In message
-septemb
er.org, at 08:00:18 on Sat, 23 May 2015, Recliner
remarked:
Roland Perry wrote:
In message , at
11:22:24 on Fri, 22 May 2015, Offramp remarked:
Tuffers was one of those stations that had a rather annoying
lift/escalator
characteristic.

The former is usually because there needs to be a mini concourse which
has access to both platforms, and it can't be any lower because the
tracks are in the way. I'll speculate that the latter is so that the
lift's machinery room can be at ground level.

Aye. That does make sense. But at stations such as the Claphams
North & Common,
at the bottom, platform end there is only one platform at the end of
the escalator,
and a flight of stairs to reach them.

Even with an island platform, the tracks would have to diverge in order
to fit around the bottom of escalators, and diverge enormously to get
past lift shafts and their circulating areas.

Were any of the island-platform stations originally built with
escalators? Angel had lifts, and the entrance was moved round the corner
during the rebuild to accommodate the horizontal reach of the new escalators.

If you mean island platform stations in a single platform tunnel, I very
much doubt that any had escalators.

Having a single platform tunnel constrains the running tracks to be very
close together, so there's no room for lift shafts between them, or if
rebuilt later the bottom of the escalator shaft.

Even if there are separate platform tunnels they are often quite close
together, because the original lines were mainly constrained to be under
the footprint of the roads above.

These were mainly Yerkes stations from
1906 or so, and those early Tube stations didn't have escalators.

There are stations like Green Park that now have escalators, but the
platforms are in separate tunnels.

--
Roland Perry