According to "Honest John" in the Motoring section of Saturday's Telegraph, the makers of the Specs cameras used to monitor average speeds have admitted that their cameras can't check the speed of people who change lanes between one bank of cameras and the next.
Basically, it says that currently the 'narrow (view) band' speed cameras are now being replaced by the new 'broadband' cameras (these are four lens cameras -- not one or even two training only on the faster lanes) scanning all four lanes simultaneously, so changing lanes between the two sets of cameras doesn't make any difference.
I imagine he gets cross with drivers who leave selecting the right lane for a junction until the last moment, forcing a gap in a stream of traffic they should have joined a minute ago, often slowing suddently in the lane they're leaving causing mayhem and annoyance to other drivers. Worst place I know of for this is where the incoming M40 joins the M25 - plenty of warning, lots of time to get in lane, then at the last moment some get runs up the outside of the queue and stops in a lane which was up till then going along nicely so he can push in.
As it happens you can usually spot such idiots and be prepared for them.
Anyway - to address the original question - I doubt very much that the designers didn't think to share the data from lane to lane.
Art ( snipped-for-privacy@netcaba.com) gurgled happily, sounding much like they were saying :
In this group, yes.
You'd be wanting uk.rec.cars.misc, uk.transport or - preferably - uk.rec.driving for this topic. You'd also find this one's been done to death over there already.
A third lane exit jockey. And a wrong lane retard is a similar beast, that is seen on roundabouts and traffic light junctions.
Both can be easily baited by equalising speed with them when you are in the correct lane. Quadrouple points can be gained by making them slam the anchors on both on the motorway, and the roundabout.
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