Reduction of police vehicle accidents through mechaniically aided supervision.

Researchers put a small recording box in every police car. The box tracked speed and stops.

Each week a supervisor looked at the printout and talked with the driver. No extra training.

Personal-injury crashes almost vanished. The city also saved more money than the boxes cost.

Officers kept driving, just more safely.

Hawkes et al. (1974) had swimmers post their own attendance on a wall. Public self-records plus coach chats cut missed practices the same way tachographs plus supervisor talks cut crashes.

Wolchik et al. (1982) added a quick verbal prompt to no-smoking signs. That tiny extra cue, like the weekly feedback here, turned a weak sign into a strong fix.

Neuringer et al. (1968) used painful shock to stop smoking. Drivers hated the device and took it off. The 1980 study shows feedback beats pain: officers accepted the box and results lasted.

You can copy this in any fleet, not just police. Pick a behavior you can track automatically—speed, sharp turns, seat belts. Add one five-minute weekly feedback chat. The hardware is cheap now; the talk is free. You get safer drivers and lower insurance bills without writing a new policy.