Sources: Pop Up City
In Spaarndammerstraat, Amsterdam, in 2013, the city implemented an incentive system to reduce speeding and motivate good citizenship: Every driver that passes by the speedometer below the speed limit of 30 km per hour raises €0,03 for the neighborhood. "The city’s slogan: Max 30 — Save for the Neighborhood” (Pop Up City). The money raised by this initiative is granted by the city of Amsterdam and is meant to be invested in local community projects.
References: - Rebekka Keuss, "Amsterdam Rewards Safe Car Drivers With Money For The Neighborhood", Pop up city, August 15 2013, http://popupcity.net/amsterdam-rewards-safe-car-drivers-with-money-for-the-neighborhood/ - http://www.at5.nl/artikelen/107189/zachtrijder-krijgt-beloning-in-spaarndammerstraat