A view of the entrance to the tunnel of Huangmugang Transport Hub, which opened to traffic Tuesday. The tunnel, spanning 993 meters, lies above the transport hub and under an overpass and ground traffic. It was designed at 60 kilometers per hour and is expected to relieve traffic congestion in the Huangmugang area. The hub covers 169,000 square meters, with a floor space of 194,000 square meters. It is China’s first hub that integrates an overpass, a Metro station and a tunnel.  Ou Yijun