"Stephen Farrow" wrote in message

Alan (in Brussels) wrote:
"Nigel Pendse" a écrit dans le
message de ...

"Ian Jelf" wrote in message


In message , Tom
Anderson writes

Conversely, London never had the el-to-subway transition that
built a lot of the NYC system (there are one or two examples of
this happening in London, though).

I'll probably kick myself when you answer this.......but where are
there any examples of this happening in London?

How about where the District and Picc climb out of their subsurface
and deep level tunnels at Earl's Court to just below ground level at
Hammersmith and then up a steep gradient on to the viaduct by
Ravenscourt Park? Or where the Wimbledon Line climbs on to a quite
high viaduct in Fulham? And the Central west of White City?

In each of these cases, we have an Underground line climbing from a
tunnel to viaduct level, and staying at viaduct level for at least
a few stations.


Yes and no, because although those are indeed examples of what the
OP of the text meant, what he actually wrote (as he clarified
subsequently) referred to the construction of tunnels *to replace*
surface or elevated lines. The only cases I can think of are on the
Central Line between Stratford and Leyton, a short length of the NLR
North Woolwich branch and the Kingsway tram tunnel (at least
partly). In London, unlike NYC, there are several examples of the
opposite situation, eg parts of the DLR (Sivertown tramway) where
new elevated sections replace surface lines formerly serving the
docks...

Also on the DLR, the previously elevated Island Gardens was replaced
by an underground station when the line was extended across the
Thames to Greenwich and Lewisham (Mudchute, also, was originally an
elevated station, and
was rebuilt, though it is not now underground - it's just north of
the tunnel portal).

I know it's not exactly the same, but the replacement of High Holborn by
Thameslink means that commuter trains now tunnel under Ludgate Hill
rather than crossing over it (and obscuring the view of St Paul's in the
process). Of course, the Snow Hill tunnel had been there all along, but
had been abandoned for decades before being brought back into service
again.