All existing MRT lines to have system to detect overheating train axle boxes by 2028

In Singapore, all existing Mass Rapid Transit (MRT) lines will be fitted with a system to detect overheating train axle boxes by 2028, according to a Facebook post from the Land Transport Authority (LTA) on Aug 3. The North-South, East-West, Circle, Thomson-East Coast, Downtown, and North East lines will have this system installed, along with the upcoming Jurong Region Line (JRL), which is set to commence operations in stages between mid-2028 and 2029.

The system will be installed on the JRL by end-2030, with a new station between Tengah and Choa Chu Kang expected to open in the mid-2030s. The JRL contract was awarded to Chengdu Shengkai Co. for $12.5 million. The system uses infrared sensors to monitor axle box and gearbox temperatures of passing trains, alerting rail operators to any abnormal temperature increases so they can take necessary recovery steps.

This will replace existing systems to standardise designs and parts used, streamlining spare parts management and technical support. Hot axle detection systems are currently installed by SMRT on the North-South and East-West lines, and by SBS Transit for the North East Line. Two additional systems will be installed alongside the new detection system: an acoustic detection system to spot early-stage damage to axle bearings and a hot wheel detection system to monitor wheel temperatures.

These measures aim to improve fault detection capabilities. The major six-day rail disruption on the East-West Line in September 2024 was caused by an overheated axle box, highlighting the importance of this new system.