Zhuhai airport high-speed north extension line, this project is located in zhuhai doumen district, route is about 7.0 km, bidirectional eight-lane, roadbed width of 65.5 m; The main road adopts two-way four-lane expressway standard with a design speed of 100 km/h, and the secondary road adopts urban trunk road standard with a design speed of 60 km/h. The estimated total investment is 1.81 billion yuan.