Ling, you make some very good arguments, but I cannot understand how you arrive at an assumption that speed cameras save lives.
I gave a personal example
here which you appear to have overlooked.
Your argument that a contraflow places two lanes in potential conflict, separated only by cones, fails to consider that many roads are 60 mph with NO CONES, and drivers manage not to crossover and strike a vehicle coming the other way.
In Leicestershire on the M1, cameras were put in place "to protect road workers in road works".
5,438 drivers
failed to slow down, and paid
£326,280 in fines, yet not one of the 5,438 drivers killed a road worker, or had an accident.
In fact the people who placed the cameras made no attempt to STOP any of the drivers who were apparently placing road workers lives at risk!!!
I am sure you could have provided a vehicle, and they could have employed two officers to man it for less than £326,280, so it could not be shortage of resources which led to this inaction!!
Like many, you seem to think we are against cameras because we wish to speed over the limit.
I for one want sensible limits, governed by common sense like the rules governing aircraft, and proper road safety measures in place, not a slavish persecution of speed, to the exclusion of all else.
Everyday on my way to and from work, I pass through a 40 limit which was petitioned for by a group of people who met in a pub. The county council gave in to them on the grounds that it showed they listened to the wishes of local people. Since the limit and major re-organisation of the road layout was introduced, they have placed speed cameras - mobile at first, and now fixed cameras. Accidents (KSI's) have gone UP!!

Now does this look like a road requiring a 40 limit? It's one of the busiest tourist routes in Britain. So how have cameras helped? KSI's UP, and a substantial contribution to £1.6 million pounds collected in Cumbria by the "Safety" Camera Partnership. That = 26,666 drivers speeding, and not one of them was stopped from speeding!!
And the accidents used to meet the criteria for placement of the cameras?
A local man, had a heart attack at the wheel of his car UNDER the speed limit, and ended up upside down in a ditch, and a driver had a stroke and struck a tree!
My view of speed cameras is not disimmilar to your view of the company policies which prevent you leasing motorcycles!! You just know it doesnt make sense!

A well made argument Ernest. However I can not see the point of personal examples, however important they mey be on a personal level. I'm not saying you don't find it very important, as are most personal experiences.
But road policy cannot be made by canvassing 1 day's 200 million personal experiences (if every motorist has several per day).
Common sense professional behaviour to which pilots in the main comly with (I was surprised to find out myself) include not eating spicy eg Indian food before a flight. I cannot see this being adopted by drivers, so I do not think your utopia of rules governed by common sense will work.