In article ,
Boltar wrote:
Obviously this is not the case, at least not for tube trains.
If any vehicle crumples up at such a low speed it doesn't say
a lot thats good about the design.

This is not my specialist subject, but surely it is the case
that the crumpling up makes them safer. Wasn't it the case that
a number of rail crashes a while back were made much worse
because the carriages were built off incompressible underframes
and so rode up violently in a collision?

--
Tony Bryer