ROUTE CHOICE WITH HETEROGENEOUS DRIVERS AND GROUP-SPECIFIC CONGESTION COSTS

This paper focuses on the interaction between two aspects of road transportation previously considered only separately - user heterogeneity and route choice. The model, which treats two groups and two parallel routes, is static, though it includes as a special case the reduced form of Vickrey's dynamic bottleneck model. In equilibrium groups may travel together or separately, depending on the relative magnitude of own- and cross-group congestion costs. Optimal tolls are solved for both integrated and separated usage. In the bottleneck case, separated usage may be optimal if one group has both higher travel time and schedule delay costs.