Ask the Tubeman

[Tubeman]

Originally Posted by MiaM

What would the problem with platform doors on a non-straight platform be?

The gap between the train and the platform will be there regardless of if there are any platform doors or not. The curvation of the platform is certainly even enough that platform doors formed to the platform edge can slide away.

Is the problem that someone might be trapped between the platform doors and the trains doors when they are closing? That must surely be detectable either by CCTV cameras or some kind of clearance/prescence detector?

That's the main issue; at Bank Central Line, Embankment Northern Line northbound, etc, due to the 'throw' of cars rounding the curve at some sets of doors a person could easily fall between train and PED screen, but would be potentially shielded from view of the driver's CCTV by the PED screen. You could have the horrific notion of someone being trapped between PED screen and train, which is a pretty unpleasant death.

Of course technology could be introduced to overcome this, but each new layer of detection system is an added potential fault which could cause delays (and adds to cost)

[MiaM]

What happends if someone falls down the gap at a curved station today? Is that easily visible on the drivers CCTV system?


A bonus question: Old-fashion analogue CCTV system can probably never fail in a "freeze picture" style. Is there any special considerations done to make sure that frozen picture don't happend on modern CCTV systems?

[Tubeman]

Originally Posted by MiaM

What happends if someone falls down the gap at a curved station today? Is that easily visible on the drivers CCTV system?

Unless they're very small and manage to completely fall down the gap, then yes.

Originally Posted by MiaM

A bonus question: Old-fashion analogue CCTV system can probably never fail in a "freeze picture" style. Is there any special considerations done to make sure that frozen picture don't happend on modern CCTV systems?

I'm not sure, but it's not a failure mode I've ever heard of with our equipment.

Bearing in mind a driver is watching as their train departs from a platform, it would be pretty obvious if the image has frozen (the train wouldn't be moving!)

[CityCat]

Originally Posted by Tubeman

That's the main issue; at Bank Central Line, Embankment Northern Line northbound, etc, due to the 'throw' of cars rounding the curve at some sets of doors a person could easily fall between train and PED screen, but would be potentially shielded from view of the driver's CCTV by the PED screen. You could have the horrific notion of someone being trapped between PED screen and train, which is a pretty unpleasant death.

Of course technology could be introduced to overcome this, but each new layer of detection system is an added potential fault which could cause delays (and adds to cost)

Someone getting trapped between PED and train leading to a pretty unpleasant death also causes delay (and adds to cost).

[trainrover]

Following this 13-Dec-2010 :

Originally Posted by trainrover

news like this here televised report (warning: has some disturbing images -- same Lexington-Ave station featured)

clickable...

this 19-Jan-2011 updating :

Man Crushed By 4 Train To Sue MTA

[Dobbo]

Exciting morning on the Bakerloo...

[trainrover]

The Central Line being converted to ATO is news to me

[Tubeman]

Originally Posted by trainrover

The Central Line being converted to ATO is news to me

It's old news... 15 years old!

[Tubeman]

Originally Posted by Dobbo

Exciting morning on the Bakerloo...

Yes it made last night on the Jubilee pale into insignificance...

We had a customer die on a train at Stanmore, a person under a train at Finchley Road (admittedly on the Met Line), a defective train at North Greenwich and a signalling problem between Neasden and Wembley Park all at the same time... that's what happens when I work lates!

[cpwken]

Hi Tubeman

Pulling into Ealing Broadway yesterday reminded me of something I've wondered about before.

How come the Central Line platforms are south of the District Line platforms, when for the rest of the route through west London the Central is north of the District?

I guess that as the District is older the gap between the mainline and District platforms was the only available space at the station?

However, that just raises the question why the District is also north of the mainline!

Do you know?

[Tubeman]

Originally Posted by cpwken

Hi Tubeman

Pulling into Ealing Broadway yesterday reminded me of something I've wondered about before.

How come the Central Line platforms are south of the District Line platforms, when for the rest of the route through west London the Central is north of the District?

I guess that as the District is older the gap between the mainline and District platforms was the only available space at the station?

However, that just raises the question why the District is also north of the mainline!

Do you know?

The Central Line platforms are on the site of the original District Railway terminus... quite simply when the Central Line reached there in 1920, a new District Line terminus with the current trainshed was built to the north of the original.

The Central Line all the way from Wood Lane (just south of the current White City) to Ealing Broadway was built by the GWR and was originally a goods-only route from the West London Line at Viaduct Junction to a point east of Ealing Broadway. The Central Line runs parallel to the GWR main line from where the original goods route and main line merged, so it follows that the Central Line terminus would be adjacent to the GWR station.

I guess the question really is why the District Railway decided its Ealing Broadway route needed to cross over the GWR main line and have its terminus on the north side of Ealing Broadway station. I suspect the answer is simply that the northern pair of GWR tracks are the 'slow' lines, and this therefore allowed District trains to run west to Slough & Windsor without crossing the southern 'fast' lines on the level.

[cpwken]

Originally Posted by Tubeman

I suspect the answer is simply that the northern pair of GWR tracks are the 'slow' lines, and this therefore allowed District trains to run west to Slough & Windsor without crossing the southern 'fast' lines on the level.

Makes sense. I thougth possibly it wasdue to a lack of available land south of the mainline, it's quite close to Uxbridge road.

Anyway, thanks for the very comprehensive answer, I'm duly impressed!

[Woonsocket54]

This is ridiculous....LU map is selling itself to the Arabs



http://www.economist.com/node/21554260

[sotonsi]

The folded paper tube maps used to be sponsored by Yellow Pages, with adverts front and back - was that not OK? after all Yellow Pages was British.

My Oyster card plastic wallet is IKEA branded, as they paid to sponsor those - are the Swedes OK, or is it just Arabs that you don't like?

And there's advertising all over the tube - they whore out the trains, the walls of the station, etc. Is that not OK?

The LU map isn't selling itself to the Arabs, just that a line on the tube map is sponsored by them - Emirates agreed to pay millions to sponsor the cable car to get it built in time for the Olympics (though TfL themselves had to pay way more than they were going to to get it built by the Olympics).

[MiaM]

How about democracy and human rights in Brittain, Sweden and the Emirates?

[Tubeman]

Not for this thread thank you

[Highcliff]

Tubeman
I have realized the elevated ways aren't very tall, they are low, around 15feet...Why?
Are they projected for low impact in the urban landscape?
What are under the elevated ways? Soil? Empty? Is there any use the space under the elevated ways?

Look at the example of a tall elevated way...What do you think about? London doesn´t have elevated ways at the same high, does it?

Originally Posted by mopc

New Line 10/2 Tamanduateí Station pics (opened last Tuesday) by Eduardo GJF

[ill tonkso]

Dollis Brook is the highest point on the Tube.

image hosted on flickr
It also - from that picture - doesn't look like it is in London, but it is.

The London Overground has this too.

image hosted on flickr


Then the DLR runs a lot on this.



It's a shame the DLR is so ugly (subjective I admit) though. I understand that the DLR was built very cheaply and is a fantastic piece of infrastructure in its own right, but cold concrete just doesn't capture the imagination like Cast Iron or Brick. But I guess a Brick viaduct was hardly an affordable option. The DLR lacks 'statement' that the older railways have. It has its moments, granted. Canary Wharf DLR is an impressive space, as is Heron Quays, but the rest of it lacks any real character. I feel the same way about the Shepherds Bush stations on the Sub-Surface lines too.

[Highcliff]

Hi, ill tonkso
The DLR was built very cheaply...but was there lack of money to build a nicer and very well project for DLR? Do you think the DLR could be underground, not elevated?

In DLR what was made under the elevated? Is there parking lot?

[ill tonkso]

Roads mainly. It wasnt a lack of money issue, more of a build what we can.