Abstract
In this paper,analytic models are developed for optimizing circular route bus services with elasticity in their demand characteristics. The demand function include the wait time(running interval time), service time, travel time, access time and fare. The optimization objective is maximum social welfare. The social welfare consists of the consumer surplus and the total profit. The application of this model is confirmed by using the actual road network in Nagano city. The model is used to perform simulation experiments,and to analyze the characteristics of the optimal running interval time and fare.