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Under the current General Vehicle Regulations, Annex IX, what is the maximum mass per axle group for a semi-trailer’s three-axle tandem group with 1.35 m between each pair of consecutive axles?

Correct answer

27 tonnes.

27 tonnes. For a trailer or semi-trailer’s three-axle tandem group, Annex IX specifies 21 tonnes when d is at most 1.30 m and 27 tonnes when 1.30 m < d ≤ 1.40 m. A 1.35 m spacing falls in the second interval. This is an axle-group limit; it does not replace other vehicle or combination limits or lower authorised values in its documents. The old answer of 24 tonnes is outdated for this group.

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  • 21 tonnes.

  • 20 tonnes.

  • 27 tonnes.

The real exam in English is a translation of the Spanish original; compare both here.

Show the Spanish original

Según el anexo IX vigente del Reglamento General de Vehículos, ¿cuál es la masa máxima por grupo de ejes de un tándem triaxial de un semirremolque cuya separación entre cada par de ejes consecutivos es 1,35 m?

  1. 21 toneladas.
  2. 20 toneladas.
  3. 27 toneladas.(Correct answer)

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