In addition to the morbidity and mortality it causes through air pollution, road traffic leads to noise stress, loss of quality of life, water pollution, etc. Various economic evaluations show that the costs of its overall impact are far greater than the additional taxes paid by road transport (through fuel tax, registration, etc.). In other words, road traffic does not pay for the social costs it generates, which is tantamount to its being subsidized. This favours a pattern of transport development, and especially that of road transport, which is accompanied by excessive impacts on the environment and health.