On Sun, 26 Aug 2007, MIG wrote:

On Aug 26, 8:15 am, Mr Thant
wrote:
On Aug 26, 12:58 am, MIG wrote:

Are the proposals really going to increase Northern Line frequency by
25%?

That's what they say:

"Following the PPP Northern line upgrade, the line will operate 30tph
on the southern Morden to Kennington section, but the branches through
central London will be operating at only 22-25tph and will remain
crowded. The limit on capacity is the need to inter-work services to
different destinations via different branches. It is possible to
achieve higher frequencies and capacity using the existing
infrastructure if junction capacity limitations can be overcome.

"A segregation of services would deliver simpler service patterns on
the line. This will allow more trains to be run through both the West
End and City branches - enabling 30tph services on the central London
branches. This will provide roughly 25 per cent extra capacity and
crowding relief on these busy sections. With the core infrastructure
being capable of supporting these service patterns, the main
requirements are some additional trains (and stabling) and station
capacity improvements at Camden Town."

Well, it's all a bit smoke and mirrors and hypothetical. The
hypothetical increase in frequency will be down to the upgrade, not to
the service pattern changes, but they are suggesting that they won't be
able to take full advantage of the upgrade without the changes to the
service pattern.

Huh? It seems quite clear to me. The situation post-upgrade will be 22-25
tph on the branches; changing the service pattern will raise it to 30 tph.
I don't think you can say that 'increase in frequency will be down to the
upgrade' if the upgrade alone doesn't cause it!

tom

--
Also giving up smoking (cigarettes) today so apologies if it reads wierd
or I trail off into maddness at any point!! -- Agent D, 20051129