Boltar wrote:
On Jan 30, 10:30 pm, Stuart wrote:
Boltar wrote:
I've noticed the victoria line seems to be much warmer than the other
lines these days (or maybe it always has been but I've not noticed).
Is this because the trains are more frequent , or they use up more
energy on ATO , or the tunnel ventilation isn't so good , or is there
some other reason?
Always has been hotter (well as long as i've been travelling on it).

I've asked this before on here, the answer i got was that it's to do
with the fact that the Vic line is completely underground and so the
trains don't have any fresh air to cool off in except when they go to
the depot.


I'm not convinced its because its completely underground. After all
the northern line is underground all the way from mordon to east
finchley and golders green. Quite long enough for the tunnels to build
up huge amounts of heat

On a cold winter's morning, the southbound Picc trains arriving at
Finsbury Park are often still really cold to the touch, even though
they've been below ground a few stops, so I think just having ANY amount
of open air section would have a significant effect on lowering the
temperature.