Re: Pavement Testing Facility - ignored?
...quite a few motorways in the UK still use concrete...
It could simply be a case of not wanting to rip something out while it's still got some life in it.
When the motorway was built I'm sure concrete seemed like a good idea, that fact it's still there now says that it wasn't a completely terrible idea. Who knows though, maybe concrete was chosen because it has better wear characteristics over tarmac. That would seem plausible as it's much harder and the motorway you picked as an example gets an usually large amount of traffic. I seem to remember that the M25 is largely built over poor ground as well. Perhaps ground conditions require a stiffer material than tarmac. One size does not always fit all.
Biting the hand that feeds IT
