Yoshiaki TaniguchiKodai NishiiHiroyuki HisamatsuEvaluation of a Bicycle-Mounted Ultrasonic Distance Sensor for Monitoring Road Surface Condition.31-342015CICSyNhttps://doi.org/10.1109/CICSyN.2015.16conf/cicsyn/2015db/conf/cicsyn/cicsyn2015.html#TaniguchiNH15