Abstract
The public transportation service has many factors of the deterrence, such as fixed operating time and distance to the bus stop. To promote the use of the service, it is necessary to eliminate or decrease the deterrence. Especially in aged society, it is important for the service planners to understand the key factors of the deterrence recognized by the elders. However, critical factors may be different from physical functions of each person. In this paper, physical functions are estimated using item response theory and then the probability that each factor is recognized as deterrence is measured. Finally it is shown that the probability is highly affected by the physical functions of the elders.
