There will be a longer wait for KTM Komuter trains during off-peak hours, beginning from May. While the peak period schedule will remain the same, with 15-minute intervals between trains, the frequency during off-peak hours will be an hour instead of the half-an-hour interval in place currently, The Star reports.

The rail operator said that the rescheduling is to facilitate upgrades being carried out for the Komuter lines in the Klang Valley. These upgrades will take place in several stages starting from May or June, KTM president Datuk Sarbini Tijan told the publication.

He added that this did not mean riders on the Komuter’s two lines – Seremban and Port Klang – will experience hour-long waits for trains in all locations. Only certain parts of the railway will see this rescheduling, with the rest of the route running normally.

“We’re doing it phase by phase. At any one time, we only anticipate 20% of the passengers to be affected when they are using the Kommuter services,” he told The Star. The Rawang-Batu, Batu-Port Klang and Port Klang-Salak Selatan routes are set to be upgraded.

The upgrades are part of a long-term project known as the Klang Valley Double Track infrastructure and systems upgrading, which will see work being carried out on the network’s double-tracking, signalling and communications systems. This will include the changing of track components and carrying out track rehabilitation as well as upgrading the train detection system and circuit breakers.