PRELIMINARY ANALYSIS ON HOW TRIPSCHEDULE AND HOUSEHOLD ATTRIBUTESAFFECT EFFECTIVENESS OF CAR-SHARINGSYSTEMS

摘要

This research investigates potential effectiveness of a car-sharing system for a mid-sized cityin Japan. Sharing vehicles by a community is expected to reduce the total number of vehiclesowned in the community and save the parking space and vehicle-owning costs. Trip diary dataon both weekdays and weekends are analyzed in this paper to estimate the number of vehiclesthat can be reduced through car-sharing. We examined the household members' trip schedulesin every household and in every community represented by a traffic zone in this study, andcalculated the number of unused vehicles in a day. It is found that nearly 20% of vehiclesbecome redundant by reorganizing trips in households and that more than 30% could bereduced by optimizing trip schedules and using shared vehicles in communities. We alsodeveloped regression models to identify the effects of household attributes on the possiblereduction of car ownership by joining car-sharing.