The disutility of driving below the speed limit on highways

Reducing travel speed below the highway speed limit leads to savings in fuel consumption and CO₂ emissions. However, car drivers may be reluctant to drive more slowly either because they do not want to lose time or for other reasons we refer to as ‘the disutility of driving at lower speeds’. In this paper, we use a survey experiment to isolate the disutility of driving at lower speeds by comparing drivers’ willingness to accept compensation for a fixed increase in travel time caused either by taking a longer route or by travelling at below-limit speeds. We show that Czech drivers require higher compensation for travelling at lower speeds than they require for the same travel time increment caused by a longer distance. This result represents the first piece of evidence showing that the disutility of driving at below-limit speeds on a highway is substantial and economically relevant.