Platform Barriers

[Chris W]

The THREAD districtdave.proboards39.com/index.cgi?board=offtopic&action=display&thread=1191539580 got me thinking & wondering (a dangerous hobby of mine).... WHY WERE PLATFORM BARRIERS ERECTED ON THE JUBILEE LINE EXTENSION??

Unless LU/TfL feel the need to protect drunks from wondering into the tunnels to stagger home via the tunnels as opposed to waiting for the next train or from falling between cars what are they there for....??

If they're an important H&S feature (e.g. fire regs with respect to the air movement) they should be erected at every applicable station otherwise IMO get rid of them.

Anyone??? - or have I missed something

[Deleted]

They're thereas they were found to be the best solution the controlling the air flow. They had considered other ideas such as tapering tunnels at station but the PEDs were found to be the best solution. The safety side effect was a positive side effect.

As for why they aren't on every station, well it costs £1m a platform so I don't see them being installed any time soon. But for reference Crossrail is going to have them as standard on all underground stations. Maybe we'll see them added to more line after the station refurbishment. I has been suggest the underground island platforms on the Northern would be an alternate to rebuilding the station.

[Deleted]

also, the other thing to bear in mind, is that once the edge doors are installed the door layout of all the rolling stock has to be the same. Installing in on any other tube line except the Northern or Central would be stupid at the moment as new trains are going to arriving in the next decade.

[trc666]

Might be a daft question, but why weren't PEDs installed from Canning Town to Stratford?

[Deleted]

Installing PEDs overground brings problems with the machines not getting along with the British weather too well. Maintance on them would be a nightmare if the elements got into them. This would mean the above ground stations would experience door failure on a much more regular basis than the underground stations.

[Deleted]

Plus, there's no need to manage airflow in open-air stations.

There is also the fact that if TfL came out and stated that the PEDs are there to protect people from themselves on the platforms, the HSE would have forced all sorts of additional requirements on TfL's use of the things...

[Deleted]

mackenzieblu said:

Installing PEDs overground brings problems with the machines not getting along with the British weather too well. Maintance on them would be a nightmare if the elements got into them. This would mean the above ground stations would experience door failure on a much more regular basis than the underground stations.

Half height platform edge gates seem to cope with the Japanese weather, which can be more extreme than the British weather!

[Colin]

That may well be the case (Japanesse system), but cost also plays a part. At £1m per station (and obviously more for curved platforms), it can't be justified and won't happen.

[Deleted]

stephenk said:

mackenzieblu said:

Installing PEDs overground brings problems with the machines not getting along with the British weather too well. Maintance on them would be a nightmare if the elements got into them. This would mean the above ground stations would experience door failure on a much more regular basis than the underground stations.

Half height platform edge gates seem to cope with the Japanese weather, which can be more extreme than the British weather!

The only reason for Japanese gates handling fine is because they are sheltered, no?

[Deleted]

axewielder said:

stephenk said:

Half height platform edge gates seem to cope with the Japanese weather, which can be more extreme than the British weather!

The only reason for Japanese gates handling fine is because they are sheltered, no?

There are platform canopies over the platform, but that doesn't protect them from horizontal driving rain, snow, cold temperatures, humidity, and direct sunlight (earlier and later in day).