Going Fast or Going Green? Evidence from Environmental Speed Limits in Norway

Abstract

This paper studies the impact of speed limits on local air pollution, using a series of datespecific speed limit reductions in Oslo over the 2004-2015 period. We find that lowering the speed limit from 80 to 60 km/h reduces travel speed by 5.8 km/h, but we find no effect on local air pollution. A conservative cost–benefit calculation suggests a net social loss from the speed limit reductions of 0.52 billion USD each year. Our findings imply that policy makers need to consider other actions than speed limit reductions to improve local air quality.