PETALING JAYA: The instability in the Kelana Jaya LRT Line's automatic train control system (ATC) has been temporarily resolved and service frequency is back to normal on Tuesday (Nov 8), says operator Rapid Rail Sdn Bhd.
UPDATE: Kelana Jaya LRT line suffers another disruption Nov 8 evening
On Monday (Nov 7) evening, it was forced to terminate services an hour earlier than usual as it decided to focus on resolving the instability in the ATC, which is the nerve centre that controls all train movements on this fully-automated line, Malaysia's first driverless train line.
"The instability surfaced on Saturday, forcing trains to be manually driver between the KLCC and Ampang Park stations, causing trains to stop longer than usual at platforms, and disrupting the entire schedule of the Kelana Jaya Line," said Prasarana Malaysia Bhd CEO Mohd Azharuddin Mat Sah at a press conference at the Rapid Rail headquarters here.
After service hours late Saturday, the technical team updated the software of the ATC, and tested it seven times, and found it to be stable enough for service the following day.
"However, the problem resurfaced at 10.34am Monday. At 1.10pm, trains between KLCC and the Kelana Jaya stations were halted to allow the technical team to rectify the ATC. The same problem was also detected at 8.39pm, again disrupting services between the same stretch," said Mohd Azharuddin.
He added a decision was then taken to stop services between Ampang Park and Kelana Jaya at 10.15pm, more than an hour earlier than usual.
He said that bridging bus services were provided at the affected locations until 1am.
The exact cause of the disruption is still being looked into together with the signalling provider, Thales Group of Canada.