Keretapi Tanah Melayu Bhd (KTMB) said the delays have affected the KTM Komuter services on the Pulau Sebang (Tampin)-Batu Caves, and Pulau Sebang-Tanjung Malim-KL Sentral routes, as well as ETS services.

The works were being carried out between the Kepong and Salak Selatan stations to ensure a more efficient and safer signalling system, Bernama reported KTMB as saying in a statement.

KTMB said the works were part of Phase 1 of the Klang Valley Double Track (KVDT) infrastructure upgrade project.

Phase 1 of the KVDT project, which began in 2015, involves the rehabilitation of tracks and railway systems along the Rawang-Salak Selatan and Simpang Batu-Sentul routes, covering 110km.

Phase 2, covering a 140km stretch from Salak Selatan to Seremban, and Kuala Lumpur to Port Klang, began in February 2023 and is expected to be completed by 2029.

Since the start of the track rehabilitation and upgrade works, KTM Komuter services have been operating at 30-minute intervals, as only a single track is available in the sections under repair.

The upgraded signalling system is expected to reduce train service intervals.

KTMB’s chief operating officer, Zain Mat Taha, extended the company’s apologies to passengers affected by the delays.