# Council Regulation (EEC) No 3821/85 of 20 December 1985 on recording equipment in road transport, Division 2: Speed and distance measurement

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

017 This function shall continuously measure and be able to provide the odometer value corresponding to the total distance travelled by the vehicle.
018 This function shall continuously measure and be able to provide the speed of the vehicle.
019 The speed measurement function shall also provide the information whether the vehicle is moving or stopped. The vehicle shall be considered as moving as soon as the function detects more than 1 imp/sec for at least five seconds from the motion sensor, otherwise the vehicle shall be considered as stopped.
Devices displaying speed (speedometer) and total distance travelled (odometer) installed in any vehicle fitted with a recording equipment complying with the provisions of this Regulation, shall comply with the requirements relating to maximum tolerances laid down in this Annex (Chapters III(2)(1) and III(2)(2)).
019a To detect manipulation of motion data, information from the motion sensor shall be corroborated by vehicle motion information derived from one or more source(s) independent from the motion sensor.

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