The phased rollout starts on Oct 1 for tour buses, express buses, and heavy goods vehicles registered from 2015 onwards, which must undergo functionality checks and obtain certification from the approved bodies.

For older commercial vehicles registered before 2015 that already have SLD functions in their electronic control units, enforcement will begin on Jan 1, 2026. These vehicles must activate the system and present proof of compliance.

Vehicles without SLD systems, including goods vehicles over 3,500kg and passenger vehicles carrying more than eight people and weighing over 5,000kg, must install the device retroactively by July 1, 2026.

Loke said factory inspections for speed-limiting systems, known as conformity of production, had started in April for vehicle models with vehicle type approvals issued from 2015 onwards.

“The maximum speed limit for all bus and heavy vehicle types has been fixed at 90km/h,” he said in a statement today.

Loke said the enforcement in stages aimed to raise safety standards in the commercial transport sector and reduce the number of fatal accidents involving heavy vehicles.

“The ministry urges full cooperation from all industry players, manufacturers, logistics operators, and commercial vehicle owners to help build a safer, modern, and competitive transport system, in line with the Malaysia Madani agenda and road safety objectives,” he said.