ACTUAL CONDITION OF MOVING AND PARKING TIME OF VEHICLES, AND CALCULATION OF APPROPRIATE PARKING CAPACITY IN THE CITY CENTER

Abstract

 In this study, using the master data of the past two household travel surveys conducted in the Kumamoto metropolitan area, the moving and parking time of all cars, the actual number of inflows and outflows by zone, and their changes were clarified. The appropriate parking capacity in the central area of Kumamoto city is calculated by our own developed parking simulation model and some kind of queuing theory. In addition, we try to calculate the appropriate parking capacity for all vehicles after the spread of Shared Autonomous Vehicle service (SAVs), which is expected to significantly reduce the parking time. As a result, it was revealed that the number of parked cars has decreased in many areas in Kumamoto city, and even now, that the parking lot is over-supplied in the central area of the city. With the spread of SAVs, the parking lot will become even more excessive. These results give useful knowledge for parking policies which consist not only of quantitative supply but also of the position and location.