Zenitaka Major Works
Tunnel
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Chubu-Odan Obigane No.1 tunnel
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Takamatsu Expressway Shido tunnel
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Princilpal local road Ofunato Ryori Sanriku line Koishihama tunnel (tentative)
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Shin Takeoka Tunnel, Kagoshima Route 3
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Aioiyama St.-Kamisawa St. Section, Nagoya Municipal Subway
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Sugimata Tunnel
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Kegoya Tunnel, National Highway Route 487
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Mori Tunnel, Joshinetsu Driveway