London Banter - View Single Post - Proposal - every Tube ticket office to close by 2015

Roland Perry · December 10th 13, 06:15 PM posted to uk.transport.london

In message , at 10:56:36
on Tue, 10 Dec 2013, remarked:
aiui the trains are no longer interoperable, even if once upon a time
they were delivered from the same production line.

What are the major differences now (other than the interior decor)?

aiui, Central has a degree of automatic operation, and a higher 4th
rail.

Depends which you think is the fourth rail. The outside (positive) rail is
the higher one and that is commonly the third.

I was under the impression that the centre rail was both the "fourth"
and the one which was higher than normal.
--
Roland Perry