Implementing a set charge ~soft tool! proportional to a vehicle’s deterioration capacity does not necessarily lead to an
economic optimum among the different financing mechanisms.
Owing to the fact that the marginal cost of maintenance
operations is generally lower than the average cost,
the economic optimum charge will prove to be a Ramsey
fee—where the difference between the marginal cost and the
cost of financing maintenance is inversely proportional to the
elasticity of demand. Owing to the fact that freight transport
demand is usually more elastic than passenger traffic demand,
the economic optimum charge is not generally proportional
to the road deterioration capacity of a vehicle