The section runs from Nguyen Dinh Thi to Trich Sai streets. Decorative lighting is also being installed.
The new railings are 1.1-1.4 metres high.
The work will cost VND12 billion (USD483,470).
The old railings installed around Hanoi’s largest lake have deteriorated. Earlier, the section of railings from Lac Long Quan to Nguyen Dinh Thi streets were replaced.
People still go fishing in the lake.
Parts of railings that feature Khue Van Cac, the Constellation of Literature pavilion inside the Temple of Literature in Hanoi, remain in place.
West Lake is a popular site in the capital for visitors and locals.