# Why Are Some Semi-Trucks Called 'B-Doubles' In Australia?

> The reason why some semi-trucks are called 'B-doubles' in Australia can be traced to the country's National Heavy Vehicle Regulator (NHVR) and its classes of heavy vehicles in the Heavy Vehicle National Law (HVNL).

- **Source:** [SlashGear](https://www.slashgear.com/1901878/why-trucks-called-b-doubles-australia-reason/?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=6869efbda01380e0810dd4ff)
- **Published:** 2025-07-06
- **Category:** Cars
- **Tags:** #australia #called #doubles #heavy #semi #trucks #hvnl #national
- **Canonical:** http://localhost:4321/a/6869efbda01380e0810dd4ff

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_GearOpen's distilled summary. The full original article is published at SlashGear (source link above); GearOpen does not republish the source's full text._