Plans are being drawn up for the project to drive a new undersea tunnel in Southern China to improve transport links between Shenzhen and Guangzhou. The tunnel itself will be around 1.1km long but the project will also include building a 4.45km stretch of road in the Dachan Bay area and a 2.5km stretch of road in Qianhai. The project is expected to cost US$1.67 billion, with construction work due to commence later in 2018 and planned to take 36 months to complete. Once the tunnel link is ready for use, it will improve traffic connections between the ports of Shekou, Chiwan and Mawan. Much of the traffic using the route is expected to comprise goods vehicles and the link will help reduce congestion on existing roads in the area.