# Council Regulation (EEC) No 3821/85 of 20 December 1985 on recording equipment in road transport, Division 2.1: Measurement of distance travelled

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

020 The distance travelled may be measured either:
so as to cumulate both forward and reverse movements, or
so as to include only forward movement.
021 The recording equipment shall measure distance from 0 to 9 999 999,9 km.
022 Distance measured shall be within the following tolerances (distances of at least 1 000 m):
± 1 % before installation,
± 2 % on installation and periodic inspection,
± 4 % in use.
023 Distance measured shall have a resolution better than or equal to 0,1 km.

---
Source: https://www.legislation.gov.uk/eur/1985/3821/annex/2/division/III/division/2/division/2.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-1985-3821/annex-2/division-III/division-2/division-2.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.