previous meeting next meeting
Working Party on Noise and Tyres | Session 77 | 7-10 Feb
Geneva

Scheduled in Geneva from 7 (p.m.) to 10 (a.m.) February 2023. The deadline for the submission of official documents to the secretariat is 14 November 2022, twelve weeks prior to the session.

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-77-06 | GRBP-77: Running order of the agenda
GRBP/2023/1 | GRBP: Annotated provisional agenda for the 77th (February 2023) session
GRBP/2023/1 | GRBP: Annotated provisional agenda for the 77th (February 2023) session
GRBP-77-06 | GRBP-77: Running order of the agenda
2. UN Regulation No. 41 (Noise emissions of motorcycles)

GRBP is invited to consider a proposal prepared by the expert from the International Motorcycle Manufacturers Association (IMMA) with the aim to complete the additional sound emission provisions’ table in the communication form of the 05 series of amendments to UN Regulation No. 41.

GRBP/2023/6 | UN R41: Proposal for Supplement 2 to the 05 series of amendments 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.
GRBP/2023/6 | UN R41: Proposal for Supplement 2 to the 05 series of amendments 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.
GRBP-77-02 | UN R41and R63: Proposal for amendments <ol><li>Proposal to amend the 04 and 05 series of UN R41 and the 02 series of UN R63 to allow use of the latest state of the art ISO 10844 test track.</li><li>ISO has updated the ISO 10844 standard to reduce track-to-track variability caused by differing interpretations and implementations of the technical requirements. The tyre/road contribution to the overall sound performance of a motorcycle is lower compared to cars.</li><li>The improvements from the ISO 10844:2014 to the 2021 version would not result in a need for updating the surface for L-category test tracks: Updating the ISO 10844 reference would have negligible impact on the measurement procedure and measurement results.</li><li>If however the ISO reference in the L-category noise regulations would be updated without maintaining the current ISO 10844:2014 as an option, IMMA sees a potential risk of tracks needing recertification, creating administrative burden with no practical benefit.</li><li> If later on, the tracks would need re-surfacing anyway (e.g. due to wear), then these can be built and certified according to ISO10844:2021. Because of the above, IMMA would like to allow certification with the tracks complying to either ISO10844:2014 or ISO10844:2021.</li><li>This proposal takes the opportunity to introduce proposals for additional corrections in R41/04 and R41/05 as specified below:<ul><li>Supplement 9 to the 04 series of amendments to UN Regulation 41 introduced a new paragraph 12.4, needing to renumber the (former) paragraphs 12.4 to 12.9 (WP.29/2021/4). Due to this renumbering, the reference to paragraph 12.7 in Annex 6 footnote a, and Annex 7 paragraph 2.6 is no longer correct and should be replaced by a reference to paragraph 12.8.</li><li>With the introduction of the 05 series of amendments the Transitional Provisions were rewritten and footnote a of Annex 6 became obsolete.</li></ul></li></ol>
3. UN Regulation No. 51 (Noise of M and N categories of vehicles)

GRBP will be informed about editorial corrections and clarifications to Supplement 7 to the 03 series of amendments to UN Regulation No. 51 that were prepared by the experts from the Informal Working Groups on Measurement Uncertainties (IWG MU) and on Additional Sound Emission Provisions (ASEP), as well as from the International Organization for Standardization (ISO).

GRBP/2023/12 | UN R51: Proposal for corrections to the 03 series of amendments Proposal from the Informal Working Groups on Measurement Uncertainties (IWG MU) and Additional Sound Emission Provisions (ASEP) and from the International Organization for Standardization (ISO) for editorial corrections and clarifications based on the 03 series of amendments to UN R51 up to Supplement 7.

At the previous session, the expert from the International Organization of Motor Vehicle Manufacturers (OICA) raised a number of practical questions on collecting and analysing test data for the Real Driving Additional Sound Emission Provisions (RD ASEP). GRBP invited contracting parties applying UN Regulation No. 51 to prepare proposals on this issue and agreed to revert to it at this session.

GRBP will also receive a progress report of IWG MU.

GRBP/2023/12 | UN R51: Proposal for corrections to the 03 series of amendments Proposal from the Informal Working Groups on Measurement Uncertainties (IWG MU) and Additional Sound Emission Provisions (ASEP) and from the International Organization for Standardization (ISO) for editorial corrections and clarifications based on the 03 series of amendments to UN R51 up to Supplement 7.
GRBP-76-10 | Questions on documents GRBP/2022/4 and GRBP-75-37 (Monitoring phase of RD-ASEP from 1 July 2023)
GRBP-77-05 | UN R51: Consolidated version of Supplement 8 to the 03 series of amendments 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.
4. UN Regulation No. 138 (Quiet road transport vehicles)

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 Task Force on Quiet Road Transport Vehicles (TF QRTV).

5. Tyres
5. (a) UN Regulation No. 54 (Tyres for commercial vehicles and their trailers)

GRBP is invited to address a set of amendment proposals submitted by the experts from the European Tyre and Rim Technical Organisation (ETRTO).

GRBP/2023/11 | UN R54: Proposal for amendments Proposal to address the following: 1. “Special use” tyres with nominal rim diameters larger than those listed in the present table (rim diameters up to 42, section widths up to 750 mm and overall diameters over 2 meters) and with speed symbols F and above have been announced in the European market as original equipment of N3G "special purpose vehicles" (i.e., special high speed self-propelled vehicles for agricultural and forestry use, like wood choppers). 2. Existing multi-purpose tyres (MPT) (classified as “special use tyres” as per paragraphs 2.5.3. and 3.1.13.), already type approved since years, have a tread pattern with lugs or cleats in addition to those with blocks, as evidenced by the attached slide showing some examples. It is proposed to amend paragraph 6.3.1. by clarifying that lugs and cleats are possible shapes of the mentioned blocks. 3. Testing tyres with very large overall diameters, sometimes over 2 m, on a test drum with a diameter of 1.70 m ± 1 % would be unpracticable. For practical reasons most of those tyres are regularly tested on drums with a diameter of 3 m or even larger. The proposal carries equivalence provisions from UN R106 to justify the equivalence of the test method as required by Annex 7 in point 4 “Equivalent test methods" and clarifies based on UN R117 the formula already used indirectly. 4. Some commercial vehicles are often used in the market at a reduced speed of 70 km/h with a load-capacity of the tyres increased as per load/speed combination defined in the table of Annex 8. The proposal would allow use of the speed category symbol E (but restrict it to "additional service description") to provide this information. 5. Considering that 32 km/h is already a floor value for the test-drum speed for diagonal tyres, ETRTO proposes not to apply to E speed category symbol tyres the linear decrease of the test-drum speed in function of the decrease of the speed category symbol by keeping, for safety reasons, the same test-drum speed as for F speed category symbol tyres, i.e., 32 km/h). 6. In the case of additional service descriptions mentioned in paragraph 6.2.5.1., it is proposed not to perform the additional load/speed test because the load-capacity approximates with a negligeable difference the reduction or the increase in percentage of the nominal load/speed combination applicable to the nominal speed category symbol (see Annex 8). 7. Type approval applications for radial tyres with load capacity index greater or equal to 122 and without the additional marking "LT", or "C" have been done in the past for the speed category symbol N for which the load/speed endurance test procedure is not described in Annex 7, Appendix 1. To type approve such tyres the test speed was separately defined by the different involved Type Approval Authorities. In order to harmonize the test procedure to be used for the type approval of such tyres, it is proposed to amend the Annex 7, Appendix 1 by introducing testing conditions in line with the rule applied for defining the test speed of radial tyres with load capacity index greater or equal to 122 (i.e. starting from 32 km/h set for F speed category symbol, the test speed is increased by 8 km/h respect to the one set for the previous speed category symbol). 8. The definition of "snow tyre" is amended to clarify that "snow tyres" are not only suitable for the use in snow conditions but also on mud and by replacing the term "maintain vehicle motion" (i.e. keeping the vehicle speed and direction of movement constant) by a more general concept of "controlling vehicle motion" (i.e. also being able to change the vehicle speed and direction of movement as intended). 9. It is proposed to explicitly allow other technical measurement solutions of the tyre overall width by removing the words “by caliper” which fix a technical limitation. The removal of this technical limitation would be advisable following the principle of not stopping the technical innovations. 10. Editorial corrections are introduced to ensure that the terms "load-capacity" and "speed category symbol" are used consistently throughout the text and to remove some typing mistakes present in the current text.
GRBP/2023/11 | UN R54: Proposal for amendments Proposal to address the following: 1. “Special use” tyres with nominal rim diameters larger than those listed in the present table (rim diameters up to 42, section widths up to 750 mm and overall diameters over 2 meters) and with speed symbols F and above have been announced in the European market as original equipment of N3G "special purpose vehicles" (i.e., special high speed self-propelled vehicles for agricultural and forestry use, like wood choppers). 2. Existing multi-purpose tyres (MPT) (classified as “special use tyres” as per paragraphs 2.5.3. and 3.1.13.), already type approved since years, have a tread pattern with lugs or cleats in addition to those with blocks, as evidenced by the attached slide showing some examples. It is proposed to amend paragraph 6.3.1. by clarifying that lugs and cleats are possible shapes of the mentioned blocks. 3. Testing tyres with very large overall diameters, sometimes over 2 m, on a test drum with a diameter of 1.70 m ± 1 % would be unpracticable. For practical reasons most of those tyres are regularly tested on drums with a diameter of 3 m or even larger. The proposal carries equivalence provisions from UN R106 to justify the equivalence of the test method as required by Annex 7 in point 4 “Equivalent test methods" and clarifies based on UN R117 the formula already used indirectly. 4. Some commercial vehicles are often used in the market at a reduced speed of 70 km/h with a load-capacity of the tyres increased as per load/speed combination defined in the table of Annex 8. The proposal would allow use of the speed category symbol E (but restrict it to "additional service description") to provide this information. 5. Considering that 32 km/h is already a floor value for the test-drum speed for diagonal tyres, ETRTO proposes not to apply to E speed category symbol tyres the linear decrease of the test-drum speed in function of the decrease of the speed category symbol by keeping, for safety reasons, the same test-drum speed as for F speed category symbol tyres, i.e., 32 km/h). 6. In the case of additional service descriptions mentioned in paragraph 6.2.5.1., it is proposed not to perform the additional load/speed test because the load-capacity approximates with a negligeable difference the reduction or the increase in percentage of the nominal load/speed combination applicable to the nominal speed category symbol (see Annex 8). 7. Type approval applications for radial tyres with load capacity index greater or equal to 122 and without the additional marking "LT", or "C" have been done in the past for the speed category symbol N for which the load/speed endurance test procedure is not described in Annex 7, Appendix 1. To type approve such tyres the test speed was separately defined by the different involved Type Approval Authorities. In order to harmonize the test procedure to be used for the type approval of such tyres, it is proposed to amend the Annex 7, Appendix 1 by introducing testing conditions in line with the rule applied for defining the test speed of radial tyres with load capacity index greater or equal to 122 (i.e. starting from 32 km/h set for F speed category symbol, the test speed is increased by 8 km/h respect to the one set for the previous speed category symbol). 8. The definition of "snow tyre" is amended to clarify that "snow tyres" are not only suitable for the use in snow conditions but also on mud and by replacing the term "maintain vehicle motion" (i.e. keeping the vehicle speed and direction of movement constant) by a more general concept of "controlling vehicle motion" (i.e. also being able to change the vehicle speed and direction of movement as intended). 9. It is proposed to explicitly allow other technical measurement solutions of the tyre overall width by removing the words “by caliper” which fix a technical limitation. The removal of this technical limitation would be advisable following the principle of not stopping the technical innovations. 10. Editorial corrections are introduced to ensure that the terms "load-capacity" and "speed category symbol" are used consistently throughout the text and to remove some typing mistakes present in the current text.
5. (b) UN Regulation No. 75 (Tyres for L-category vehicles)

GRBP will consider corrections and clarifications proposed by the expert from ETRTO.

5. (c) UN Regulation No. 106 (Tyres for agricultural vehicles and their trailers)

GRBP will address a set of amendment proposals submitted by the expert from ETRTO.

GRBP/2023/9 | UN R106: Proposal for amendments Proposal to extend the scope of the speed category E to align with the technical evolution of agricultural and forestry vehicles.
GRBP/2023/9 | UN R106: Proposal for amendments Proposal to extend the scope of the speed category E to align with the technical evolution of agricultural and forestry vehicles.
5. (d) UN Regulation No. 109 (Retreaded tyres for commercial vehicles and their trailers)

GRBP is invited to address a proposal submitted by the expert from France that aligns the test procedures in UN Regulation No. 109 with those in UN Regulation No. 117.

GRBP/2023/4 | UN R109: Proposal for amendments Proposal to ensure that the test procedures for retreaded tyres are aligned with the text adopted by WP.29 per document WP.29/2021/8 for UN R117.

GRBP will consider a correction submitted by the expert from ETRTO.

GRBP/2023/10 | UN R109: Proposal for amendments The prescription given in paragraph 3.5.2., which will be implemented through document WP.29/2022/7/Rev.1 adopted by WP.29, contradicts the previously existing prescription in paragraph 3.2.9. This proposal aims to resolve the contradiction by amending paragraph 3.5.2. to introduce a reference to the prescriptions given in paragraph 3.2.9.
GRBP/2023/4 | UN R109: Proposal for amendments Proposal to ensure that the test procedures for retreaded tyres are aligned with the text adopted by WP.29 per document WP.29/2021/8 for UN R117.
GRBP/2023/10 | UN R109: Proposal for amendments The prescription given in paragraph 3.5.2., which will be implemented through document WP.29/2022/7/Rev.1 adopted by WP.29, contradicts the previously existing prescription in paragraph 3.2.9. This proposal aims to resolve the contradiction by amending paragraph 3.5.2. to introduce a reference to the prescriptions given in paragraph 3.2.9.
5. (e) UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)

GRBP will be briefed on the activities of the IWG on Wet Grip Performance of Tyres in Worn State (IWG WGWT) and will consider amendment proposals by IWG WGWT that introduce a detailed reference for the molded standard reference test tyre (SRTT16).

GRBP-77-03 | Worn tyres: Revised Terms of Reference of the Informal Working Group on Wet Grip Performance for Tyres in a Worn State
GRBP/2023/2 | UN R117: Proposal for amendments to Supplement 1 to the 03 series of amendments Proposal for the Worn Tyres working group to complete the proposal for Supplement 1 to the 03 series of amendments to UN R117 (adopted by GRBP in September 2022 and submitted to the March 2023 WP.29 session) by adding a detailed reference (F3611-22) for the molded standard reference test tyre (SRTT16).

GRBP will address a proposal for a new transitional provision which was submitted by the experts from the European Commission.

GRBP/2023/5 | UN R117: Proposal for amendments The existing transitional provisions do not address tyres produced in accordance with the applicable requirements and placed in distribution channels before 7 July 2026. Therefore, a new transitional provision is proposed based on the clause R.4 of part C – “Transitional provisions for replacement parts for vehicles in use” of the General Guidelines for United Nations Regulatory Procedures and Transitional Provisions in UN Regulations. It will clarify that new tyres manufactured before 7 July 2026 and approved according to the 02 or 03 series of amendment will be allowed to be sold and fitted on vehicles in use for additional period not exceeding 30 months from 7 July 2026.

GRBP will consider corrections proposed by the expert from ETRTO.

GRBP/2023/8 | UN R117: Proposal for amendments Proposal to delete obsolete footnotes concerning worn tyre wet grip and approvals under UN R117 coincident with approvals under UN R54. The 04 series of amendments to UN R117 introduces the requirements on adhesion of tyres in worn state on wet surfaces for tyres within the scope of UN R54.

At the previous session, GRBP adopted a package of amendment proposals to the 02, 03 and 04 series of amendments of UN Regulation No. 117 and agreed to check the consolidated documents for errors at this session (ECE/TRANS/WP.29/GRBP/74, paragraph 30). These documents will be prepared in December 2022 for submission to the March 2023 session of WP.29. Their numbers will be indicated in an updated provisional agenda to be issued at a later stage.

GRBP will consider amendment proposals, if any, to other UN Regulations on tyres.

GRBP/2023/2 | UN R117: Proposal for amendments to Supplement 1 to the 03 series of amendments Proposal for the Worn Tyres working group to complete the proposal for Supplement 1 to the 03 series of amendments to UN R117 (adopted by GRBP in September 2022 and submitted to the March 2023 WP.29 session) by adding a detailed reference (F3611-22) for the molded standard reference test tyre (SRTT16).
GRBP/2023/5 | UN R117: Proposal for amendments The existing transitional provisions do not address tyres produced in accordance with the applicable requirements and placed in distribution channels before 7 July 2026. Therefore, a new transitional provision is proposed based on the clause R.4 of part C – “Transitional provisions for replacement parts for vehicles in use” of the General Guidelines for United Nations Regulatory Procedures and Transitional Provisions in UN Regulations. It will clarify that new tyres manufactured before 7 July 2026 and approved according to the 02 or 03 series of amendment will be allowed to be sold and fitted on vehicles in use for additional period not exceeding 30 months from 7 July 2026.
GRBP/2023/8 | UN R117: Proposal for amendments Proposal to delete obsolete footnotes concerning worn tyre wet grip and approvals under UN R117 coincident with approvals under UN R54. The 04 series of amendments to UN R117 introduces the requirements on adhesion of tyres in worn state on wet surfaces for tyres within the scope of UN R54.
GRBP-77-03 | Worn tyres: Revised Terms of Reference of the Informal Working Group on Wet Grip Performance for Tyres in a Worn State
6. UN Regulation No. [165] (Reverse warning)

At the previous session, the expert from the United Kingdom proposed to extend the installation of a pause function to situations where national time-based restrictions apply, irrespective of a rear visibility device being fitted. In view of several comments, GRBP invited the expert from the United Kingdom to prepare a revised proposal for consideration at this session.

GRBP/2022/24 | UN R165: Proposal for Supplement 1 Proposal to amend the provisions for a pause function for reversing warning systems with the aim to comply with the national environmental (noise) restrictions.
GRBP-76-07/Rev.1 | Reverse Warning Regulation – UK Proposal
7. 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.

8. 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).

9. Development of the International Whole Vehicle Type Approval system

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

10. 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.

GRBP-77-04 | General information and WP.29 highlights relevant to GRBP activities
GRBP-77-04 | General information and WP.29 highlights relevant to GRBP activities
11. 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.

12. Other business

GRBP will be informed about the activities of the Informal Working Group for the Electronic Database for the Exchange of Type Approval Documentation (IWG DETA) with the aim to start the use of the “Unique Identifier” (UI) in UN Regulations.

At the previous session, the Chair invited volunteers to review the UN Regulations under the responsibility of GRBP with the aim to identify amendments to driver-related functions, which might be necessary for applying these UN Regulations in the context of automated/autonomous vehicles (ECE/TRANS/WP.29/GRBP/74, paragraph 40). GRBP may wish to revert to this matter.

GRBP may expect a progress report of the Task Force on Tyre Abrasion (TF TA).

GRBP will consider any other subjects, as appropriate.

WP.29-188-20 | 1958 Agreement: Unique Identifier - Proposed actions for the DETA informal group, GR working parties, and WP.29 Note from the WP.29 secretariat
13. 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 30 August to 1 September 2023.