The NSL sign means 70mph on motorways and dual carridgeways, 60mph everywhere else (unless a lower limit is enforced). And unless your driving a wagon or towing etc....Although its some years since i last read the Highway Code
There's a village on the A153 near Cadwell that has a large sign stating "Maximum speed 40mph" or very similar. There are no normal speed limit signs (red circle, white background) in evidence. The NSL applies just before the sign - this is both ways, approaching the village from the North or the South. And, there are no signs that tell you that the 40mph limit ends when you leave the village. How enforceable is the 40mph limit here and how do you know when the NSL once again applies? I find it all mildly irritating (if not vitally important).
I would have thought that unless the speed limit sign is of the correct dimensions and colours etc then its not enforceable. There are a few round here like that, square ones with odd colours saying 30mph but in between two sets of them is a normal speed limit sign saying 50mph.
ha bloomin ha (actually, that is funny and made me laugh!!)
but you still havent answered the question....its killing me now so unless you want to be had up for abusing a member of the public by mental torture, spill the beans!
For it to be a dual carriageway there needs to be some form of central reservation / divider stopping traffic from crossing from one side over onto the opposite side.