Equilibrium Concepts in Modal Split Modelling

The potential usefulness of extrapolating Wardrop's first principle regarding traffic equilibrium on road systems to modal split modelling is evaluated. A conceptual framework based upon equilibrium theory is presented, a model for peak hour home based work trips is developed and the price eguality prediction of the equilibrium model is tested. The test, which used data from the 1971 City of Winnipeg work trip survey, provides support for the equilibrium theory. It is noted that a logit model can be derived from this model. It is concluded that this model and research based upon it can lead to a better understanding of modal choice behavior and to a reliable and stable modal choice model.