Abstract
In Japan, rapid railway lines have been installed and expanded in order to connect regional prime cities to Tokyo, while airlines began to enhance their domestic service after the deregulation of airlines in 1986. In longer term, the influence of competition between railway and airline become more complex, because of network externalities of LOS improvement on networks. This study makes a retrospective assessment of inter-regional transportation services in ODs with their demand by using the Japanese longitudinal data in 1970, and 1995. The inter-regional net passenger traffic, average speed, fare per distance, and least frequency of the link in line-haul route are compared to find the characteristics of inter-regional LOS. Through the analyses, three kinds of inter-regional transportation markets were identified, and the characteristics of those were summarized. The network externality in LOS strongly appeared in railway service and demand. Such modal characteristics should be carefully considered in inter-regional network planning.
