Two-wheel drive vehicle stuck in an experiment with tires buried = November 2021, Fujiyoshida City, Yamanashi Prefecture (provided by Mt. Fuji Research Institute, Yamanashi Prefecture)

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Two-wheel drive vehicle stuck in an experiment with tires buried = November 2021, Fujiyoshida City, Yamanashi Prefecture (provided by Mt. Fuji Research Institute, Yamanashi Prefecture)

A car that examines how to apply the brakes in an experiment = October 2021, Fujiyoshida City, Yamanashi Prefecture (provided by Mt. Fuji Research Institute, Yamanashi Prefecture)

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A car that examines how to apply the brakes in an experiment = October 2021, Fujiyoshida City, Yamanashi Prefecture (provided by Mt. Fuji Research Institute, Yamanashi Prefecture)

By the 23rd, research groups such as the Mt. Fuji Research Institute in Yamanashi Prefecture have summarized the experimental results that two-wheel drive vehicles cannot move if volcanic ash accumulates to a thickness of 12 cm. Mitsuhiro Yoshimoto, a senior researcher, said, “If one car stops, the road cannot be used. For restoration, please do not use the car for evacuation.”

The experimental results are expected to be used for the revision of the evacuation plan promoted by the “Mt. Fuji Volcano Disaster Prevention Measures Council” created in Yamanashi, Shizuoka, Kanagawa and other prefectures.

In a park at the foot of Mt. Fuji, volcanic ash and pebbles called “scoria” were laid in the parking lot from October to November last year, and an experiment was conducted to resemble the road after the eruption.