If you are driving around the Loop 101 in the Scottsdale area watch your speed. They have speed cameras triggered by strips laid in the roadway and the time taken to cross them is used to work out your mph..(so radar detectors don't help). The locals know where they are and you will find the traffic slows somewhat in those areas. Also Scottsdale police use a nondescript white van parked by the side of the road in urban areas, with a camera operating out of a rear window . Again most locals are familiar with it so watch for brakelights as cars in front of you spot it.

Exraf