Re: Good going cobber
2 down... mmm, ok, explain why.
The fixed camera is where I say... a good distance after the accident zone, in fact (confirmed by MP with the chief constable) on the border of how far from the accidents they could get away with.
The A11 mobile camera situation is exactly as described
Both are chasing revenue not safety.
As I say elsewhere, if speeding is safety related then take the speeders off the road using the points system. If it is revenue related keep taking the fines, it is obvious and simple.
Interestingly could probably do what the Germans do and leave large tracts of motorway with no speed limit, depending on the study you quote this has some safety down or some safety upsides, what it does is encourage people with fat wallets to spend a lot more on fuel and therefore fuel tax to show how fast they can go.
Next argument of course is about the arbitrary nature of the number.
In town the number 30 is chosen as some compromise between moving at all and killing any pedestrian you come across, the kid stepping off the pavement is not always a predictable occurrence (although I slow down for any group of kids, especially the young equipped with footballs).
On a motorway the number 70 was not chosen for such reasons. At 70 if you hit a pedestrian you will kill them (not that you should find too many on a motorway). But now consider the safety peoples argument... at 69mph you are safe, at 71 you are magically unsafe. Now consider my Austin 7, the footbrake operates prestretched cables on the backwheels only (to operate front brakes use the handbrake), it has no airbags, no abs, vague steering, plywood and fabric for a body... if it could manage 69 (probably only down a very very long steep road with a tail wind and out of gear) it is a veritable death trap (indeed it is at 40). Compare that to an Aston Martin with airbags, abs, crumple zones,hydraulic multi caliper ceramic brakes... at 71mph that car can outstop anything you have a chance to see. Even allowing for the distance you travel while thinking the idea that breaking the speed limit of 70 is dangerous is obvious complete bollocks.