Kenji Kosa (Assoc. Prof. Kyushu Institute of Technology, Kitayushu City, Japan) Jyunko Taguchi (Graduate Student, Kyushu Institute of Technology, Kitakyushu City, Japan) Satoshi Yoshihara (Senior Engineer, Hanshin Expressway Public Corporation, Osaka, Japan) Katsunori Tanaka (Engineer Yachiyo Engineering Co. Ltd, Osaka, Japan)