Jiangbin Road Underpass Chengzhong Road Underground Tunnel Project in Jiangshan City, Zhejiang Province

        The construction project of the underground passage under Jiangbin Road and Chengzhong Road starts from Jiangjin Road in the south and ends at Zhongshan Road in the north, with a total length of 1.2 kilometers. The road intersects with Jiangjin Road, Huancheng South Road, Chengzhong Road, Tongning Road, and Zhongshan Road along the way. In addition to being a convenient transportation route, it is also a key municipal priority project for "urban balcony". The designed speed of the road section is 40 kilometers per hour, of which the total length of the underpass for motor vehicles is 515 meters. The tunnel section has four lanes in both directions and adopts a 4-hole form, with two inner holes for motor vehicles and two outer holes for non motor vehicles.