begin or pass through in Qingdao. Expressways that begin in Qingdao are in Bold: G15 Shenhai Expressway (Shenyang, Liaoning-Haikou, Hainan) G18 Rongwu Expressway (Rongcheng, Shandong-Wuhai, Inner Mongolia) G20 Qingyin Expressway (Qingdao-Yinchuan, Ningxia) Spur Route: G2011 Qingxin Expressway (Qingdao-Xinhe, Pingdu, Shandong) G22 Qinglan Expressway (Qingdao-Lanzhou, Gansu) These provincial expressways begin in or pass through Qingdao. Expressways that begin in Qingdao are in Bold: S16 Rongwei Expressway (Rongcheng-Weifang) S19 Longqing Expressway (Longkou-Qingdao) S21 Xinwei Expressway (Xinhe-Weifang) S24 Weiqing Expressway (Weihai-Qingdao) Other than Expressways, there are also National Highways that pass through or begin in Qingdao. National Highways that begin in Qingdao are in bold: G204 (Yantai-Shanghai) G206 (Yantai-Shantou) G308 (Qingdao-Shijiazhuang) G309 (Rongcheng-Lanzhou) On 30 June 2011, the longest bridge over water opened in Qingdao. The bridge, Haiwan Bridge, is long and connects Qingdao to Huangdao and Hongdao. It would easily cross the English Channel and is almost three miles () longer than the previous record-holder, the Lake Pontchartrain Causeway in the American state of Louisiana. Haiwan Bridge is supported by more than 5,000 pillars and costs about 10 billion yuan which is about 1.5 billion dollars. The bridge was designed by the Shandong Gausu Group and the construction lasted for four years. Haiwan Bridge cut the commute between the city of Qingdao and the sprawling suburb of Huangdao by 30 minutes. At least 10,000 workers toiled in two teams around the clock to build the bridge, which was constructed from opposite ends. On the same day, the Jiaozhou Bay Tunnel opened. The tunnel brought much convenience to people by supporting public buses and making transport between the two areas more convenient. Marine Qingdao (official name: Qingdao port international co. ltd.) hosts one of the world's busiest seaports. Cooperative relations have been established with 450 ports in 130 countries worldwide. The port of Qingdao is part of the 21st Century Maritime Silk Road. In 2003, the annual cargo handling capacity exceeded 100 million tons for the first time. The number of containers reached of cargoes. By 2011, the port had become the world’s sixth-busiest by Total Cargo Volume, having handled of cargo in that year. As of 2016, it was the 8th in the world in terms of TEUs (Twenty Foot Equivalent Units). The Orient Ferry connects Qingdao with Shimonoseki, Japan. There are two ferry lines connecting Qingdao with South Korea. The New Golden Bridge II operates between Qingdao and Incheon, and the