Consolidated version integrating GRBP/2022/13, GRBP/2022/16 and GRBP-76-09 as adopted during the 76th GRBP session and including corrections and clarifications per GRBP/2023/12.

Agenda for review of the informal group status report to GRBP. The session separately includes a workshop on water depth measurement.

Draft proposal to introduce a new Annex 10 (“Estimation of the calculation of the expanded measurement uncertainties for sound measurements of Annex 3 for vehicles of category M and N”) to provide tables showing the measurement uncertainties when performing type-approval, Conformity of Production, and/or field testing (e.g. market surveillance). This work is associated with the “Document for Reference” which describes a general approach to estimating measurement uncertainties (GRBP/2022/9/Rev.1 pending consideration of Revision 2).

Proposal for improvements to the draft Revision 2 to GRBP/2022/9.

Proposal to address inconsistency between UN R51 noise limits and AVAS sound levels under UN R138.

Proposal from the Informal Working Group on Measurement Uncertainties (IWG MU) to amend UN R51 with tables showing the measurement uncertainties when performing type-approval, COP, or field testing (e.g. market surveillance).

The measurement uncertainties developed in this Appendix are based the IWG MU work and its Document for Reference which describes a general approach to estimate measurement uncertainties (GRBP/2022/9/Rev.2). The impact of the quantities on the expanded uncertainty has been evaluated separately for run-to-run, day-to-day, vehicle-to-vehicle and site-to-site variations. Some of the different impacts are based on calculations from tolerances in Annex 3, while others are based on experiences.

Proposal from the Noise Measurement Uncertainties informal group for amendments to Annex 3.

Proposal to clarify the details of the data-handling during the monitoring phase required in paragraph 5.1.1.

Request to allocate time on the agenda of the 78th session for consideration of performance requirements for tyres used on heavy-duty pickup trucks designed for professional tasks on rough terrains.

Report on the status of work to update the ISO standard “Acoustics — Measurement of sound emitted by road vehicles of category M and N at standstill and low speed operation — Engineering method”.

Participation in the water-depth measurement workshop session.

Workshop on water depth measurement.

Based on input from Germany, Switzerland, the Netherlands, and OICA.

Third water-depth measurement workshop.

This document is also available with comments.

Proposal to introduce measures to reduce variability in noise measurement.

Proposal to complete the additional sound emission provisions’ table of the communication form in the 05 series of amendments to UN R41 to avoid oversight in data collection and entries.

Proposal to allow using the state-of-the-art test track from the latest standard ISO 10844:2021.

Proposal to allow using the state-of-the-art test track from the latest standard ISO 10844:202

Proposal to allow using the state-of-the-art test track from the latest standard ISO 10844:2021.

Proposal to provide industry guidelines on anti-tampering provisions for Non-Original Replacement Exhaust Silencing Systems (NORESS) in UN Regulation No. 92.

Proposal from the Measurement Uncertainties informal group to introduce measures to reduce variability in noise measurements.

Proposal from the Noise Measurement Uncertainties informal group to update provisions related to temperature sensitivity.

Proposal from the informal group on Measurement Uncertainties, superseding the proposal in document GRBP/2023/19.

Submitted by the Chair of informal group on Measurement Uncertainties.

Proposal for a reference document concerning a general approach for how to handle measurement uncertainties under UN Regulations within the purview of GRBP.

This proposal concerns to amendments to Annex 7. The proposed changes regarding sound enhancement systems are based on the 03 series of amendment up to Supplement 9. In addition, some clarifications concerning power definition and temperature correction have been included based on experiences with the last changes of this regulation.

Status report of the task force on the 02 series of UN R138.

Consolidated text prepared by the QRTV task force (for information).

Proposal to transition test facilities from ISO 10844:2014 to ISO 10844:2021 by January 2029.

Comments concerning:

• AVAS Pause Switch
• AVAS Sound Pressure Levels
• Maximum AVAS Sound Pressure Level
• AVAS Sound when vehicle stationary

Small group (France, Netherlands, ETRTO, BIPAVER) proposal to restructure retreaded tyre requirements and regulations.

Proposal to amend rolling resistance provisions with regard to heavy-duty-use light trucks.

Proposal to update the whole vehicle approval with regard to the series of amendments to UN R12, 46, 48, 110, 117, 127, and 135.

Main body and Annex 1 proposals.

Proposal to introduce a new temperature correction formula for the rolling sound emissions of tyres of classes C1 and C2, to remove the content of the now obsolete Annex 4 as well as all its references, to update references to standards, and to make editorial improvements for clarity and consistency across tyre regulations.