Development of Road Network Improvement Evaluation Considering Trip Region Enlargement Effects of Mountain Area Residents

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In this research we studied travel behavior of rural residents living in a mountain area, particularly the city visit behavior of their discretionary trips. A simple conceptual model is proposed. A simulation study shows that the time of city visits on holidays depend. on demographic characteristics rather than the distance between a city and a village, and on both demographic characteristics and the distance on working days. Actual investigation is executed by two travel diary surveys, one for 120 residents living in Mikawa, Yanadani and Omogo villages investigated in 2000 with this grant-in-aid for scientific research, the other for 120 residents living in Kuma town investigated in 1999 with another grant-in-aid. Both are seven consecutive days travel diary surveys in a mountain area in Shikoku Island, Japan. It is found that 94% of households visit the city Matsuyama, consuming more than two hours drive in the round trip, at least once a week to obtain better goods or services, and their average number of trips is close to that of urban residents.