SPECS are stupid all you need to do is change lanes b4 you get to the second set and youll be fine hence they have a camera for each lane they cant track more than one lane of traffic not that ive tried this ofcourse.
Ah ha ! I never knew that, thanks. Not that I care too much at the moment as the M5s miles away.
Be careful with this one. Apparently, this is merely a small technical hitch. Anyway, who's to say that it's not a double bluff, and the first and second set of cameras are set to record different lanes.
Also, you'll note that there are a few different sets of cameras, so you don't know which ones are switched on/off at any one time.
Solution - when you see SPECS drive within the speed limit. There's no other foolproof way of avoiding a ticket.