INFORMATION EFFECTS IN TRANSPORT WITH STOCHASTIC CAPACITY AND UNCERTAINTY COSTS

In this paper the impact of information provision to travellers using a model based on a stochastic equilibrium concept is analysed. A new a nalytical framework is proposed by including a specific term related t o the costs of travel-time uncertainty, per se, into the generalised c ost function. Different driver information models are analysed to asse ss the efficiency-improving features of driver information systems com pared with the (optimal) first-best policy of road pricing. The result s reveal that the potential of driver information systems as an effici ency-improving policy instrument are underestimated if costs of uncert ainty are ignored.