On Wed, 13 Jun 2007, Mr Thant wrote:

On Jun 13, 3:02 pm, Tom Anderson wrote:

But presumably, that does mean that out in the suburbs, where the
lines/branches go their separate ways, the frequency really is down to 6-8
tph. There are places where that's the case in London [...] too, although it's
rare

On the SSL, the service on the Watford, Richmond, Ealing Broadway
(District), and Hammermisth (H&C) branches is 7tph.

Watford and Richmond are the kind of fringey case i was thinking of.
Ealing Broadway also has at least 9 tph of Central line trains.
Hammersmith, though, is an excellent example, and one i'd forgotten about;
a fairly central area with a low frequency service even in the peaks, and
without another service along the same tracks.

The tube lines I'm not sure about, but you don't have to go that far out
to find 10 tph frequencies, especially in the middle of the day.

You know, what we need is a map which shows lines with their frequencies
somehow.

tom

--
intelligence, purity, the potential freedom of space, and the potential
aesthetics of mathematical computations