Proposal to specify the working principles of an Acoustic Vehicle Alerting System (AVAS) and to reduce measurement uncertainties during the measurement of the one third octave bands.

Proposal from the ad hoc working group on retreaded tyres to move provisions for snow grip performance of retreaded tyres and their classification as traction tyres from R109 into a new UN Regulation on type approval of retreaded tyres of classes C1, C2 and C3 with respect to their snow grip performance and/or classification as traction tyre.

Proposal to reduce noise measurement variability, completing the amendment proposal adopted at the seventy-eighth session of the Working Party on Noise and Tyres (informal document GRBP-78-05 replacing ECE/TRANS/WP.29/GRBP/2023/19).

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.

Proposal to complete the amendment proposal adopted at the 78th GRBP session (informal document GRBP-78-05 replacing ECE/TRANS/WP.29/GRBP/2023/19).

Proposal to improve the reproducibility of the snow grip test method by replacing the current reference tyres C3 SRTTs 19.5 and 22.5 with the new reference tyres C3 SRTTs 19.5 and 22.5 siped.

Proposal from the Measurement Uncertainties informal group for a Document for Reference providing a general approach on how to handle measurement uncertainties in UN Regulations (initially addressing UN Regulations Nos. 51 and 117).

Proposal to improve the reproducibility of the snow grip test method by replacing the current reference tyres C3 SRTTs 19.5 and 22.5 with the new reference tyres C3 SRTTs 19.5 and 22.5 siped.

Proposal from Task Force on Tyre Abrasion (TFTA) to introduce test methods to measure tyre abrasion.

Proposal from the ad hoc working group on retreaded tyres to move provisions for snow grip performance of retreaded tyres and their classification as traction tyres from UN R108 and R109 into a new UN Regulation on type approval of retreaded tyres of classes C1, C2 and C3 with respect to their snow grip performance and/or classification as traction tyre.

Proposal for editorial improvements and updates to ISO and ASTM standards references and to align with Supplement 2 to the 04 series of amendments, including a new temperature correction formula for the rolling sound emissions of tyres of classes C1 and C2 and to remove the content of the now obsolete Annex 4 as well as all its references.

Proposal from the ad hoc working group on retreaded tyres to move provisions for snow grip performance of retreaded tyres and their classification as traction tyres from UN R108 into a new UN Regulation on type approval of retreaded tyres of classes C1, C2 and C3 with respect to their snow grip performance and/or classification as traction tyre.

Proposal to align Annex 9 with Annex 1 (paragraphs 5., 6. and 7.) and to enable type approval authorities to make the connection with the relevant reports.

Proposal for editorial corrections.

Proposal to clarify the text:

• Term “construction materials”
• interpretation of paras. 2.2.4. and 2.2.8.
• supplement technical description of the wheel with information describing production quality control
• option for additional consumer-oriented marking
• clarify Annex 4 and exclude aluminum-alloy and magnesium-alloy wheels under test (b)
• clarify Annex 6 with regard to possible defects caused by the production process and not affecting the appearance of cracks during testing
• recommend under Annex 6 to identify cracks occurred as a result of the test by using penetrating paints
• clarify Annexes 7 and 8 with regard to air leakage.

Proposal to allow the use of LT-marked tyres under certain conditions and weight limits with a rolling resistance greater than the current limits.

Amendments from the Task Force on Tyre Abrasion (TFTA) to the proposal to introduce test methods to measure tyre abrasion.

Replace the proposal for Supplement 3 of the 05 Series of amendments

Proposal to replace the Supplement 11 of the 04 Series of amendments

Proposal to replace proposal for Supplement 6 of the 02 Series of amendments

Proposal to replace document ECE/TRANS/WP.29/GRBP/2024/06

Proposal to replace document ECE/TRANS/WP.29/GRBP/2024/09

Proposal to replace document ECE/TRANS/WP.29/GRBP/2024/07

Proposal to replace document ECE/TRANS/WP.29/GRBP/2024/13

Consolidated version including the amendments proposed with document ECE/TRANS/WP.29/GRBP/2024/13 amended by GRBP-79-24.

Proposal to replace document ECE/TRANS/WP.29/GRBP/2024/03

Consolidated version including the amendments proposed with document ECE/TRANS/WP.29/GRBP/2024/03 amended by GRBP-79-26..

This consolidated document amends and supersedes GRBP/2024/11.

Consolidated version including the amendments proposed with document ECE/TRANS/WP.29/GRBP/2024/11 amended by GRBP-79-28-Rev.1.

This document supersedes the proposal in ECE/TRANS/WP.29/GRBP/2024/16

Some corrections and clarifications concerning power definition, calibration, temperature correction and Reference sound assessment

Updated proposal for a 02 series of amendments to specify the working principles of an Acoustic Vehicle Alerting System (AVAS) and to reduce measurement uncertainties during the measurement of the one third octave bands.

In introducing ASEP in Annex 7 in 2016, the scope was limited to vehicles with internal combustion engines (ICE) based on the experience of variabilities in the exhaust silencing systems. Electric driven vehicles have been exempted from ASEP. For electric driven vehicles the new UN Regulation No. 138, dealing with the reduced audibility of these vehicles, was worked out until 2017. At that moment no one expected sound enhancement systems beyond the scope and aim of UN R138.

This proposal is an approach to address the concern that electric vehicles might be equipped with sound enhancement systems beyond the scope and aim of UN R138. This proposal does not require any changes to UN R138.01. This proposal is given as a supplement to enable the quickest entry into force, providing all manufacturers clear direction on the design of sound enhancement systems.