medhead, sorry to disagree, but I simply must on a couple of issues.
Speeding fines are source of much angst by members of the public. Essentially they hate getting caught doing the wrong thing, they feel embarrassed, and they try to justify anything to get out of that.
Road speed limits are set for the single concept of reducing the incidence or severity of accidents. They are not set to raise revenue. That is just codswallop invented by people to try to not feel they are naughty. Not a single person involved in setting those limits gets any benefit from fines from those who are careless and exceed the limit.
But because people get caught out, and try to save face, they often contest tickets in the forlorn hope of redeeming themselves, even if undeservedly. And our legal system works heavily in their favour as we have a system making it almost bulletproof against failure. Any doubt and a ticket gets thrown. But they almost NEVER do. Both the equipment and the procedures in using them have been developed to an extremely high standard.
The laser speed detection equipment you refer to (LIDAR) is amazing. I know it very very well. You say someone said it is hard to aim??? What??? No it is not. And the suggestion to change lanes?? Do you mean if you are breaking the law you are advising methods to try to escape punishment? Do you want speeding people who think they see a radar to suddenly veer across the road?????? Very low moral ground.
People carp on with all sorts of nonsense and urban myths. Reflections from the road surface? A simple but important concept with LIDAR is that it does not measure speed. It measures distance. It measures this multiple times in a very brief period and using the differences in distance it CALCULATES the speed. If you do not get the importance of this you cannot grasp why they are so accurate. And they have imbedded a zillion fail-safe internal tests so that if anything at all is not coherent in the data they ditch the lot and give you the benefit of the doubt. The accuracy of the equipment is phenomenal - the same equipment as used by Qld Police is used in the space effort - they use it for space docking procedures.
As for being hard to aim, yes, it is nice to support the equipment against a pole or similar, much like using a rifle. But it is not hard. But the area of targetting is small and so accurate. I always used to take the speed from the front of the helmet of motorcyclists. Or the rego plate on a car.
As for the downhill thing, what on earth makes you think it is ok to speed downhill? Yes, I know that we all gain a little speed going downhill, but we need to be conscious of this and correct it. It takes longer to brake going downhill. Very basic physics.
And finally, you find it sad that it is illegal in most places to have gear that helps people to avoid being caught speeding? Again, very shaky morally. What next, a police detector so thieves can avoid them?
Australia is very tough on road safety. Yes, we have all got tickets and feel bad about them, because we all "know" we are good drivers and not dangerous.
Most fatal crashes are caused by average, "good" drivers, who in that moment made a small mistake. And so the law trys to hammer everyone in to being very conscious. Causes many fines to otherwise good people, but it also saves massive amounts of lives and injury.
But always we will have people who think that their "minor" transgressions are just that - insignificant. But they are not.
Go to a few fresh crashes and see and feel and smell the result.
Sorry, talking as an ex crash investigator who literally had to pick up the pieces