Session 76 | Hybrid Geneva | 14-16 Sep
1. Adoption of the agenda

In accordance with Chapter III, Rule 7 of the Rules of Procedure (ECE/TRANS/WP.29/690/Rev.2) of the World Forum for Harmonization of Vehicle Regulations (WP.29), the first item on the provisional agenda is its adoption.

GRBP/2022/10 | GRBP: Annotated provisional agenda for the 76th (September 2022) session
GRBP/2022/10 | GRBP: Annotated provisional agenda for the 76th (September 2022) session
2. UN Regulation No. 51 (Noise of M and N categories of vehicles)

GRBP will be informed about the activities of the Informal Working Group on Measurement Uncertainties (IWG MU) and will consider a proposal that was prepared by IWG MU with the aim to reduce variability.

GRBP will recall the IWG MU general approach how to handle measurement uncertainties in UN Regulations and will be informed about WP.29 considerations at its June 2022 session on this matter.

GRBP will address a proposal prepared by the experts from the International Organization for Standardization (ISO) that brings the latest ISO 10844 standard test surface into the UN Regulation.

3. UN Regulation No. 138 (Quiet road-transport vehicles)

GRBP will address a proposal prepared by the experts from ISO that brings the latest ISO 10844 standard test surface into the UN Regulation.

GRBP may expect a progress report of the Informal Working Group on Quiet Road Transport Vehicles for the Global Technical Regulation (IWG QRTV GTR).

GRBP will also be informed about the activities of the newly created Task Force on Quiet Road Transport Vehicles (TF QRTV).

4. Tyres
4. (a) UN Regulation No. 30 (Tyres for passenger cars and their trailers)

Based on a new proposal by the expert from the European Tyre and Rim Technical Organisation (ETRTO), GRBP will continue consideration of a new definition for “radial tyre”. The ETRTO proposal also addresses other issues, such as the definition of snow tyres, requirements for special use tyres of class C1, addition of an optional prefix for extra load tyres, a clarification on the description of the load/speed test for run flat/extended mobility tyres and editorial corrections.

4. (b) UN Regulation No. 109 (Retreaded tyres for commercial vehicles and their trailers)

At the previous session, the experts from France, the Netherlands and the Bureau International Permanent des Associations de Vendeurs et Rechapeurs de Pneumatiques (BIPAVER) proposed a new scheme of approval for retreaded snow tyres for use in severe snow conditions in accordance with UN Regulation No. 109 (GRBP-75-14). Experts were invited to provide comments to the authors (ECE/TRANS/WP.29/GRBP/73, para. 34). GRBP will receive an update on this matter.

GRBP-75-14 | UN R109: Proposal for amendments to the 01 series of amendments Propose a new scheme of approval for Retreaded snow tyres for use in severe snow conditions
4. (c) UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)

GRBP is invited to consider a proposal for the 04 series of amendments to UN Regulation No. 117 submitted by the experts from the European Commission.

GRBP will address a proposal prepared by the experts from ISO that brings the latest ISO 10844 standard test surface into the UN Regulation.

GRBP will be briefed on the activities of the IWG on Wet Grip Performance of Tyres in Worn State (IWG WGWT) and will consider their proposals for the moulded standard reference test tyre and wet grip of C2, C3, and some clusters of C1 tyres in worn state.

GRBP/2022/22 | UN R117: Proposal for a Supplement to the 03 series of amendments Proposal from the Worn Tyres working group to improve precision of the test procedures for measuring the wet adhesion of tyres in a worn state by using a moulded SRTT16 reference tyre (instead of a buffed tyre), to introduce new transitional provisions related to this change, to extend corrections already made to thee 02 series to the 03 series and make additional editorial corrections, and to define the range for tyre inflation vis-à-vis rim size to reduce uncertainties in measuring tread depth.
GRBP/2022/23 | UN R117: Proposal for a 04 series of amendments Proposal from the Worn Tyres working group to set the wet grip index threshold at 0.80 for class C1 tyres with a nominal aspect ratio equal to or less than 40, a section width equal to or higher than 235 mm and suitable for speeds equal to or greater than 300 km/h and for class C1 all terrain and special use tyres (see GRBP-75-27, slide 6). The proposal also introduces the k<sub>worn</sub> factor in a new para. 3 in Annex 9 to address wet grip of C2 and C3 tyres in a worn state (see GRBP-75-26-Rev.1 for concept).

GRBP will consider an amendment proposal concerning a “traction tyre” tabled by the expert from ETRTO.

GRBP is invited to address proposals submitted by the experts from ETRTO which aim to introduce provisions for type approval of special use tyres that fulfil the requirements for snow performance.

GRBP may also wish to consider corrections of editorial errors proposed by the expert from ETRTO.

At its previous session, GRBP noted that the experts from France continued consultations on monitoring the machine deviation for rolling resistance measurements (ECE/TRANS/WP.29/GRBP/73, paragraph 24 and GRBP-74-04). GRBP may wish to be informed on the outcome of this activity.

GRBP-74-04 | UN R117: Proposal for amendments to the 02 series of amendments Proposal to add requirement on the monitoring of the machine deviation for rolling resistance measurement.
GRBP/2022/22 | UN R117: Proposal for a Supplement to the 03 series of amendments Proposal from the Worn Tyres working group to improve precision of the test procedures for measuring the wet adhesion of tyres in a worn state by using a moulded SRTT16 reference tyre (instead of a buffed tyre), to introduce new transitional provisions related to this change, to extend corrections already made to thee 02 series to the 03 series and make additional editorial corrections, and to define the range for tyre inflation vis-à-vis rim size to reduce uncertainties in measuring tread depth.
GRBP/2022/23 | UN R117: Proposal for a 04 series of amendments Proposal from the Worn Tyres working group to set the wet grip index threshold at 0.80 for class C1 tyres with a nominal aspect ratio equal to or less than 40, a section width equal to or higher than 235 mm and suitable for speeds equal to or greater than 300 km/h and for class C1 all terrain and special use tyres (see GRBP-75-27, slide 6). The proposal also introduces the k<sub>worn</sub> factor in a new para. 3 in Annex 9 to address wet grip of C2 and C3 tyres in a worn state (see GRBP-75-26-Rev.1 for concept).
4. (d) UN Regulation No. [164] (Studded tyres)

GRBP will be briefed on the activities of the Task Force on Studded Tyres (TF ST) and will consider a proposal prepared by TF ST that includes prescriptions for ice grip performance of tyres of class C1 into UN Regulation No. 164.

GRBP/2022/11 | UN R164: Proposal for Supplement 1 Proposal from the Studded Tyres task force to introduce provisions for C1 tyre ice-grip performance.
GRBP/2022/11 | UN R164: Proposal for Supplement 1 Proposal from the Studded Tyres task force to introduce provisions for C1 tyre ice-grip performance.
5. Draft UN Regulation on reverse warning sound

GRBP will be informed about the WP.29 considerations, at its June 2022 session, of the draft new UN Regulation on reverse warning sound.

WP.29/2022/88 | Proposal for a new UN Regulation on Reverse Warning systems Proposal from GRBP for a new UN Regulation concerning the type approval of audible reverse warning devices and of motor vehicles with regard to their audible reverse warning signals.
6. Exchange of information on national and international requirements on noise levels

GRBP will continue the exchange of views on developing national or regional legislation and international requirements on noise levels.

7. Proposals for amendments to the Consolidated Resolution on the Construction of Vehicles

GRBP will consider draft amendments, if any, to the Consolidated Resolution on the Construction of Vehicles (R.E.3).

8. Development of the International Whole Vehicle Type Approval system

GRBP will be informed about progress in implementing the International Whole Vehicle Type Approval (IWVTA) (UN Regulation No. 0).

9. Highlights of the recent sessions of the World Forum for Harmonization of Vehicle Regulations

GRBP will be briefed by the secretariat about the highlights of the recent sessions of WP.29 on GRBP and common issues.

10. Exchange of views on the future work of the Working Party on Noise and Tyres

GRBP may wish to review the list of priorities for the future work.

11. Other business

At its previous session, GRBP took note of a proposal for extension of the Electronic Database for the Exchange of Type Approval Documentation (DETA), with the aim to improve the use of the “Unique Identifier” (UI) in UN Regulations (GRBP-74-18) and decided to come back to the issue at this session.

GRBP will consider any other subjects, as appropriate.

GRBP-74-18 | (DETA): Proposal to improve the use of the Unique Identifier (UI)
12. Provisional agenda for the next session

GRBP is invited to provide guidance on the provisional agenda for the next session provisionally scheduled to be held in Geneva from 7 to 10 February 2023.

13. Election of officers

In compliance with Rule 37 of the WP.29 Rules of Procedure (ECE/TRANS/WP.29/690/Rev.2), GRBP will elect a Chair and a Vice-Chair for the sessions scheduled for the year 2023. According to the Rules of Procedure of the Inland Transport Committee, countries are invited to submit their nominations to the secretariat not later than on 26 August 2022.