The steel box girder for Section 9 of Zhengzhou Longhai fast road project, fabricated by China Railway Baoji Bridge (Tianyuan) Co., Ltd, was successfully closed recently.

The Section 9 of Zhengzhou Longhai fast road project is an interchange of two fast roads, Longhai Road and Zhongzhou Avenue. The interchange is a five-layer semi-directional bypass and cloverleaf intersection. The so-called interchange is to permit traffic to move freely from under the junction to any road above the junction or from the junction down to the ground surface of any crossroad. The interchange's first layer is Huozhan Street through the culvert of Zhongzhou Avenue; the second layer is current roadway; the third layer is Zhongzhou Avenue spanning Huozhan Street; the fourth layer is the ramp connecting the third layer and the fifth layer; and the fifth layer is the main structure of viaduct of Longhai Road. The altitude difference between the highest layer and the lowest layer is 29.6m.