About WATANABE KEN'ICHI
About 大分県警
About 月刊交通
About traffic accident
About latitude (geodetic coordinate)
About longitude
About pedestrian
About elderly person
About Oita prefecture
About geographic information system
About human error
About vehicular gap
About map (atlas)
About dangerous zone
About Accident Prevention
About factor analysis
About data analysis
About hiyari-hatto
About road map
About road map
About Motor vehicle accidents,traffic safety
About 交通
About 事故分析
About 緯度
About 経度
About 有効活用
About 歩行者
About 対策
About GIS
About データ分析