# Commission Delegated Regulation (EU) 2015/68 of 15 October 2014 supplementing Regulation (EU) No 167/2013 of the European Parliament and of the Council with regard to vehicle braking requirements for the approval of agricultural and forestry vehicles (Text with EEA relevance), Division 6.2.1

Extent: E+W+S+N.I.

Towed vehicles equipped with an anti-lock braking system shall be deemed acceptable when the condition ε ≥ 0,75 is satisfied, where ε represents the adhesion utilised, as defined in point 2 of Appendix 2. This condition shall be verified with the vehicle unladen, on a straight and level road with a surface having a good coefficient of adhesion.
If the coefficient of adhesion of the test track is too high, preventing the anti-lock braking system from cycling then the test may be carried out on a surface with a lower coefficient of adhesion.
In the case of trailers fitted with a brake load sensing device the pressure setting may be increased to ensure full cycling.

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Source: https://www.legislation.gov.uk/eur/2015/68/annex/XI/division/6/division/6.2/division/6.2.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2015-68/annex-XI/division-6/division-6.2/division-6.2.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.