# Regulation (EU) 2020/740 of the European Parliament and of the Council of 25 May 2020 on the labelling of tyres with respect to fuel efficiency and other parameters, amending Regulation (EU) 2017/1369 and repealing Regulation (EC) No 1222/2009, Division 4: Procedure for the alignment of a reference laboratory to the assigned values

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

Each reference laboratory (l) shall align itself to each new set of assigned values and always after any significant machine change or any drift in machine control tyre monitoring data.
The alignment shall use a linear regression technique on all individual data. The regression coefficients, A1 l and B1 l , shall be calculated as follows:
RRC = A1 l × RRCm,l + B1 l
where:
RRC is the assigned value of the rolling resistance coefficient;
RRCm, is the individual measured value of the rolling resistance coefficient by the reference laboratory ‘l’ (including temperature and drum diameter corrections).

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Source: https://www.legislation.gov.uk/eur/2020/740/annex/V/division/4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2020-740/annex-V/division-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.