The city of Dallas, TX installed traffic cameras at major intersections, to catch people running red lights. The cameras have been so successful at reducing infractions that they’re no longer generating enough revenue to cover their operational costs. So now Dallas is considering shutting down the cameras. This is a common governmental misconception, viewing tickets as a source of revenue rather than a punishment. It reminds me of municipal water boards that had to increase their prices, because their conservation campaigns reduced water usage to the point where they were losing money.