Queensferry Crossing, variable speed limit, average speed cameras

[uhtredbebbanburg]

I commute over the Queensferry Crossing daily. There are some overhead works being done right now and the variable speed limit signs are sometimes as low as 40 mph. This is really hard to maintain when you have no one if front of you and a queue behind you. In May there was a lot of fanfare about average speed cameras being switched on in that area. Not wanting a ticket, I stick to whatever slow speed limit is shown. However, everyone is zooming past me. What do they know that I don't? Even when the variable speed limit is not reduced, I stick to 70 mph but people are zooming past. Are they all getting tickets? Or is it just a big ploy and the cameras aren't on? I'm not interested in speeding, just wondering if I am missing something!

I'm curious about this too, as a daily Fife to Edinburgh commuter.

There was such a lot of publicity about the cameras being switched on.

Ooh I hadn't even noticed cameras and I go over couple of times a month
Are they on the actual bridge or on approach roads?

Also curious.

The ones on the A77 at Kilmarnock to Ayr must be on because everyone does 50 there. On a bypass. In countryside.

(Fair enough, around Hansel Village or where the turn off is for Dundonald but otherwise, 50 seems a bit tedious)

There are six new cameras in a stretch on the M90 including the bridge. I think someone is having fun with us though because sometimes there is no traffic but the variable speed limit can be knocked right down.
news.stv.tv/east-central/speed-cameras-take-aim-at-edinburgh-and-fife-drivers-on-m90-and-m9

Is that just the speed cameras at the side of the overhead gantries that have been there for months? I thought they were just ordinary speed cameras that measured the speed as you pass them?

Or have they installed the yellow ones on tall poles like they have on A9 and A92?

It’s all very mysterious. They’re not the yellow ones and not at all obvious.

The speed restrictions are for the safety of the overhead workers.

@Twix42 - they use the speed restrictions for other things too, like to slow the traffic down well before the bridge if it is congested.

There doesn't seem to be a lot of logic behind it & it often doesn't seem proportionate to the traffic conditions.

I've been wondering this too-I also commute across to fife. I did spot the camera on the way back towards Edinburgh recently-just before the bridge, they're not that easy to see, but I don't really understand the 'average speed' bit, as presumably would have to measure your timing between two cameras and I don't think I pass two. The current speed restriction is for workers safety though, so seems fair.