boring average speed camera question

[Mark]

Pub discussion last night I can't find the answer to so I thought I'd ask here:

If you drive in a 3 mile long 50mph limit section of motorway which has 3 average speed cameras along its route, is your average speed taken over the 3 miles or are there 2 separate readings?

So if you drove at 67mph between camera 1 and 2, then 40mph between 2 and 3 your average is roughly 50mph. Would you get done for the 67 mph bit? Or would you be ok because your overall average is 50mph?

And if you drove at 67mph between camera 1, 2 and 3 would you get 2 tickets?

[Gerrard]

A few years ago, I was told by a policeman that if you changed lanes whilst in the restricted zone the cameras were unable to record your average speed. Not to be relied on though as I suspect that technology has since caught up with this glitch.

[Salsaboy]

I understand it to be between camera and camera as a long time ago, someone I used to know got 3 speed tickets from the same elongated stretch of roadworks on the M1 all timed within about 2 minutes of each other and all in separate envelopes.

[DulwichFox]

Try here . Too small to read one iPod

Http://www.speedcamerasuk.com

Should help clear up situation of Multiple average speed cameras

Foxy