The paper describes an Intelligent Speed Adaptation (ISA) project in Denmark called Spar på Farten. The project is based on Pay As You Drive principles, which means that the ISA equipment both gives a warning when the driver is speeding but also gives penalty points which reduce a promised bonus of 30 % on the insurance rate. In the project the authors have developed an On Board Unit (OBU) for ISA with mobile telephone (GPRS) connection to a web server, an advanced map matching program, and an air based map update function. They have developed a speed map for 22,000 km roads, including a web based maintaining tool. The project will proceed in a three year test period with the goal to involve 300 car drivers as participants in the project, and has some very promising preliminary results from the first 3 months of driving, e.g. showing that the percentage speeding more than 5 km/h on 80 km roads is reduced from 28% to 2%. Until now 90 OBU are installed.
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