These days, urban areas suffer more and more problems concerning emission of harmfull gasses. One of the causes of these problems is the emission by local traffic. Several studies shows that a certain amount of traffic exist of search traffic. Traffic that is searching for a parking spot nearby their final destination. By providing real time parking information towards car drivers, the drivers to not have to search for a parking spot. Which means a reduction of search traffic and resulting in less emission of harmful gasses. This study is focused on the car drivers preferences regarding parking information.