On Fri, 16 Jan 2004 09:12:28 -0000, "Gunslinger"
wrote:

Presumably these stats all relate to surface sections. It would be
interesting to learn what the highest/average speeds are in the tunnelled
sections.

When the Vic line opened they claimed speeds of 50mph between Finsbury
Park and Seven Sisters. That must be near the top of the range for
in-tunnel tubes.