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Maintenance


Sasago Tunnel Ceiling Collapse on the Chuo Expressway (PDF)

Incident summary, MLIT's response, Nationwide Urgent Inspection of Tunnel Ceiling Panels and “Research & Examination Committee for Tunnel Ceiling Collapse Incident

The Maintenance of National Road Network in Japan (PDF)

Road stocks in Japan, fiscal situation in Japan and maintenance and management of road stocks
 
 
 
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