Circle Line's signalling woes caused by rogue train with faulty signalling

It was not telco interference, sabotage nor some paranormal activity that caused the Circle Line to fail over several days recently. It was in fact a rogue train, which had a faulty signalling hardware.

The train No. 46, was put into service only last year. It has since been taken out of service. The Land Transport Authority said no other train has been found to have this fault but it is doing more checks.

The Straits Times understands engineers at the Defence Science and Technology Agency helped to crack the mystery of the signalling fault that caused train service on the Circle Line to be disrupted.