Boltar wrote:
On Sep 29, 7:59 pm, "Richard J."
wrote:
You can still see the original curve of the M4 just to the
north-east of the J8/9 roundabout.

You can see it quite clearly in google earth, it looks quite green.
Did they dig up the road surface or did they just let it return to
nature on its own? If the latter it says a lot about how long our
infrastructure wouldn't last if humanity suddenly vanished from the
planet

I'm pretty sure they dug it up. There are, after all, hurriedly
constructed runways on wartime airfields which are still there 60 years
later.
--
Richard J.
(to e-mail me, swap uk and yon in address)