Deleted User 2893
Striker
There must be two invisible junctions near the layby in question and also on the bank itself. Silly me.
The vans in question wait exactly where people speed up. The accidents do not occur there, they are further back. Anyone would think they are just looking for speeders in the most obvious (and very safe parts), rather than being a visible presence on the worst sections of the road.
If you break the speed limit you can't complain if you get caught.