On Apr 18, Asia Piling Co, a sub-contractor carrying out contiguous bored piling works for the North–South Corridor project, damaged several fibre-optic cables, of which one was part of a physical connection transmitting to the ETA server.
“As designed, data was diverted from the damaged cable to the intact cable in that connection pair,” said Mr Siow.
“However, not all data was successfully sent to the server when the incident first occurred. This resulted in a degradation of the ETA system performance, with only 70 per cent of the expected number of ETA predictions throughout the rest of the day.”
The ETA system was restored to full functionality after the fibre-optic cable was repaired, he said, adding that LTA’s investigation revealed no other hardware or software malfunctions in the ETA system.
