The bridge, built to withstand a magnitude 8 earthquake, will open to traffic on Wednesday. The 55-kilometer (34-mile) bridge which was originally due to open in 2016 is the longest of the world bridge crossing the sea. The construction used 400,000 tons of steel and took 9 years to build. It is part of a plan to make a Greater Bay Area covering 56,500 square kilometers (21,800 square miles), including 11 cities in southern China.
Seven workers died and more than 270 were injured during construction. Extra marine parks will be created to protect aquatic life. As drivers cross the bridge their heart rate and blood pressure will be monitored. The information will be sent to the bridge’s control center. Hong Kong media have also reported there will be cameras monitoring drivers as they cross the bridge. The bridge is considered mainland Chinese territory. People from Hong Kong will need special permits to drive across the bridge. There is no public transport on the bridge. n 2016, Hong Kong saw 56.7 million tourist arrivals, compared to 37.6 million for the UK. Another bridge is being built between nearby Shenzhen and Zhongshan, just north of Zhuhai.