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“Expressway tunnels as well as other infrastructure throughout Japan are nearing the crisis stage,” warns a university professor who is a member of an advisory body for the Ministry of Land, Infrastructure, Transport and Tourism.

Among the repercussions of the Dec. 2 ceiling collapse in the Sasago Tunnel on the Chuo Expressway (Yamanashi Prefecture) — the accident crushed three motor vehicles and killed nine people — is the ministry’s order to carry out emergency checks of all similar tunnels in Japan.

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