Cost-benefit analyses of walking and cycling track networks taking into account insecurity, health effects and external costs of motorized traffic

The study presents cost-benefit analyses of walking and cycling track networks in three Norwegian cities. The cost-benefit analyses take into account the benefit of reduced insecurity and the health benefits of the improved fitness the use of non-motorized transport provides. In addition to reductions in health costs, the analyses also take into account that a change from travel by car to cycling or walking means reduced external costs (e.g. air pollution and noise) from motorized traffic and reduced parking costs. The benefits of investments in cycle networks are estimated to be at least 4-5 times the costs. Such investments are thus more beneficial to society than other transport investments. The results of such complete cost-benefit analyses make it possible to calculate the benefits to society that are not realized because motorized traffic prevents people from bicycling or walking as much as they otherwise would prefer. These "barrier costs" attributable to motorized traffic are estimated to be of at least the same magnitude as air pollution costs and more than double the noise costs. Barrier costs should therefore be taken into account in the same way as other external costs, when the issue is to determine the proper level of car taxes or to evaluate different kinds of restrictions on car use.