Abstract
The Honshu-Shikoku Bridges are expected as life bridge for daily trips and as sightseeing bridge for round tour trips. On the other hand, although the daily traffic on Honshu-Shikoku Bridges is automatically measured day by day, but that data have not been utilized effectively.
This paper aims to analyze a change of traffics and the interaction of bridges by using the daily traffic data Holiday arrangement data and rainfall data are included in analysis. As a result, traffic are affected by the holiday arrangement, and there are round tour trip occurred between the east and west bridges. Furthermore these features are changing with the years.
