I don’t think I’ve ever been over the bridge northbound but there are definitely speed camera signs heading south - one of them is on the camera post.
I think there was an ‘average speed check’ sign at some point as well but even if there isn’t I’m not sure that would be much of a defence - “yes I saw the 20 limit sign and the speed camera sign but I didn’t know what kind of camera it was”
A while ago, I spoke to a chap (from Fazer’s owners club) who had been done on the bridge whilst on his bike. Apparently, although there’s front facing camera’s on the gantries a little before and after the bridge, the camera’s in the tower catch the rear of the vehicles. Thus, we hypothesised that they can only really catch bikes breaking the limit between the towers, whilst other vehicles can be caught over a longer stretch. I’m not sure which direction he was going at the time, or if that makes much difference mind.
fair enough … there are plenty of signs about … and like you say there is enough rear facing cover to catch regular folks if they want to follow up. will just have to mind myself for that stretch … or buy myself a milk float