The replacement will take place at the Sanyuanqiao overpass on the northeast section of the Third Ring Road, which links the city with Beijing Capital International Airport. It is one of the busiest traffic hubs in the city
The overpass and the section of the Jingshun Highway beneath it will be closed from 11 pm on Friday until midnight on Saturday. Detour lanes for buses have been under construction since September. Automobiles will be prohibited. Workers have prepared buttresses inside and outside the Third Ring Road to prop up the new bridge span and old sections.
As one of the country's largest overpasses and one of the busiest traffic hubs in Beijing, Sanyuanqiao every day sees more than 200,000 automobiles, along with buses from 48 routes carrying 726,000 passengers, according to Qin Dahang, an engineer at Beijing General Municipal Engineering and Research Institute Co.