A survey on drivers' speeding behaviour was conducted in a representative sample of drivers in Norway. The main aims of the project were to investigate who the most frequent speeders are, to understand why people speed, and to map peoples' knowledge about speeding. As measured by their own statements, young men between 21 and 40 years are the most frequent speeders at roads with speed limit 80 km/h, whereas the youngest men (i.e., 18-20 years) are the ones who speed most often at roads with speed limit 30 km/h. Intentions, habits, perceived behavioural control, descriptive norms, and a feeling of speeding as being "pleasant", are the most important predictors of speeding behaviour. As for knowledge about speeding, there are no clear patterns in the results. The data reported here will serve as "pre-test" data and will be compared to one or several "post-test" surveys in order to evaluate a campaign planned by the Norwegian Public Roads Administration.