Clive Coleman. wrote:
In message , Tom
Anderson writes
Makes sense. What's the advantage of conventional construction over
this, then?
The railway as laid down by Brunel wasn't level but sagged between
pillars down into the earth to prevent movement. Frequent sleepers
stop this and hold the gauge correctly.

Interesting. Was this true of all Brunel's broad gauge lines? That
would have meant that high(ish) speeds on broad gauge wouldn't have been
compatible with the comfort (and possibly the safety) of passengers. Do
you know if Brunel realised that later?
--
Richard J.
(to e-mail me, swap uk and yon in address)