Speed cameras are designed to photograph and ticket speeding cars. This gentleman turned the idea around. His speed camera photographs cars that obey the speed limit. Those drivers are entered in a lottery for a chance to win money. And it seems to work.
The winning idea of the fun theory award, submitted by Kevin Richardson, USA. Can we get more people to obey the speed limit by making it fun to do? This was the question Kevin's idea answered and it was so good that Volkswagen, together with The Swedish National Society for Road Safety, actually made this innovative idea a reality in Stockholm, Sweden.

That could be a hit on my street. 30 miles per hour speed limit, and everyone has to do 40 mph or more down our street.