Decision makers establish the financing formula to get a transport project built once (ideally) both its efficiency and its financial sustainability have been justified. Whilst it is assumed that the intergenerational redistributive effects arising from the financing structuring of major projects and integrated investment programmes are generationally neutral, outcomes obtained through the intergenerational redistributive effects model (IREM) stress that the distribution of funding and payments burdens for major projects may entail significant negative impacts on the individuals involved. IREM has actually proved its utility to perform intergenerational impact analysis properly, i.e. to analyse to what extend an investment in infrastructure is fair and sustainable from the intergenerational perspective.