RESEARCH - The Effectiveness of Speed Cameras
Love 'em or hate 'em, speed enforcement cameras save lives. This review of the evidence of the British experience with speed camera enforcement shows that camera use results in a substantial improvement in compliance with speed limits, a particular reduction in extreme speeding, a marked reduction in average speed at fixed sites and an appreciable, though more modest, reduction at mobile sites.

Erin Couldwell was operating his bicycle at the exit of a parking lot onto a lane near the Victoria Police Department headquarters just before 7:00 am on September 25, 2014. His bicycle had neither lights nor reflectors. Constable Horonowitsch had just commenced his dayshift and was approaching the parking lot exit in the lane driving a marked police vehicle with it's normal vehicle lighting on.
The driver reaction to traffic tickets has always puzzled me. Arrest someone, fight with them, throw them in jail and see them through to penalty in criminal court seems to be business as usual for the police, but write someone a traffic ticket and it's like you've called their mother a bad name.