Safe Limits for Carrying Goods During Holiday Travel; No Need to Load the Roof

Solo — Loading vehicles excessively, including stacking cargo on the roof during mudik, is a common practice to save interior space. However, this habit carries numerous safety risks often unnoticed by drivers.

Additional weight on the vehicle’s upper sections can affect stability, control, and safety during long journeys.

Ahmad Wildan, head of the Land Transport Traffic Subcommittee of the National Transportation Safety Committee (KNKT), stated that the safe loading limit for vehicles is to not exceed seating capacity and to avoid carrying goods on the roof.

When goods are placed on the roof, the vehicle’s centre of gravity rises, positioning the load higher than normal. This makes the vehicle more prone to sway, particularly when navigating curves, uneven roads, or during sudden manoeuvres.

Additionally, roof-mounted cargo increases rollover risk. When a vehicle turns at certain speeds, the load above amplifies the lateral force pulling the vehicle sideways. This risk intensifies if the cargo is too heavy or inadequately secured.

“Excessive loading also compromises a vehicle’s braking ability. Increased vehicle weight extends braking distance. In emergencies, the vehicle may require significantly longer to stop,” Wildan stated.

Moreover, the vehicle’s suspension and other components work harder than their normal capacity. Overloading can accelerate damage to springs, shock absorbers, tyres, and even the vehicle frame. During long journeys like mudik, such damage can occur suddenly.

Another risk involves altered vehicle aerodynamics. Cargo stacked on the roof creates unstable airflow, leading to increased fuel consumption.

“The engine must work harder to maintain speed when air resistance increases due to roof-mounted cargo,” said Imun, owner of Ford Truck Specialist Workshop in Klaten, speaking to the publication on Friday (13 March 2026).

“Ensure weight distribution remains balanced. Heavier items should be placed in the vehicle’s lower sections, not on the roof. This helps maintain stability during travel,” Imun advised.

By observing proper loading limits and correct cargo placement methods, mudik journeys can be safer and more comfortable.

Safety must be the top priority, as even minor risks from overloading can have serious consequences for drivers and other road users.