Taxes on fuels in general use are universal: a substantial proportion of the tax on fuels has a macro-economic and revenue-raising basis, related to the fact that the motor car is excellent target for taxation. The rest covers not only the social costs but also the costs of infrastructure, both of which are poorly-understood. There are few countries(e.g. Netherlands, Sweden) for which the taxes on the different fuels do reflect some differences in their degree of pollution. Moreover, fuel consumption does not exactly reflect the social costs of traffic; local differentiations are impossible. Finally, the taxation of fuels affects the overall use of the particular mode of transport, and not its differentiation according to location and time