In message .com
"TheOneKEA" wrote:

Graeme Wall wrote:
Easy enough, prefabricate the thing alongside, close the road overnight
and swing the thing into position when ready. Not exactly rocket
science.

Ah, but no one has yet mentioned the fact that the M40 crosses the
formation _on_the_level_. The A40 does not, and still has the bridge
abutments to prove it, but the M40 apparently foes right over the
formation, and too closely to the A40 to allow for easy gradients.

So unless a horrific gradient was contemplated, the M40 would have to
be lowered to the same level as the A40, which would cost $WAY_TOO_MUCH.


AHBLC :-)

--
Graeme Wall
This address is not read, substitute trains for rail.
Transport Miscellany at http://www.greywall.demon.co.uk/rail/index.html