speed trap detectors

[marksi]

These are the same ones I mentioned earlier in this thread.

I'm surprised that only one person has been caught, but on the other hand they're certainly doing their job at reducing speed on that road. Surely that's the measure of how effective they are, not how many people they're catching over the limit...

[Sput]

This may seem like a totally mental idea, but why not just get someone to drive quickly down that stretch of road a number of times and see if they crop up in the system? That's all the testing you really need.