List of documents written by or co-written by ASANO Motoki II-158, Winter road Management Standards of the Hokkaido development Bureau II-156, Evaluation of the Ten Years Since Studded Tires Were Banned in Hokkaido and Future Issues III-143, Pedestrian Behaviors on Crosswalks at Intersections in Winter III-157, Characteristics of Winter Roads Traffic in Hokkaido: Case Study in the Sapporo Urban Area