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What is the permitted total towing mass for large passenger vehicles?

1 Answers

JuliaRose

07/30/25 5:48am

Large passenger vehicles are not permitted to tow. The approved total towing mass refers to the combined weight of the trailer and cargo being pulled. This is a theoretical value, also known as the 'nominal towing tonnage'. The total mass of the vehicle and towed object refers to the sum of the vehicle's mass plus the mass of the towed object, with the towing force being exerted on this total mass. Therefore, when calculating the total towing mass tonnage, the mass of the towed object should not be considered solely as the nominal towing tonnage. Notes on approved total towing mass: 1. License total mass: Refers to the vehicle's curb weight + approved passenger capacity (calculated as number of passengers × average weight of 65kg per person). 2. Curb weight: The vehicle's own mass. 3. Certified loading mass: The standard cargo loading mass specified in the vehicle design. 4. Approved total towing mass: Refers to the maximum total mass a semi-trailer can tow (including both the towed vehicle and cargo mass). This is the sum of three components: the tractor head mass (excluding driver and fuel), the towed vehicle's own mass, and the cargo loading mass.

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