On Aug 23, 10:12 am, "Richard J." wrote:
Boltar wrote:
On Aug 22, 9:42 pm, "John Rowland"
wrote:
Haven't you just answered your own question?

No. If it was a signal failure why couldn't the trains still run?

Because there's only one signalling system. It's the usual LU fixed-block
system; there isn't an independent system for ATO, as you seem to think.
There's a good description of how the Victoria Line works on the Tubeprune
site athttp://www.trainweb.org/tubeprune/Victoria%20Line%20ATO.htm

Interesting site , but it doesn't explain how the ATO and ATP are
seperate if they both rely on the track codes.

B2003