Platform doors

Never had a one under at a station with PEDs, platform overcrowding much less of a hazard, a lot less litter on the tracks, a lot less dust on the platforms.

Big problems retro fitting them onto platforms with big curves, very expensive and would mean shutting stations while they were installed so lots of disruption.

In Paris, Line 1 of the Metro is nearing the end of a programme to retro-fit PEDs to all platforms in readiness for the introduction of driverless trains. The PEDs are not as tall as those on the JLE, and have all their equipment under the platform (instead of having stuff above the door level). Having tested the process at a disused platform a couple of years ago, they have had a rolling programme of strengthening the platforms and installing the doors. The doors are installed as modules, with 18 modules per platforms and two modules installed per night. Stations are not closed for the installation work. Once each platform is completed and tested, the doors are made operational (even though the trains still have drivers); this gets the passengers used to them. Once the line is fully equipped, the rolling stock will be replaced by the driverless trains. Of course, this does mean that the old and new rolling stock has to have their doors in identical positions. More information here; it's in French, but there are a number of pictures and videos of the work.

I recently returned from Hong Kong where further work to retro-fit platform doors is continuing.
Stations at Heng Fa Chuen, Chai Wan, Kowloon Bay, Ngau Tau Kok, Kwun Tong, Kwai Fong, Kwai Hing and Tsuen Wan are getting half-height doors.

tinyurl.com/3tpovt9
tinyurl.com/3s3pts2 refers.

Although I am not a regular traveller on the Jubilee Line between Westminster and North Greenwich (the section in question), I don't mind the doors at all. In-fact they're pretty cool what with the sound they make when they open and close.



Do correct me if I'm wrong here, but I do believe the PEDs (Platform Edge Doors) were put in to save money. I don't know the full story about/behind this not-so-known fact but I understand it's true.



Sounds like you need to get on a certain website.... and submit a Freedom of Information request to Transport for London ("TfL")

Don’t suppose anyone knows how much it cost to convert Line 1 to driverless and install PEDs?

Ah Paris, where they understand the benefits of investing in the public transport system……

Actually, ah (insert name of town that isn't London), where they understand the benefits of investing in the public transport system………

We get the Boris bike, a bus so big you’d have trouble parking it in the Grand Canyon and a cable car from which you will be able to enjoy panoramic views of Canning Town.

The Hong Kong PEDs are there to make the station climate control much cheaper and more effective. Air conditioning on stations that's trying to cool the tunnels that are filled with hot air expelled from the trains isn't terribly effective. The PEDs allow the stations to be cooler - the heat from the gap between the PEDs and the train is very noticeable.

They do also allow the passengers to line up in a more orderly way! It feels slightly weird to be on a platform without PEDs in HK but even the open air platforms have blue strip lights that line up with the doors to show where to queue!

I remember reading somewhere that the PED on the Jubilee Line paid for themselves after a year. Though I can't remember where...

While a lot of actions are as much for show as anything the two examples you've quoted do have proven benefits. The PEDs do stop one-unders and do have benefits in terms of airflow, etc. Step edges with a contrasting colour are very beneficial for people with limited eyesight as it makes it much easier for them to see where the edge of the step is - if you've ever misjudged a step then you'll know how painful it can be, indeed if you're unlucky falling down stairs can be fatal.

The problem with curved platforms isn’t expense it’s the gap between train and platform, it would be quite easy for a passenger to fall between the train and the PEDs. I think someone mentioned on here there was a fatality on a curved platform with PEDs in Singapore.

I’m sure somewhere in a filing cabinet at 55 there is a study that could tell you how much it would cost to install PEDs on every station, along with one that put a price on straightening the Central Line platforms at Bank and Notting Hill Gate and the estimate to convert the Tube to driverless operation.

All three were read once, quickly put away and the reader went across the road to the Old Star for a very stiff brandy.

Your'e forgetting something else though, the main reason they installed them was for ventilation management purposes.
Basically, they prevent hot air, as well is other rubbish such as tunnel dust from being blown down the tunnels and onto the platform, in turn this also makes tunnel fires very unlikely to happen indeed.
Also if one unders were such a big part of it, they would have fitted them at West Ham, Canning Town etc...

Well it all depends upon your definition of straight! Don't forget that Finsbury Park Vic is not a straight platform with its well known hump. In order to have effective and safe PEDs at all tube stations I expect that a great deal of civil engineering would be necessary in the way of enabling works to achieve straight and level platforms. of course at some stations such as Waterloo and Embankment some major works would be required. I expect that it will happen in the future but long after those of us around today have shuffled off our mortal coils.

True enough but I would think the angle of the curve is important in terms of working clearances for moving doors and staggering the heights of the doors as suggested could involve 'steps' in inappropriate places or require special units. If bespoke was the objective then I'd expect a retrofit everywhere but standard is by far the best approach even if it would mean some major civil engineering.
On that score don't forget that platforms have been lowered, tunnels widened and other areas knocked about to allow new stock, UTS ticket offices, for H&S compliance etc etc.

Thinking out of the box I'd be looking to standardise the entire network in the future, station layout, rolling stock, signalling etc etc instead of the seemingly relentless diversification into all things new on a piecemeal basis. Standardisation reduces installation and maintenance costs and allows universal upgrading far more cheaply too.

I have probably been using these for longer than many of you here, because they have been built into the St Petersburg Metro in Russia for as long as I can remember. They are called the Horizontal Lift type of station, because you wait in the passage between the lines, and on each side there are what look like 24 lift doors (there are four doors to a carriage and six carriages), which open when the train comes just like the Jubilee Line. One difference is there are no windows, so you don't see the train arrive until the doors are opened, but you certainly hear it arriving behind the doors. Visitors sometimes can't understand it is actually the train platform there. They really do look like a long line of lift doors. Here
en.wikipedia.org/wiki/File:Moskovskaya_Peterburg_metrostation.jpg

Nice, to hear but i don't like these type of doors cause you don't get to see the trains exterior.

Btw, with PED's wouldn't it be more expensive when introducing new stock that has different carriage lengths and doors in different areas to the existing stock?

If they installed PED's in all tube stations now the space train's design might have to compromise and what about the S stock's doors.