Abstract
In Japan, truck transportation which has been important on logistics has such problems as exhaust gas, traffic jam, shortage of drivers, and so on. Then the modal shift from truck to another means of transportation has provoked a great deal of controversy in several places.
In this paper, the authors study the modal shift from truck to middle/ long-distance ferryboat services effective to the problems of truck transportation. Firstly, it is analysed about the present conditions and problems of the ferryboat services in search of the factors affecting modal shift. Secondly, considering those factors, ferryboat choice model are constructed. Finally, it is examined that the speeding-up of ferryboat is effective in modal shift.