タクシープローブとVICSの相関性に基づく自然災害時の道路交通状況の予測

抄録

Transportation systems in the eastern part of Japan were suspended after the 2011 off the Pacific coast of Tohoku Earthquake. The earthquake, which occurred at 14:46 JST, resulted in the interruption of almost all railway services in Tokyo until the next day. There was a significant increase in road traffic the day after the earthquake and congestions were observed all over the city. This study investigates the relationship between the average travel speed of vehicles estimated from the probe-car data and the average length of traffic congestion obtained from Vehicle Information and Communication System (VICS). Employing the relationships, the travel speeds of vehicles during Typhoon Roke on Sep. 21, 2011 were estimated.