Line 3 starts from Jinhai Road station as a elevated line. It goes north behind the Airport Road until Chaoyang station and turns into east direction on Yanhu Road to Shishan station. Then it turns north again and underground into Gaotang Bridge Station. Then it turns into east-west direction on Yinzhou Avenue and makes a further turn into Ningnan South Road and goes in north-south direction again until it reaches Songjiang Middle Road. Then it runs to northeast to Qiubi and then crosses the Ningbo–Taizhou–Wenzhou railway from which it goes in north-south direction and extends along Zhongxing Road until it crosses Yongjiang River and reaches its destination, Datong Bridge Station.[4]
Phase 2 of line 3 will have 5 more stations north of Datong Bridge, but due to restrictions of an old airport, part of the phase 2 between Datong Bridge and Yongmao Road is stalled for construction.[5] The rest 3 stations of phase 2 has started construction since 2 December 2019,[6] and will temporary run trains of line 5 until phase 2 of line 5 completed. Test run of phase 2 of line 3 started in 1 February 2024.[7]
^"我委批复轨道交通3号线一期工程可行性研究报告". Ningbo Municipal Development & Reform Commission (in Chinese). November 3, 2014. Archived from the original on November 4, 2014.