"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...

Regards,

- Alan (in Brussels)