This project describes a mathematic estimation of bimodal demand functions for domestic Swiss road and rail traffic, using a method based on the economic principle of the equilibrium between transport supply and demand. This methodological approach uses a real example - the introduction of the mileage-related heavy vehicle tax in the case of heavy goods road traffic and its effects on domestic freight transport.
The newly established transport model for internal freight transport in Switzerland shows that plausible transport demand functions can be derived and specific questions answered by directly estimating demand functions using appropriate basic transport and socio-economic data.