The world’s longest sea crossing, which connects Hong Kong, Zhuhai and Macao, has now opened to the public. The bridge spans over 55 km (34 miles) and includes 23 km of bridges, 6.7 km of tunnels, and two artificial islands. The new construction cuts the time of road travel between Hong Kong and Zhuhai from four hours to just 40 minutes. However, drivers can only access the bridge after receiving a special permit from the authorities.