Cost-benefit analyses (CBA) are often questioned on the grounds that results depend crucially on uncertain assumptions about the future, and on ethically or methodologically contestable trade-offs between different types of benefits. This paper explores the robustness of CBA rankings of...

The effects of road pricing on transport and location patterns have been much discussed. However, it is unclear how large the effects are, and whether relocation of households, workplaces and shops will counteract or amplify the effects on transport. In this paper a model of a generic symmetric...

The relationship between speed and income is established in a microeconomic model focusing on the trade-off between travel time and the risk of receiving a penalty for exceeding the speed limit. This is used to determine when a rational driver will choose to exceed the speed limit. The...

We examine the implications of search unemployment for the evaluation of a transport investment in a conventional cost benefit analysis (CBA) assuming perfect competition. Lower transport costs induce search over a larger area and longer commuting distances. The expected duration of vacancies is...

We formulate an empirical model of congestion for a series of sequential expressway links where queues may form and spill back. Its purpose is to disentangle the dynamic effect that a marginal vehicle has on the distribution of travel times experienced there and on connected links. We estimate a...