Very stupid. They should use accurate equipment and enforce it strictly. If the limit is too low for some conditions it should be raised. It's a limit, a maximum; it's not a minimum, a requirement, or a suggestion. There are plenty of laws lowering the limit from the posted number to address conditions.
Exactly. It says maximum on the sign so anything significantly over that limit should be fined. In my area, the main road's speed limit has been reduced and yet people are still running at the speed they were used to.
Around here, it is generally accepted that cops allow 10-mph "buffer" before they'll even think about stopping you for speeding. In fact, it's almost an unwritten rule, although there's nothing in the law to support it. From what I've heard, the reason is because there is often some error in vehicle speedometers and the speed measuring devices used by police. Supposedly, it's a lot easier to fight a speeding ticket in court and win when it's for a speed <10 mph of the posted speed limit, so cops don't bother stopping people unless they are speeding more than 10 mph over.
See, error in the speedometer means that there's something wrong with the vehicle, and if there are other vehicles running, their speed should be an indication of how fast you're driving already. Error in the speedometer is analogous to headlights and brake lights not working, which can be fined for endangering public safety.
Have you ever heard of anyone getting a ticket for one or two mph over the speed limit from a speed camera? I'm asking because I doubt that they would have them set up that way. There's probably a "buffer" built into them as well.
I don't know anyone specific, but if you're off by a few mph, you usually get a warning by mail of when that happened. If you're caught by going over by more than 6 or 7mph, you'll get a ticket.
If you ask me, Canadian laws are way too soft to everyone. If only our judges are as tough and as reasonable as Judge Judy~