SINGAPORE: SMRT's North-South Line (NSL) and East-West Line (EWL) were afflicted by track circuit faults on Tuesday (Apr 18), resulting in delays for commuters during the morning peak hour.
In a statement, SMRT said the track circuit faults resulted in trains having to travel at a slower speed for commuter safety.
"In the new signalling system that is currently being tested, the ageing track circuits will be replaced with a more advanced system that is more reliable as it is built with multiple redundancies for greater reliability. After we renew the signalling system, faulty track circuits will no longer cause prolonged delays for commuters," said Mr Patrick Nathan, vice president for Corporate Information and Communications at SMRT.
"We apologise for the inconvenience caused to affected passengers."
The train operator first posted about a 10-minute delay due to a track fault on the NSL, between Bishan and Khatib stations towards the Jurong East direction, at 7.19am on its Twitter account.
At 8.35am, it tweeted that commuters on the EWL would also be expecting an additional 10 minutes' travel time from the Paya Lebar to Simei stations towards Pasir Ris due to a track fault.
SMRT said in later updates that the delays were due to track faults at Khatib on the NSL and Simei on the EWL.
As of about 9.40am, the transport operator estimated the additional travel time expected for commuters on the NSL and EWL is 20 minutes and 15 minutes, respectively.
About an hour later, at 10.58am, SMRT said train services from Paya Lebar to Simei, towards Pasir Ris, resumed. It then sent out another tweet at 11.19am saying that additional travel time was down to five minutes from Bishan to Khatib on the NSL, and it is still working to recover the service.
SMRT said at 12.41pm that train services from Bishan to Khatib has resumed.