In message , at 00:19:07 on
Mon, 18 Apr 2011, Charles Ellson remarked:

In this evening's news it seems "that somebody must be done" and that
the existence of scrapyards under railway lines is to be investigated
(but no mention of various other businesses possessing inflammable or
explosive substances under hundreds of railway arches).

From a structural engineering point of view it makes quite a difference
whether the railway is on a brick built viaduct or a reinforced concrete
flyover.

In this case the motorway is a concrete construction and the railway is
an earth embankment. I'm pretty sure this is the scrapyard in question:
http://www.panoramio.com/photo/8017358

What I can't quite follow with the M1 closure is why they can't allow
cars and not lorries, and set up a speed restriction. Or do they think
it would be too difficult to enforce?
--
Roland Perry