Level: Beginner
Masamitsu Hayasaki, Chief Researcher, Energy and Environment Research Department, Environmental Assessment Group, Japan Automobile Research Institute
Akiyoshi Ito, Group Leader and Chief Researcher, Energy and Environment Research Department, Environmental Assessment Group, Japan Automobile Research Institute
Our main research themes are automobile traffic and the atmospheric environment, as well as the impact of the atmospheric environment on human health, and automobile traffic volume is one of the important pieces of information. Cross-sectional traffic volume, which is one indicator of automobile traffic volume, is traffic volume information obtained from vehicle detectors, etc., and data is made public every five minutes at each location. Currently, cross-sectional traffic volume information is made public for approximately 2,400 locations in Tokyo. Cross-sectional traffic volume is important as an indicator that captures automobile traffic volume over a relatively wide area in a planar manner.
The state of emergency declaration due to the spread of the new coronavirus (COVID-19) has caused significant changes in socio-economic activities, and is believed to have also affected automobile traffic. In this study, we analyzed the change in automobile traffic volume in Tokyo before and after the state of emergency declaration period, using cross-sectional traffic volume as an indicator. We also examined the change in air quality during the same period. JMP was used as the main tool for analysis. By using JMP's data table editing functions such as table join and concatenation functions, and graph functions linked to data, we were able to carry out the analysis efficiently. In this report, we will introduce examples of our use of JMP.
Atsuya Sakai
Completed doctoral course at the Graduate School of United Graduate School of Agricultural Sciences, Ehime University (Doctor of Agriculture)
After working as a JSPS Research Fellow (PD), Hamamatsu University School of Medicine (Academic Assistant), Yokohama City University School of Medicine (Assistant Professor), and Shinshu University School of Medicine (Specially Appointed Assistant Professor), he joined the Japan Automobile Research Institute (Chief Researcher) in September 2012 and assumed his current position in April 2020. His current main research theme is air environment epidemiology focusing on Traffic Related Air Pollution (TRAP).
Masamitsu Hayasaki
He left the Graduate School of Earth Sciences at the University of Tsukuba with sufficient credits to complete the doctoral program (2000), and then obtained his PhD (Science) from the Department of Earth Environmental Sciences at the Graduate School of Life and Environmental Sciences at the same university (2006). He has worked (PD, specially appointed researcher, etc.) at the National Institute for Environmental Studies, Chiba University Center for Environmental Remote Sensing, Toyama University, Kyushu University, and the University of Tokyo Atmosphere and Ocean Research Institute, before assuming his current position in 2017. His main research themes include elucidating the causes of high-concentration air pollution events.
Akiyoshi Ito
In March 2002, he completed his doctoral studies in environmental resources engineering at the Graduate School of Engineering, Hokkaido University, receiving his PhD (Engineering). He joined the Japan Automobile Research Institute in April 2002, and has held his current position since 2010. His main activities in recent years include the evaluation of the contribution of emission sources to the atmospheric environment, analysis using atmospheric observation results (from continuous monitoring stations, etc.), and analysis using atmospheric simulations (CMAQ, etc.).
*No handouts will be provided.
