Tom Anderson wrote:
On 22 Dec 2004, Alistair Bell wrote:


Tom Anderson wrote:


Right, but they've got two places to do it, one on either side of the
platform, which means you can have one train pulling out as another
arrives, which you can't with a single-faced platform.

Except that unless my memory fails me, you can't actually do that at
Tower Gateway, as Royal Mint Street Junction is single-lead and not too
far off the platform ends. (So you'd get a very small improvement but
not much of one.)


True. I tried to work it out exactly, but the maths makes my head hurt.

I've discovered some extra useful information, to do with the DLR
capacity enhancement which reduces the island platform to a single large
platform:

"The removal of a platform from Tower Gateway was unfortunate, because
temporary closures of Bank would put pressure on the single platform. If
Bank closed temporarily, 15 trains an hour could be turned round because
of track alterations outside the station, or trains could be turned at
Shadwell. There would be a holding track outside the station for failed
trains."
(from this PDF document: http://www.ltuc.org.uk/get_document.php?id=1613)


--
Dave Arquati
Imperial College, SW7
www.alwaystouchout.com - transport projects in London