Lightweight lane positioning of vehicles using a smartphone GPS by monitoring the distance from the center line. - Yoshihide Sekimoto; Yutaka Matsubayashi; Harutoshi Yamada; Ryuichi Imai; Tomotaka Usui; Hiroshi Kanasugi (ITSC, 2012)

Study on Trip Purpose Estimation Method Using Operational Data of Mobile Network. - Ryuichi Imai; Daizo Ikeda; Hiroyasu Shingai (SCIS&ISIS, 2018)

Generation of Car OD Using Mobile Spatial Dynamics for Understanding Road Traffic Flow Using Car Probe Data. - Ryuichi Imai; Toshikazu Matsushima (SCIS&ISIS, 2018)

Development of a Geocoding System for Diverse Road Data. - Ryuichi Imai; Hisatoshi Taniguchi; Satoshi Tajima; Hiroyoshi Hashimoto; Koichi Shigetaka (SCIS&ISIS, 2018)

Automatic Generation of Road Feature Identification Models from Point Cloud Data Using HD Maps. - Ryuichi Imai; Kenji Nakamura; Yoshinori Tsukada; Noriko Aso; Jin Yamamoto (SCIS/ISIS, 2022)