Neither, it seems, does it bother his buddy officers from the armed forces who signed on with the gravy train. The metallurgical crack in the rail was detected as early as 7.30 pm, but 4 hours later, the SMRT spokesman (probably one of those army guys) would only say, "We are still trying to find out more about what happened." Worse, the lame SMRT twit who tweeted at 8.30 pm, "unfortunately sometimes there are machine faults that we do not expect," failed to comprehend that a static steel rail lying on the ground is definitely not a moving machine component. Seng Han Tong, who drew lots of flak for criticising the English spoken by Malay and Indian SMRT staff, had apologised by saying that bad English should not prevent people from trying to communicate, especially in times of emergency. But that's no excuse for one of Lieutenant General Demond Kuek's expensive hires.
A cracked rail can throw a train, as in the Leeds to London derailment of October 2000 that killed 4 and injured 30. An expert at the Committee of Inquiry commissioned by the Government had actually warned that a faulty track could cause trains to derail. That real-world rail operators paid more attention to flaws on the tracks than power supply systems.
The humble e-clips are responsible for fastening the rail to the base plate so the rail cannot move vertically or horizontally. If the rail is permitted to slide through the plates then compressive or tensile forces build up to either cause a pull-apart (rail break) or a track buckle, which causes derailments. That's when the proverbial shit hits the fan.