John Rowland wrote:
"Aidan Stanger" wrote...
Gary Jenkins wrote:

As an alternative to a Bakerloo extension is it
feasible to hope for a Jubilee line branch from
North Greenwich in a south-easterly direction
towards Charlton. Eltham and Sidcup?

This would be great for Eltham, as an elongated
station (with travelators instead of escalators)
could serve both the station and the High Street.

While I can see the advantage of such a station, I can't think of any
station in London like that, so I doubt that the economics would add up.

Why would the economics not add up? They've done a similar thing with
Seven Sisters, but there it was close enough to use escalators.
Travelators probably do cost more than escalators, but they still exist
elsewhere on the Tube system, and they have the advantage of being
wheelchair accessible.

There are four possible reasons for no such stations having been
constructed yet:

1) They just didn't think of it.
2) Too expensive.
3) Local technical conditions prevent it.
4) No perceived need.

Considering how badly designed most of the new Jubilee stations are, I
would not consider LU's past decisions to be of much value for designing
future stations.