Circle Line Tunnel Reinforcement Works Update

Oral Reply by Acting Minister for Transport Jeffrey Siow

Mr Gerald Giam Yean Song asked the Acting Minister for Transport

a.           what is the current percentage of steel rings installed for the Circle Line tunnel reinforcement works;

b.           whether any technical issues have been encountered to date; and

c.           whether the Ministry can bring forward the April 2026 completion date to reduce the daily 10 to 20 minute travel delay per trip for affected commuters.

Reply by Acting Minister for Transport Jeffrey Siow:

1.           The tunnel strengthening works for the Circle Line are progressing as planned. As at end-February 2026, about 50% of the required steel rings have been installed.

2.           Works are being carried out at a pace that will ensure the safety of our workers and commuters, and we remain on schedule to complete them by 19 April 2026, which is what we have committed. We will continue to monitor and adjust our train and shuttle bus services to minimise inconvenience to commuters.