Stockholm turned a speed camera into a lottery

Volkswagen and DDB Stockholm's 'Fun Theory' ran an open competition on a simple premise: can making a thing fun change behaviour where enforcement can't? Kevin Richardson, a San Francisco game designer, submitted the winning entry — turn the hated speed camera into a game with a positive expected value.

The Swedish National Society for Road Safety ran it live on a Stockholm street for three days in late 2010: the camera photographed everyone, fined the speeders as usual, and entered the law-abiding into a lottery paid out of those fines. 24,857 cars passed it.

Game designer Kevin Richardson's winning Fun Theory entry photographed everyone: speeders paid fines that funded a cash lottery for the drivers under the limit.

Photographed every car, not just speeders, and funded a lottery for compliant drivers from violators' fines, turning obedience into a positive bet.

Every car was photographed, so compliant drivers could be identified and rewarded.

Fines funded the lottery, making the system self-financing and politically viable.

The reward gave drivers a positive incentive to obey, not just fear of punishment.

The novelty and media attention amplified the effect, though it may not persist.

When enforcement breeds resentment, fund rewards for the compliant majority out of violators' fines to make obeying a positive bet.

Average speed at the camera fell 22% (32→25 km/h) in the three-day pilot. Never institutionalised — which is part of the lesson. Average speed fell from 32 to 25 km/h and the clip went permanently viral, but Sweden never institutionalised the idea — moving the apparatus and keeping the novelty alive cost too much. The 22% figure survives as the standard citation for reward-based enforcement, and the caveat survives with it.