This paper develops an empirical model of the relationship between road traffic accidents and traffic flows. The analysis focuses on the accident externality, which is determined mainly by the difference between the marginal and average risks. The model is estimated using a new data-set which...

A disaggregated model of the marginal external costs of road accidents imposed by different road users is developed. The model explicitly specifies the adjustment of road users to increases in accident risks imposed by additional road use and is used to estimate the marginal external costs of...