GAR | GRBP-80-07/Rev.1

Reference document: Measurement Uncertainties when testing

Document GRBP-80-07/Rev.1

18 September 2024

This document for reference might be applied to measurement procedures
used in UN regulations of the Working Party on Noise and Tyres (GRBP).
It supports the definition of limit values during the development of
regulations by transparently presenting the measurement uncertainties
embodied in the measurement procedures during type approval,
conformity of production and other measurement reasons. Replaces GRBP/2024/08

Status: Informal GR review

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Previous Documents, Discussions, and Outcomes

80th GRBP session (17-20 Sep)

3. | UN Regulation No. 51 (Noise of M and N Categories of Vehicles)

79th GRBP session (6-9 Feb)

3. | UN Regulation No. 51 (Noise of M and N categories of vehicles)

5. The expert from the Informal Working Group on Measurement Uncertainties (IWG MU) presented their final report (GRBP-79-02) and a draft document for reference (ECE/TRANS/WP.29/GRBP/2024/8 and GRBP-79-48-Rev.1). During an in-depth discussion, several experts from contracting parties expressed concerns about the formal adoption of the document for reference and its legal status. They pointed out that the document could be misinterpreted as being legally binding and modifying the established sound limits in UN Regulation No. 51. In the absence of consensus, GRBP postponed the discussion to the next session.

7. (d) | UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)

7. (f) | Tyre abrasion

Reference Number:	RDASEPL-06-06b
Meeting Session(s):	6th RDASEPL session (12 Dec)
Document date:	21 Nov 24
Regarding:	UN R41 Motorcycle Noise

Reference Number:	RDASEPL-06-06a
Meeting Session(s):	6th RDASEPL session (12 Dec)
Document date:	21 Nov 24
Regarding:	UN R41 Motorcycle Noise

Reference Number:	RDASEPL-06-03
Meeting Session(s):	6th RDASEPL session (12 Dec)
Document date:	21 Nov 24
Regarding:	UN R41 Motorcycle Noise

Reference Number:	ADS-05-07
Meeting Session(s):	5th ADS session (9-13 Dec)
Document date:	21 Nov 24
Regarding:	Automated Driving

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