Yeah, those numbers are metric - KM/H. My ultimate speed thrill is getting a photo-radar to take a picture of my butt on my mountain bike!
These kinds of "speed traps" are more to encourage people to keep to the speed limit. I know that in my city, schools "borrow" them from the police to encourage motorists to keep to the 30km/h speed limit in school zones.
LaterZ!
Darren!!