Half of piling work on foundation of N-S Corridor viaduct completed

Section running from Admiralty Road West to Lentor Avenue set to be ready in 2027

- Esther Loi

Half of the piling work on the foundation of an 8.8km viaduct section of the North-South Corridor (NSC) has been completed, said the Land Transport Authority (LTA).

Mr Chris An, a deputy director for the NSC at LTA, said these works began in the last quarter of 2021 and have since progressed across the entire viaduct.

Above-ground structural works on the viaduct also started along certain stretches of Lentor Avenue and Sembawang Road in the second quarter of 2023, LTA told The Straits Times.

These works include installing columns and crossheads, which are horizontal beams on top of pillars that support the viaduct.

Mooted as an expressway in 2008 and redesigned as a "transit priority corridor", with dedicated bus lanes and cycling trunk routes in 2016, the 21.5km NSC will cut travel time from Woodlands, Sembawang, Yishun and Ang Mo Kio to the city by up to 30 minutes when completed.

Comprising an 8.8km viaduct, 400m of ground-level roads and 12.3km of underground road tunnels, the corridor will be completed in phases from 2027.

The viaduct, running from Admiralty Road West to Lentor Avenue, is expected to be ready in 2027, followed by the road tunnels - from Lentor Avenue to East Coast Parkway - which will be completed in 2029.

The authorities have incorporated several time-saving steps into the viaduct's construction.