Orderer West Nippon Expressway Co., Ltd.
Completion 2017
Structure and scale NATM method, excavation cross-section: 71m²; tunnel length: 1,340m
Location Tokushima Prefecture
Application Road tunnel

This is work for widening of the provisionally two-lane Takamatsu Expressway (Takamatsu to Naruto) that is in service to four lanes. There is much traffic, and the work is being done for the purpose of alleviating accidents and congestion.