Shadow the Brake, They Might Not Stop
One evening while patrolling in an unmarked police car I approached a cross street that was controlled by stop signs. I could see a car approaching from my right going fast enough that I was concerned that the driver did not intend to stop.

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.