Abstract
The more cars we use, the more shops will move to suburbs with large parking lots. This makes the central part of a city decline, especially in local cities. Regarding this problem, many researches have been performed so far. Although one possible remedy for this seems to provide more parking lots for traffic convenience, it is partly true that we have already had sufficient parking space in the central part of a city. It is probable that this increase of parking lots decreases shopping floors because the area is limited. With shopping behavior model and land-use model, we analyzed the trade-off relationship between two land-uses: shopping floors and parking lots, to examine which is more effective in the central part of a local city.