2. GRBP considered and adopted the agenda (ECE/TRANS/WP.29/GRBP/2022/10, as amended by GRBP-76-01). GRBP noted the running order proposed by the Chair (GRBP-76-20 and GRBP-76-28-Rev.1). The informal documents are listed in annex I of the session report. The GRBP informal groups are listed in annex III.

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

20. The expert of IWG WGWT presented their proposals for the moulded standard reference test tyre and wet grip of C2, C3, and some clusters of C1 tyres in a worn state (ECE/TRANS/WP.29/GRBP/2022/22, ECE/TRANS/WP.29/GRBP/2022/23, GRBP-76-02 and GRBP-76-05). The expert from ETRTO introduced additional amendments (GRBP-76-24-Rev.1, GRBP-76-33-Rev.1 and GRBP-76-34).

21. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/22, as amended by GRBP-76-05 and GRBP-76-34, subject to the removal of the square brackets, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 1 to the 03 series of amendments to UN Regulation No. 117.

22. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/23, as amended by GRBP-76-02, GRBP-76-33-Rev.1, and GRBP-76-24-Rev.1, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of the draft new 04 series of amendments to UN Regulation No. 117.

189th WP.29 session (6-9 Mar)

UN R109 CV Retreaded Tires

73rd GRBP session (26-29 Jan 2021)

14. The expert from France proposed to update and revise the text of UN Regulation No. 109 (GRBP-73-21). The experts from the Netherlands and BIPAVER commented on the proposal. GRBP invited the experts from France, Netherlands and BIPAVER to cooperate with the aim to prepare a working document for the next session.

74th GRBP session (15-17 Sep 2021)

18. The experts from France, the Netherlands and BIPAVER proposed to align the provisions for retreaded tyres with the previously adopted proposals for UN Regulations Nos. 54 and 117 and to cover all tread materials (ECE/TRANS/WP.29/GRBP/2021/16). The expert from ETRTO commented on the proposal and suggested further modifications (GRBP-74-29-Rev.1 and GRBP-74-30-Rev.2). GRBP adopted the proposal with the amendments in Annex IV and requested the secretariat to submit it for consideration and vote at the March 2022 sessions of WP.29 and AC.1 as draft Supplement 11 to UN Regulation No. 109.

75th GRBP session (8-11 Feb 2022)

34. The experts from BIPAVER, France and the Netherlands 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). GRBP invited experts to provide comments to the authors, with a view to preparing an official document for the next session.

UN R30 Pneumatic Tires

13. Based on a study (GRBP-76-04), the expert from ETRTO proposed a new definition for “radial tyre” (ECE/TRANS/WP.29/GRBP/2022/21). The proposal also addressed 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.

14. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/21 and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 25 to the 02 series of amendments to UN Regulation No. 30.

72nd GRBP session (7-9 Sep 2020)

11. The expert from France proposed a new definition of “radial tyre” (ECE/TRANS/WP.29/GRBP/2020/21 and GRBP-72-22), which was amended by the expert from EC (GRBP-72-24). The expert from Japan held the view that the proposal was not sufficiently clear. The expert of ETRTO pointed out that his organization would need technical justification to support the proposal. The Chair invited all experts concerned to internally re-discuss the proposal and to submit an updated document to the next session.

74th GRBP session (15-17 Sep 2021)

15. The experts from France and EC introduced an updated proposal for the new definition of “radial tyre” (ECE/TRANS/WP.29/GRBP/2021/9). The same definition was also proposed for UN Regulations Nos. 54, 75, 106, 108 and 109 ECE/TRANS/WP.29/GRBP/2021/10. The experts from Canada and the United States of America raised a number of questions on the proposal (GRBP-74-07) and pointed out that they had started consultations with the authors. GRBP invited the stakeholders, in liaison with ETRTO, to continue discussions and agreed to come back to the proposal at the next session.

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

20. The expert of IWG WGWT presented their proposals for the moulded standard reference test tyre and wet grip of C2, C3, and some clusters of C1 tyres in a worn state (ECE/TRANS/WP.29/GRBP/2022/22, ECE/TRANS/WP.29/GRBP/2022/23, GRBP-76-02 and GRBP-76-05). The expert from ETRTO introduced additional amendments (GRBP-76-24-Rev.1, GRBP-76-33-Rev.1 and GRBP-76-34).

21. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/22, as amended by GRBP-76-05 and GRBP-76-34, subject to the removal of the square brackets, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 1 to the 03 series of amendments to UN Regulation No. 117.

22. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/23, as amended by GRBP-76-02, GRBP-76-33-Rev.1, and GRBP-76-24-Rev.1, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of the draft new 04 series of amendments to UN Regulation No. 117.

189th WP.29 session (6-9 Mar)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

19. GRBP noted the activities of the Informal Working Group on Wet Grip Performance of Tyres in Worn State (IWG WGWT) (GRBP-76-06).

UN R165 Reversing Warning

32. 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 (ECE/TRANS/WP.29/GRBP/2022/24 and GRBP-76-07-Rev.1). The experts from France, Germany, Japan, Russian Federation and OICA commented on the proposal. GRBP invited the expert from the United Kingdom to liaise with these experts with the aim to prepare a revised proposal for consideration at the next session.

32. 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 (ECE/TRANS/WP.29/GRBP/2022/24 and GRBP-76-07-Rev.1). The experts from France, Germany, Japan, Russian Federation and OICA commented on the proposal. GRBP invited the expert from the United Kingdom to liaise with these experts with the aim to prepare a revised proposal for consideration at the next session.

UN R51 Vehicle Noise

3. GRBP noted the activities of the Informal Working Group on Measurement Uncertainties (IWG MU) (GRBP-76-08) and considered their proposal that aimed to reduce variability (ECE/TRANS/WP.29/GRBP/2022/16 and GRBP-76-09). GRBP adopted the proposal, as amended by GRBP-76-09, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and the Administrative Committee of the 1958 Agreement (AC.1) as draft Supplement 8 to the 03 series of amendments to UN Regulation No. 51.

UN R51 Vehicle Noise

3. GRBP noted the activities of the Informal Working Group on Measurement Uncertainties (IWG MU) (GRBP-76-08) and considered their proposal that aimed to reduce variability (ECE/TRANS/WP.29/GRBP/2022/16 and GRBP-76-09). GRBP adopted the proposal, as amended by GRBP-76-09, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and the Administrative Committee of the 1958 Agreement (AC.1) as draft Supplement 8 to the 03 series of amendments to UN Regulation No. 51.

77th GRBP session (7-10 Feb)

189th WP.29 session (6-9 Mar)

21st TFMU session (9 Nov 2022)

UN R51 Vehicle Noise

7. The expert from OICA raised a number of practical questions on collecting and analysing test data for the Real Driving Additional Sound Emission Provisions (RD ASEP) (GRBP-76-10). GRBP invited contracting parties applying UN Regulation No. 51 to prepare proposals on this issue and agreed to revert to it at the next session.

75th GRBP session (8-11 Feb 2022)

5. GRBP also addressed another proposal by IWG ASEP that introduced Real Driving Additional Sound Emission Provisions (RD ASEP) as a preliminary test procedure for the purpose of collecting experience on the new test and evaluation concept. (ECE/TRANS/WP.29/GRBP/2022/4). GRBP adopted this proposal, as amended by GRBP-75-37, and requested the secretariat to submit it for consideration and vote at the June 2022 sessions of WP.29 and AC.1 as a new Supplement to the 03 series of amendments to UN Regulation No. 51.

8. The expert of IWG MU proposed to align the entry into force of draft Supplements (GRBP-75-04-Rev.1). GRBP agreed to request WP.29 and AC.1 to postpone to their June 2022 sessions consideration of draft Supplement 7 to the 03 series of amendments to UN Regulation No. 51 (ECE/TRANS/WP.29/2022/4), in order to combine it into a consolidated proposal with the amendments mentioned in paragraphs 4, 5 and 7 above.

9. The expert from China proposed to extend the transitional period in paragraph 11.8. of the 03 series of amendments to UN Regulation No. 51, due to the difficulties in meeting the noise limits by microvans and micro-trucks available at the national market (GRBP-75-40 and GRBP-75-41). GRBP agreed to extend the transitional period until the end of 2023 and requested the secretariat to include this modification in draft Supplement 7 to the 03 series of amendments to UN Regulation No. 51 (paragraph 8 above). For any further extension, GRBP invited the expert from China to submit an official document to the next session.

UN R51 Vehicle Noise

4. The expert of IWG MU presented a revised document of reference on measurement uncertainties (ECE/TRANS/WP.29/GRBP/2022/9/Rev.1). GRBP adopted the revised document, as amended by GRBP-76-11, and requested the secretariat to publish it on the GRBP website for reference documents.

5. GRBP took note that, at the June 2022 session of WP.29, IWG MU had delivered a presentation on the general approach of how to handle measurement uncertainties in UN Regulations.

DETA

38. The expert from the Informal Working Group on the Electronic Database for the Exchange of Type Approval Documentation (IWG DETA) introduced a proposal for the extension of DETA with the aim to improve the use of the “Unique Identifier” (UI) in UN Regulations (GRBP-76-12). For the UN Regulations in the GRBP purview, he invited GRBP to:

1. Consider whether the approval markings may be replaced by a UI marking.
2. If so, determine which additional markings for consumers should remain on the products.
3. Based on a harmonized template that is to be developed, specify the content for a Summary Document in a Supplement to each UN Regulation for which the use of UI is not prohibited.

39. The Chair proposed a list of UN Regulations for which the use of UI should be prohibited (GRBP-76-30). Following an exchange of views, GRBP agreed that the use of UI in the context of GRBP UN Regulations would not bring additional benefits at this stage and requested the Chair to convey this position to WP.29 and IWG DETA. The expert from Switzerland reserved their position on this matter.

UN R164 Studded Tyres

31. On behalf of the Task Force on Studded Tyres (TF ST), the expert from Finland reported on their activities (GRBP-76-13) and introduced a proposal that included prescriptions for ice grip performance of tyres of class C1 into UN Regulation No. 164 (ECE/TRANS/WP.29/GRBP/2022/11). GRBP adopted the proposal and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 1 to UN Regulation No. 164.

UN R51 Vehicle Noise

9. The expert from OICA presented a comparison between two recent studies on the limits of sound levels of M- and N-category vehicles (GRBP-76-14). GRBP invited TF VS to discuss this topic at its forthcoming meeting in September 2022.

UN R51 Vehicle Noise

8. The expert of the Task Force on Vehicle Sound (TF VS) reported on their activities (GRBP-76-15-Rev.1).

UN R138 Quiet Road Transport Vehicles

12. GRBP was informed about the activities of the newly created Task Force on Quiet Road Transport Vehicles (TF QRTV) (GRBP-76-16).

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

17. GRBP noted that the experts from Japan decided to withdraw GRBP-76-17 and GRBP-76-18 at this stage.

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

17. GRBP noted that the experts from Japan decided to withdraw GRBP-76-17 and GRBP-76-18 at this stage.

36. GRBP took note of the highlights of the March and June 2022 sessions of WP.29 on GRBP and common issues (GRBP-76-19).

2. GRBP considered and adopted the agenda (ECE/TRANS/WP.29/GRBP/2022/10, as amended by GRBP-76-01). GRBP noted the running order proposed by the Chair (GRBP-76-20 and GRBP-76-28-Rev.1). The informal documents are listed in annex I of the session report. The GRBP informal groups are listed in annex III.

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

24. The experts from ETRTO tabled proposals which aimed to introduce provisions for type approval of special use tyres that fulfil the requirements for snow performance (ECE/TRANS/WP.29/GRBP/2022/18 and ECE/TRANS/WP.29/GRBP/2022/19).

25. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/19, as amended by GRBP-76-21, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of draft Supplement 15 to the 02 series of amendments to UN Regulation No. 117.

26. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/18 and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of draft Supplement 1 to the 03 series of amendments to UN Regulation No. 117.

189th WP.29 session (6-9 Mar)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

27. The expert from ETRTO proposed editorial corrections (ECE/TRANS/WP.29/GRBP/2022/20). GRBP adopted this proposal, as amended by GRBP-76-22, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of draft Supplement 15 to the 02 series of amendments to UN Regulation No. 117.

189th WP.29 session (6-9 Mar)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

16. The experts from the European Commission introduced a new 04 series of amendments to UN Regulation No. 117 (ECE/TRANS/WP.29/GRBP/2022/12). The expert from ETRTO proposed further modifications (GRBP-76-23 and GRBP-76-32). GRBP adopted ECE/TRANS/WP.29/GRBP/2022/12, as amended by GRBP-76-23 and GRBP-76-32, subject to the removal of the square brackets, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as the draft new 04 series of amendments to UN Regulation No. 117.

189th WP.29 session (6-9 Mar)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

20. The expert of IWG WGWT presented their proposals for the moulded standard reference test tyre and wet grip of C2, C3, and some clusters of C1 tyres in a worn state (ECE/TRANS/WP.29/GRBP/2022/22, ECE/TRANS/WP.29/GRBP/2022/23, GRBP-76-02 and GRBP-76-05). The expert from ETRTO introduced additional amendments (GRBP-76-24-Rev.1, GRBP-76-33-Rev.1 and GRBP-76-34).

21. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/22, as amended by GRBP-76-05 and GRBP-76-34, subject to the removal of the square brackets, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 1 to the 03 series of amendments to UN Regulation No. 117.

22. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/23, as amended by GRBP-76-02, GRBP-76-33-Rev.1, and GRBP-76-24-Rev.1, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of the draft new 04 series of amendments to UN Regulation No. 117.

189th WP.29 session (6-9 Mar)

33. The experts from the project on Strengthening the Effect of quieter tyres on European Roads (STEER) and from the Belgian Road Research Centre reported on uncertainty and improving the tyre noise label of the European Union (GRBP-76-26 and GRBP-76-25, respectively). GRBP invited IWG MU to address the findings of these studies.

33. The experts from the project on Strengthening the Effect of quieter tyres on European Roads (STEER) and from the Belgian Road Research Centre reported on uncertainty and improving the tyre noise label of the European Union (GRBP-76-26 and GRBP-76-25, respectively). GRBP invited IWG MU to address the findings of these studies.

41. The expert from Germany reported on the 2021 national campaign on noise emissions (GRBP-76-27) during which the Federal Motor Transport Authority (KBA) had tested various passenger cars (M1) and motorcycles (L3e) for their noise emissions in their original condition, as well as with a replacement silencing system available on the market. According to the German expert, the results had demonstrated the need to strengthen market surveillance of replacement silencers. The experts from IMMA pointed out that the industry was also tackling this issue.

2. GRBP considered and adopted the agenda (ECE/TRANS/WP.29/GRBP/2022/10, as amended by GRBP-76-01). GRBP noted the running order proposed by the Chair (GRBP-76-20 and GRBP-76-28-Rev.1). The informal documents are listed in annex I of the session report. The GRBP informal groups are listed in annex III.

UN R51 Vehicle Noise

10. The expert from China reported on their research on measurement methods for passenger vehicles and trucks in multiple driving mode conditions and to characterize the current situation and possible developments (GRBP-76-29). GRBP invited TF VS to consider this study as well.

1958 Agreement

DETA

38. The expert from the Informal Working Group on the Electronic Database for the Exchange of Type Approval Documentation (IWG DETA) introduced a proposal for the extension of DETA with the aim to improve the use of the “Unique Identifier” (UI) in UN Regulations (GRBP-76-12). For the UN Regulations in the GRBP purview, he invited GRBP to:

1. Consider whether the approval markings may be replaced by a UI marking.
2. If so, determine which additional markings for consumers should remain on the products.
3. Based on a harmonized template that is to be developed, specify the content for a Summary Document in a Supplement to each UN Regulation for which the use of UI is not prohibited.

39. The Chair proposed a list of UN Regulations for which the use of UI should be prohibited (GRBP-76-30). Following an exchange of views, GRBP agreed that the use of UI in the context of GRBP UN Regulations would not bring additional benefits at this stage and requested the Chair to convey this position to WP.29 and IWG DETA. The expert from Switzerland reserved their position on this matter.

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

23. The expert from ETRTO introduced an amendment proposal on a “traction tyre” (ECE/TRANS/WP.29/GRBP/2022/17). GRBP adopted the proposal, as amended by GRBP-76-31, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of the draft new 04 series of amendments to UN Regulation No. 117.

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

16. The experts from the European Commission introduced a new 04 series of amendments to UN Regulation No. 117 (ECE/TRANS/WP.29/GRBP/2022/12). The expert from ETRTO proposed further modifications (GRBP-76-23 and GRBP-76-32). GRBP adopted ECE/TRANS/WP.29/GRBP/2022/12, as amended by GRBP-76-23 and GRBP-76-32, subject to the removal of the square brackets, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as the draft new 04 series of amendments to UN Regulation No. 117.

189th WP.29 session (6-9 Mar)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

20. The expert of IWG WGWT presented their proposals for the moulded standard reference test tyre and wet grip of C2, C3, and some clusters of C1 tyres in a worn state (ECE/TRANS/WP.29/GRBP/2022/22, ECE/TRANS/WP.29/GRBP/2022/23, GRBP-76-02 and GRBP-76-05). The expert from ETRTO introduced additional amendments (GRBP-76-24-Rev.1, GRBP-76-33-Rev.1 and GRBP-76-34).

21. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/22, as amended by GRBP-76-05 and GRBP-76-34, subject to the removal of the square brackets, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 1 to the 03 series of amendments to UN Regulation No. 117.

22. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/23, as amended by GRBP-76-02, GRBP-76-33-Rev.1, and GRBP-76-24-Rev.1, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of the draft new 04 series of amendments to UN Regulation No. 117.

189th WP.29 session (6-9 Mar)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

20. The expert of IWG WGWT presented their proposals for the moulded standard reference test tyre and wet grip of C2, C3, and some clusters of C1 tyres in a worn state (ECE/TRANS/WP.29/GRBP/2022/22, ECE/TRANS/WP.29/GRBP/2022/23, GRBP-76-02 and GRBP-76-05). The expert from ETRTO introduced additional amendments (GRBP-76-24-Rev.1, GRBP-76-33-Rev.1 and GRBP-76-34).

21. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/22, as amended by GRBP-76-05 and GRBP-76-34, subject to the removal of the square brackets, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 1 to the 03 series of amendments to UN Regulation No. 117.

22. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/23, as amended by GRBP-76-02, GRBP-76-33-Rev.1, and GRBP-76-24-Rev.1, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of the draft new 04 series of amendments to UN Regulation No. 117.

189th WP.29 session (6-9 Mar)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

18. The expert from ISO proposed that the latest ISO 10844:2021 standard test surface be brought into UN Regulation No. 117 (ECE/TRANS/WP.29/GRBP/2022/14). The expert from ETRTO tabled additional modifications (GRBP-76-35). GRBP adopted ECE/TRANS/WP.29/GRBP/2022/14, as amended by GRBP-76-35, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 15 to the 02 series of amendments to UN Regulation No. 117.

189th WP.29 session (6-9 Mar)

37. The Chair briefly introduced a revised list of priorities (GRBP-76-36). GRBP took note of this document and invited experts to prepare comments for consideration at a separate online meeting that would be convened by the Chair in September or October 2022.

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

28. GRBP noted that all above amendments to the 03 series of amendments to UN Regulation No. 117, i.e. draft Supplement 1 to the 03 series, should also be included into the draft new 04 series of amendments to UN Regulation No. 117.

29. To facilitate consolidation of amendment proposals according to their series of amendments of UN Regulation No. 117, the expert from ETRTO prepared a summary of all relevant official and informal documents (GRBP-76-38). In this context, GRBP expressed a general concern about the late arrival of a large number of informal documents, impeding their proper consideration by experts from contracting parties.

30. GRBP noted that the consolidated amendment proposals to the 02, 03 and 04 series of amendments of UN Regulation No. 117 would be prepared in December 2022 and submitted to the March 2023 sessions of WP.29 and AC.1. In the interim, GRBP agreed to check these consolidated documents for errors at its next session in February 2023.

43. Based on GRBP-76-39-Rev.1, GRBP adopted a list of main decisions (annex II of the session report) in accordance with silence procedure.

UN R51 Vehicle Noise

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

4. The expert of IWG MU presented a revised document of reference on measurement uncertainties (ECE/TRANS/WP.29/GRBP/2022/9/Rev.1). GRBP adopted the revised document, as amended by GRBP-76-11, and requested the secretariat to publish it on the GRBP website for reference documents.

5. GRBP took note that, at the June 2022 session of WP.29, IWG MU had delivered a presentation on the general approach of how to handle measurement uncertainties in UN Regulations.

75th GRBP session (8-11 Feb 2022)

10. The expert from IWG MU introduced a general approach how to handle measurement uncertainties (ECE/TRANS/WP.29/GRBP/2022/9, as amended by GRBP-75-07, and GRBP-75-08). GRBP endorsed this document and requested the secretariat to publish it as a document of reference on the GRBP website. The expert from IWG MU pointed out that an amendment to this document would be presented at the next session. GRBP that WP.29 should be informed about the developed general approach to measurement uncertainties, because it could apply to UN Regulations beyond the scope of GRBP.

30. GRBP recalled that the reference document with a general approach and scientific background for handling measurement uncertainties in UN Regulations (ECE/TRANS/WP.29/GRBP/2022/9) was addressed under agenda item 2 (paragraph 10 above).

77th GRBP session (7-10 Feb)

21st TFMU session (9 Nov 2022)

22nd TFMU session (25 Jan)

2. GRBP considered and adopted the agenda (ECE/TRANS/WP.29/GRBP/2022/10, as amended by GRBP-76-01). GRBP noted the running order proposed by the Chair (GRBP-76-20 and GRBP-76-28-Rev.1). The informal documents are listed in annex I of the session report. The GRBP informal groups are listed in annex III.

UN R164 Studded Tyres

31. On behalf of the Task Force on Studded Tyres (TF ST), the expert from Finland reported on their activities (GRBP-76-13) and introduced a proposal that included prescriptions for ice grip performance of tyres of class C1 into UN Regulation No. 164 (ECE/TRANS/WP.29/GRBP/2022/11). GRBP adopted the proposal and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 1 to UN Regulation No. 164.

189th WP.29 session (6-9 Mar)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

16. The experts from the European Commission introduced a new 04 series of amendments to UN Regulation No. 117 (ECE/TRANS/WP.29/GRBP/2022/12). The expert from ETRTO proposed further modifications (GRBP-76-23 and GRBP-76-32). GRBP adopted ECE/TRANS/WP.29/GRBP/2022/12, as amended by GRBP-76-23 and GRBP-76-32, subject to the removal of the square brackets, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as the draft new 04 series of amendments to UN Regulation No. 117.

189th WP.29 session (6-9 Mar)

UN R51 Vehicle Noise

6. The expert from ISO proposed to bring the latest ISO 10844:2021 standard test surface into UN Regulation No. 51 (ECE/TRANS/WP.29/GRBP/2022/13). GRBP adopted this proposal and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of draft Supplement 8 to the 03 series of amendments to UN Regulation No. 51.

75th GRBP session (8-11 Feb 2022)

14. The expert from ISO reported on technical measurement development for standard ISO 16254 (GRBP-75-03). He also presented an updated standard ISO 10844:2021 (GRBP-75-02-Rev.1/Add.1) and proposed to include it into UN Regulations Nos. 51, 117 and 138 (GRBP-75-02-Rev.1). GRBP invited the expert from ISO to submit an official document to the next session.

77th GRBP session (7-10 Feb)

189th WP.29 session (6-9 Mar)

21st TFMU session (9 Nov 2022)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

18. The expert from ISO proposed that the latest ISO 10844:2021 standard test surface be brought into UN Regulation No. 117 (ECE/TRANS/WP.29/GRBP/2022/14). The expert from ETRTO tabled additional modifications (GRBP-76-35). GRBP adopted ECE/TRANS/WP.29/GRBP/2022/14, as amended by GRBP-76-35, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 15 to the 02 series of amendments to UN Regulation No. 117.

75th GRBP session (8-11 Feb 2022)

14. The expert from ISO reported on technical measurement development for standard ISO 16254 (GRBP-75-03). He also presented an updated standard ISO 10844:2021 (GRBP-75-02-Rev.1/Add.1) and proposed to include it into UN Regulations Nos. 51, 117 and 138 (GRBP-75-02-Rev.1). GRBP invited the expert from ISO to submit an official document to the next session.

189th WP.29 session (6-9 Mar)

UN R138 Quiet Road Transport Vehicles

11. The expert from ISO proposed to bring the latest ISO 10844:2021 standard test surface into UN Regulation No. 138 (ECE/TRANS/WP.29/GRBP/2022/15). GRBP adopted the proposal and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 3 to the 01 series of amendments to UN Regulation No. 138.

75th GRBP session (8-11 Feb 2022)

14. The expert from ISO reported on technical measurement development for standard ISO 16254 (GRBP-75-03). He also presented an updated standard ISO 10844:2021 (GRBP-75-02-Rev.1/Add.1) and proposed to include it into UN Regulations Nos. 51, 117 and 138 (GRBP-75-02-Rev.1). GRBP invited the expert from ISO to submit an official document to the next session.

189th WP.29 session (6-9 Mar)

UN R51 Vehicle Noise

3. GRBP noted the activities of the Informal Working Group on Measurement Uncertainties (IWG MU) (GRBP-76-08) and considered their proposal that aimed to reduce variability (ECE/TRANS/WP.29/GRBP/2022/16 and GRBP-76-09). GRBP adopted the proposal, as amended by GRBP-76-09, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and the Administrative Committee of the 1958 Agreement (AC.1) as draft Supplement 8 to the 03 series of amendments to UN Regulation No. 51.

20th TFMU session (29 Jun 2022)

77th GRBP session (7-10 Feb)

189th WP.29 session (6-9 Mar)

21st TFMU session (9 Nov 2022)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

23. The expert from ETRTO introduced an amendment proposal on a “traction tyre” (ECE/TRANS/WP.29/GRBP/2022/17). GRBP adopted the proposal, as amended by GRBP-76-31, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of the draft new 04 series of amendments to UN Regulation No. 117.

70th GRBP session (11-13 Sep 2019)

18. The expert of ETRTO pointed out the need for a new definition of “traction tyres”, because the current definition did not well segregate real traction tyres from non-traction ones (GRBP-70-19). The experts from OICA commented on the document. The Chair invited ETRTO, in cooperation with OICA, to prepare a formal proposal for consideration at the next session.

189th WP.29 session (6-9 Mar)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

24. The experts from ETRTO tabled proposals which aimed to introduce provisions for type approval of special use tyres that fulfil the requirements for snow performance (ECE/TRANS/WP.29/GRBP/2022/18 and ECE/TRANS/WP.29/GRBP/2022/19).

25. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/19, as amended by GRBP-76-21, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of draft Supplement 15 to the 02 series of amendments to UN Regulation No. 117.

26. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/18 and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of draft Supplement 1 to the 03 series of amendments to UN Regulation No. 117.

71st GRBP session (28-31 Jan 2020)

19. On behalf of the Group Of Interested Experts on snow tyre provisions (GOIE), the expert from Germany reported on their progress (GRBP-71-20). In particular, he proposed establishing a new task force on studded tyres with the objective to draft a new UN Regulation on the approval of studded tyres regarding their snow performance. GRBP endorsed this proposal and noted that the duties of the Chair and Secretary of the task force would be performed by the experts from Finland and ETRTO, respectively.

20. With additional explanations of GOIE (GRBP-71-26), GRBP resumed discussion on the new class of special use tyres intended for use under severe snow conditions (ECE/TRANS/WP.29/GRBP/2019/14). GRBP noted that the proposed new class would provide for better road safety characteristics under severe snow conditions, but with a small increase in the rolling noise. The experts from Germany, Netherlands and Russian Federation supported the proposal. The expert from EC was not in position to agree to the proposal, due to the envisaged higher noise limits which would require modifications of European Union legislation. GRBP decided to revert to this issue at the next session.

189th WP.29 session (6-9 Mar)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

24. The experts from ETRTO tabled proposals which aimed to introduce provisions for type approval of special use tyres that fulfil the requirements for snow performance (ECE/TRANS/WP.29/GRBP/2022/18 and ECE/TRANS/WP.29/GRBP/2022/19).

25. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/19, as amended by GRBP-76-21, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of draft Supplement 15 to the 02 series of amendments to UN Regulation No. 117.

26. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/18 and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of draft Supplement 1 to the 03 series of amendments to UN Regulation No. 117.

71st GRBP session (28-31 Jan 2020)

19. On behalf of the Group Of Interested Experts on snow tyre provisions (GOIE), the expert from Germany reported on their progress (GRBP-71-20). In particular, he proposed establishing a new task force on studded tyres with the objective to draft a new UN Regulation on the approval of studded tyres regarding their snow performance. GRBP endorsed this proposal and noted that the duties of the Chair and Secretary of the task force would be performed by the experts from Finland and ETRTO, respectively.

20. With additional explanations of GOIE (GRBP-71-26), GRBP resumed discussion on the new class of special use tyres intended for use under severe snow conditions (ECE/TRANS/WP.29/GRBP/2019/14). GRBP noted that the proposed new class would provide for better road safety characteristics under severe snow conditions, but with a small increase in the rolling noise. The experts from Germany, Netherlands and Russian Federation supported the proposal. The expert from EC was not in position to agree to the proposal, due to the envisaged higher noise limits which would require modifications of European Union legislation. GRBP decided to revert to this issue at the next session.

189th WP.29 session (6-9 Mar)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

27. The expert from ETRTO proposed editorial corrections (ECE/TRANS/WP.29/GRBP/2022/20). GRBP adopted this proposal, as amended by GRBP-76-22, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of draft Supplement 15 to the 02 series of amendments to UN Regulation No. 117.

74th GRBP session (15-17 Sep 2021)

21. The expert of ETRTO tabled draft amendments that introduced an “ice grip tyre” definition and editorial corrections (ECE/TRANS/WP.29/GRBP/2021/17). GRBP adopted the proposal, as amended by GRBP-74-31-Rev.1, and requested the secretariat to submit it for consideration and vote at the March 2022 sessions of WP.29 and AC.1 as draft Supplement 14 to the 02 series of amendments to UN Regulation No. 117.

23. The expert from France, in her capacity of Co-Chair IWG WGWT, presented draft amendments that introduced a procedure and thresholds on wet grip performance for C1 tyres in worn state (ECE/TRANS/WP.29/GRBP/2021/12, as updated by GRBP-74-33-Rev.1). GRBP adopted GRBP-74-33-Rev.1 and requested the secretariat to submit it for consideration and vote at the March 2022 sessions of WP.29 and AC.1 as a new draft 03 series of amendments to UN Regulation No. 117. GRBP noted that, with the aim to complete the proposal and remove few square brackets, an informal document would be prepared for the next session. If adopted, this document would also be submitted to the March 2022 sessions of WP.29 and AC.1. GRBP noted that, to avoid possible uncertainty, the adopted draft Supplement 14 to the 02 series of amendments (see para. 21 above) would be explicitly included in the future WP.29 document with the new draft 03 series of amendments to UN Regulation No. 117.

189th WP.29 session (6-9 Mar)

UN R30 Pneumatic Tires

13. Based on a study (GRBP-76-04), the expert from ETRTO proposed a new definition for “radial tyre” (ECE/TRANS/WP.29/GRBP/2022/21). The proposal also addressed 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.

14. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/21 and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 25 to the 02 series of amendments to UN Regulation No. 30.

74th GRBP session (15-17 Sep 2021)

15. The experts from France and EC introduced an updated proposal for the new definition of “radial tyre” (ECE/TRANS/WP.29/GRBP/2021/9). The same definition was also proposed for UN Regulations Nos. 54, 75, 106, 108 and 109 ECE/TRANS/WP.29/GRBP/2021/10. The experts from Canada and the United States of America raised a number of questions on the proposal (GRBP-74-07) and pointed out that they had started consultations with the authors. GRBP invited the stakeholders, in liaison with ETRTO, to continue discussions and agreed to come back to the proposal at the next session.

189th WP.29 session (6-9 Mar)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

20. The expert of IWG WGWT presented their proposals for the moulded standard reference test tyre and wet grip of C2, C3, and some clusters of C1 tyres in a worn state (ECE/TRANS/WP.29/GRBP/2022/22, ECE/TRANS/WP.29/GRBP/2022/23, GRBP-76-02 and GRBP-76-05). The expert from ETRTO introduced additional amendments (GRBP-76-24-Rev.1, GRBP-76-33-Rev.1 and GRBP-76-34).

21. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/22, as amended by GRBP-76-05 and GRBP-76-34, subject to the removal of the square brackets, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 1 to the 03 series of amendments to UN Regulation No. 117.

22. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/23, as amended by GRBP-76-02, GRBP-76-33-Rev.1, and GRBP-76-24-Rev.1, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of the draft new 04 series of amendments to UN Regulation No. 117.

77th GRBP session (7-10 Feb)

189th WP.29 session (6-9 Mar)

44th WT session (27 Jul 2022)

UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance

20. The expert of IWG WGWT presented their proposals for the moulded standard reference test tyre and wet grip of C2, C3, and some clusters of C1 tyres in a worn state (ECE/TRANS/WP.29/GRBP/2022/22, ECE/TRANS/WP.29/GRBP/2022/23, GRBP-76-02 and GRBP-76-05). The expert from ETRTO introduced additional amendments (GRBP-76-24-Rev.1, GRBP-76-33-Rev.1 and GRBP-76-34).

21. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/22, as amended by GRBP-76-05 and GRBP-76-34, subject to the removal of the square brackets, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as draft Supplement 1 to the 03 series of amendments to UN Regulation No. 117.

22. GRBP adopted ECE/TRANS/WP.29/GRBP/2022/23, as amended by GRBP-76-02, GRBP-76-33-Rev.1, and GRBP-76-24-Rev.1, and requested the secretariat to submit it for consideration and vote at the March 2023 sessions of WP.29 and AC.1 as part of the draft new 04 series of amendments to UN Regulation No. 117.

75th GRBP session (8-11 Feb 2022)

20. The experts from the Informal Working Group for Wet Grip on Worn Tyres (WGWT) reported on their progress (GRBP-75-27) and presented updated Terms of Reference of IWG WGWT (GRBP-75-28). GRBP adopted the revised Terms of Reference, as contained in Annex III to the session report.

21. GRBP recalled that, at the previous session, it had adopted draft amendments on the procedure and thresholds on wet grip performance for C1 tyres in worn state which was subsequently submitted to WP.29 as draft 03 series of amendments to UN Regulation No. 117 (ECE/TRANS/WP.29/2021/12). To complement the document, the expert from IWG WGWT tabled further amendments (GRBP-75-25-Rev.1). GRBP adopted this proposal and requested the secretariat to submit it for consideration and vote at the June 2022 sessions of WP.29 and AC.1 as part of a new 03 series of amendments to UN Regulation No. 117. The expert from IWG WGWT also presented a concept proposal for addressing wet grip requirements for C2 and C3 tyres in worn state (GRBP-75-26-Rev.1).

22. GRBP agreed to request WP.29 and AC.1 to postpone to their June 2022 sessions consideration of ECE/TRANS/WP.29/2021/12, in order to combine it into a consolidated proposal with the adopted amendments mentioned in the previous paragraph.

77th GRBP session (7-10 Feb)

189th WP.29 session (6-9 Mar)

44th WT session (27 Jul 2022)

UN R165 Reversing Warning

32. 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 (ECE/TRANS/WP.29/GRBP/2022/24 and GRBP-76-07-Rev.1). The experts from France, Germany, Japan, Russian Federation and OICA commented on the proposal. GRBP invited the expert from the United Kingdom to liaise with these experts with the aim to prepare a revised proposal for consideration at the next session.

32. 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 (ECE/TRANS/WP.29/GRBP/2022/24 and GRBP-76-07-Rev.1). The experts from France, Germany, Japan, Russian Federation and OICA commented on the proposal. GRBP invited the expert from the United Kingdom to liaise with these experts with the aim to prepare a revised proposal for consideration at the next session.

187th WP.29 session (20-24 Jun 2022)

137. The Chair of GRBP presented a draft new UN Regulation on reverse warning (agenda item 4.12.1). The World Forum considered this proposal and recommended its submission to AC.1 for voting.

138. The representative of United Kingdom of Great Britain and Northern Ireland, while recognizing the importance of the above draft new UN Regulation for safety, pointed out that his delegation would not be in a position to vote in favour of it, because of its incompatibility with the applicable national restrictions on reversing alarms during night hours (WP.29-187-11). He proposed to extend the pause function foreseen by the new Regulation to also cover such national restrictions and presented further amendments to this extent (WP.29-187-12).

139. The World Forum took note of WP.29-187-11 and WP.29-187-12 and invited United Kingdom of Great Britain and Northern Ireland to submit them for consideration to the next GRBP session in September 2022.

140. The WP.29 Secretary reminded the delegation of United Kingdom of Great Britain and Northern Ireland that their decision not to apply the new Regulation in its original form should be notified to the Office of Legal Affairs in New York (Article 1, para. 4 of the 1958 Agreement).