Measures to support reduced speed limits in built up areas

The working paper contains a cost-benefit analysis and a cost-effectiveness analysis of eight measures designed to support reduced speed limits in urban areas. The analyses were performed according to two sets of assumptions: (1) Lowering the speed limit and introduction supporting measures is introduced as a package of measures. (2) The supporting measure are introduced only as a means to enforce the speed limit. In the first set of assumptions, travel time costs were omitted from the analyses. Speed humps is the most cost-effective measure. The benefit-cost ratio of the measures depends very much on whether travel time costs are invluded in the analyses or not. Only 2 of a total of 96 analyses show that benefits exceed costs when travel time costs are included, as opposed to 57 out of 96 analyses when travel time costs are omitted.