signalling section where a collision could occur.
Metal fences are generally there to protect workers from the train - and vice versa, since tools or material dropped onto the track could cause a derailment. Some platforms need this more than others.
I'm really not that good at explaining overlaps...
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Chris M
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Post by Chris M on Jun 5, 2008 21:17:12 GMT
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Tom
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Post by Tom on Jun 5, 2008 21:40:47 GMT
I'm really not that good at explaining overlaps... Nor am I - and I spent most of last summer calculating them! The short overlap is calculated for 35km/h based on the fact that the majority of trains are starting from rest and should a high speed SPAD occur it is highly unlikely that the previous train would have come to a stand just clear of the overlap. The rules for providing 35km/h overlaps state that you can have one as long as there is no train berth in the calculated full speed overlap of the same signal which is calculated on the assumption that a train has had a full speed approach to the signal. |
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Post by angelislington on Jun 5, 2008 21:48:40 GMT
Tom - do the kph calculations get messed up by the fact that the tube was originally designed in Imperial? Or is it relatively straightforward?
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Deleted
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Post by Deleted on Jun 5, 2008 23:10:24 GMT
I've never seen a metal fence. Sometimes I've passed through closed stations on the Northern Line - Old Street one engineering weekend, and Kings Cross St. Pancras on 8/7/05 spring to mind. I've often wondered if it is standard that the "Station Closed" sign is inside a map that opens so that the sign faces normal line traffic.
I've also occasionally passed through stations which had limited time - Chancery Lane and Temple were both normally closed on Sundays until quite recently, for example, and Cannon Street is only open at certain hours.
One strike day I remember several stations being closed - and one being unexpectedly open!
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Rich32
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Post by Rich32 on Jun 5, 2008 23:35:08 GMT
I've often wondered if it is standard that the "Station Closed" sign is inside a map that opens so that the sign faces normal line traffic. Indeed it is. |
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mrfs42
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Post by mrfs42 on Jun 5, 2008 23:59:34 GMT
Regent's Park had a metal fence in the recent closure; but then again it was closed for ages. Think Shepherds Bush has got one too.
On the other hand, I've got a Bakerloo timetable from the very early 30s that says something along the lines of any train non-stopping a station must not pass through in less than 20 seconds - this (I think) comes from before the days of system-wide reduced station starter overlaps.
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Chris M
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Post by Chris M on Jun 6, 2008 0:33:53 GMT
Regent's Park had a metal fence in the recent closure; but then again it was closed for ages. Think Shepherds Bush has got one too. Shepherd's Bush Central Line does indeed have a metal fence (well, it technically has two, one for each platform but that's getting pedantic). |
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Post by suncloud on Jun 6, 2008 9:31:57 GMT
I remember passing through Mile End Central Line there was a full wooden hoarding up while it was shut over a weekend once...
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Post by astock5000 on Jun 6, 2008 17:56:02 GMT
On LU, the speed through a temporarily closed platform as a train passes the station starter signal must be no more than 5mph. Does this also count for trains running not in service through any station? |
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Post by c5 on Jun 6, 2008 18:00:47 GMT
On LU, the speed through a temporarily closed platform as a train passes the station starter signal must be no more than 5mph. Does this also count for trains running not in service through any station? Yes. Any train. It is to do with the short overlap on the station starter. There are some expections, such as on the Met and the fast roads on the Picc between Acton and Hammersmith. |
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