Relationship between Traffic Volume, Vehicle Velocity, and Sudden Braking on Residential Roads used as Detours when Traffic Jam occurs on Main Line Roads

When main line roads are traffic jam, many vehicles move into residential areal roads. Using ETC2.0 data, the authors analyzed the increase or decrease in vehicle traffic volume and the frequency of sudden braking on residential roads. However, previous studies have not clarified the relationship between vehicle traffic volume and sudden braking. Therefore, in this study, the authors attempted to clarify the relationship between vehicle traffic volume on residential areal roads that increases during traffic jams on main line roads, vehicle speeds, and the occurrence of sudden braking through an analysis using ETC2.0 data. It was also revealed that an increase in vehicle traffic volume on residential areal roads was contributing to a decrease in their safety.