On Tuesday ( Feb 11 ), there were delays at the Paya Lebar and Marymount MRT stations on the Circle Line due to a signaling issue.
In a Twitter post at 10.20am, station operator SMRT said that the signal sin, which began at around 8.11am, affected teach operations at eight facilities.
According to the statement,” the problem caused trains to stop, and energy to the affected business was tripped,” adding that teach action resumed at 8.30am after the electricity was restored within five minutes.
SMRT also said a” sluggish”  , Central Automatic Train System affected controllers ‘ ability to manage train movements efficiently. The Circle Line all returned to normal company after about 30 days.
” During the day peak, important interchange facilities such as Serangoon, Buona Vista, Botanic Gardens, and Bishan usually require one to two carriages to clear masses”, said SMRT.
” Due to this delay, it took about three trains to ease congestion”.
The operator claimed that station staff was working to assist commuters and that the affected stations had made public announcements.
SMRT added that , French train maker ALSTOM , has developed a software patch to address this issue. The patch is scheduled to be installed on Saturday.
” We apologise for any inconvenience caused to commuters”, it said.