The Land Transport Authority (LTA) and SMRT have detailed a series of measures to prevent rail cracks in response to cracks on the network in recent weeks.
A rail crack surfaced again on the North-South Line, affecting south-bound train services during the morning peak period yesterday.
Train operator SMRT has imposed a speed restriction of 40km/h on a stretch of the North-South Line that is affected by a rail crack.
Preliminary investigations by SMRT have revealed two recent occurrences of rail cracks to share three similarities between the incidents.
Delay in train service on North-South Line was caused by the second of similar incidents in two months - a crack on the train track.
A section of the northbound track that was found with a crack has been replaced, but causes are unknown and still being investigated.
Northbound trains yesterday were delayed and hampered evening rush hour traffic, after a crack was found on the track.