Safety concerns surrounding heavy vehicles have resurfaced as industry insiders warn that speed limiters, though mandated in new commercial buses and lorries, can be bypassed by trained technicians. This vulnerability has prompted calls for a more comprehensive approach to vehicle safety.

According to NST, a technician from a local bus manufacturing firm stated that modern speed limiters are embedded within the Electronic Control Unit (ECU) of heavy vehicles and rely on sensor inputs to regulate speed. However, the technician revealed that former service centre mechanics may still possess the software required to alter or deactivate the system and could offer such services discreetly through private workshops.

Given this loophole, the technician stressed the critical role of global positioning systems (GPS). As a standard feature in newly registered vehicles under the Land Public Transport Agency (APAD), GPS units are typically integrated with the speed limiter system. Unlike limiters, GPS-linked systems can accurately log and monitor a vehicle’s speed and alert operators of any infractions, making tampering more detectable.

Industry figures have also drawn attention to the broader technological framework within heavy vehicles. Thayalan Subramaniam, General Manager of MAN Truck and Bus Malaysia, noted that their vehicles’ speed limiters are also embedded in the ECU and set in accordance with regulatory guidelines — 89km/h for lorries and 100km/h for buses. He assured that MAN uses advanced diagnostic tools with updated security patches to prevent unauthorised system modifications. Nevertheless, he acknowledged that tampering can only be detected during a formal vehicle inspection at authorised workshops.

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