Abstract

Vibration characteristics of motor vehicles and driver's reaction during an earthquake are studied through questionnaire to the drivers who were in driving in a region with the JMA seismic intensity of V during the Nihon-kai-chubu Earthquake of 1983 and the Chiba-ken-oki Earthquake of 1987. Emphasis is placed on driver's recognition of earthquake, the reason why drivers recognized the earthquake and driving situation during the earthquake.It is concluded from the study that degree of driver's recognition of an earthquake highly depends on driving situation. Approximately fifty percent of the total drivers immediately recognized the outbreak of the earthquake from the abnormal vibration of vehicles, followed by swinging of electric poles and street signs, and vibration of houses.

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