We report a vehicle-fleet experiment with an economic incentive for keeping within speed limits using a speed-alert device. A traffic insurance scheme was simulated for two months with a monthly bonus that was reduced by a non-linear speeding penalty. Participants were randomly assigned into...

The external costs of road transport have been on the top of the transport policy agenda for almost a decade. While the discussion has been centred around the environmental costs, it emerges that the external accident cost is often the main component. Here the theory of accident externality...

Standard practice in econometric estimation of the value of travel-time changes divides travellers into market segments and assumes linear utility functions in each category. Here instead we derive a RUM-model from a second-order approximation to the utility function. The model is estimated by...