Proposal is to correct an omission regarding the compensating resevoir fill time thereby aligning UN R41 with the other noise UN Regulations Nos. 9, 51 and 63.

5. The expert from IMMA proposed correcting an omission (ECE/TRANS/WP.29/GRBP/2019/24). GRBP adopted the document, but agreed to postpone its submission to WP.29 and AC.1, awaiting other amendment proposals.

3. The expert from IMMA presented a revised proposal which aims to minimize a proliferation of approval numbers (ECE/TRANS/WP.29/GRBP/2019/25/Rev.1 and GRBP-71-18-Rev.2). Following an in-depth discussion, GRBP adopted the proposal, as laid down in Annex II. GRBP requested the secretariat to submit it to WP.29 and the Administrative Committee (AC.1) for consideration and vote at their June 2020 sessions as a draft Supplement 8 to the 04 series of amendments to UN Regulation No. 41, together with ECE/TRANS/WP.29/GRBP/2019/24 adopted at the previous session.

Proposal to allow multiple exhaust and/or silencing system configurations to be explicitly listed under the same motorcycle type approval in order to reduce redundancy and number of separate approvals and documentation.

4. The expert from IMMA proposed amendments with the aim to minimize proliferation of approval numbers from models with differences in vehicle exhaust and silencing systems (ECE/TRANS/WP.29/GRBP/2019/25). The experts from Germany, Japan, Russian Federation and Spain commented on the proposal. The Chair invited IMMA to prepare a revised document for the next session.

Proposal to minimize proliferation of approval numbers from models with differences in vehicle exhaust and silencing systems.

4. The expert from IMMA proposed amendments with the aim to minimize proliferation of approval numbers from models with differences in vehicle exhaust and silencing systems (ECE/TRANS/WP.29/GRBP/2019/25). The experts from Germany, Japan, Russian Federation and Spain commented on the proposal. The Chair invited IMMA to prepare a revised document for the next session.

3. The expert from IMMA presented a revised proposal which aims to minimize a proliferation of approval numbers (ECE/TRANS/WP.29/GRBP/2019/25/Rev.1 and GRBP-71-18-Rev.2). Following an in-depth discussion, GRBP adopted the proposal, as laid down in Annex II. GRBP requested the secretariat to submit it to WP.29 and the Administrative Committee (AC.1) for consideration and vote at their June 2020 sessions as a draft Supplement 8 to the 04 series of amendments to UN Regulation No. 41, together with ECE/TRANS/WP.29/GRBP/2019/24 adopted at the previous session.

Report on discussions within the Group of Interested Experts on provisions for UN R117.

15. GRBP was briefed on the activities of IWG on Wet Grip Performance of Tyres in a Worn State (IWG WGWT) (GRBP-70-23) and noted that IWG WGWT planned to submit an informal document to the seventy-second session of GRBP (September 2020) and a working document for adoption at the seventy-third session (January 2021). GRBP agreed that IWG would be co-chaired by France and the European Commission. The GRBP Chair encouraged all experts to participate in IWG WGWT.

16. The expert of EC proposed enlarging the scope of IWG WGWT to C2/C3 tyres and some further modifications to its Terms of Reference (GRBP-70-03). The experts from France and Japan were of the view out that C1 tyres should remain a priority for IWG WGWT and that C2/C3 tyres should only be addressed afterwards. The experts from the Netherlands and ETRTO pointed out that the behaviour of C2/C3 tyres in a worn state is completely different from C1 tyres. GRBP decided to revert to the issue at the next session and requested IWG WGWT to consider this idea in the interim. GRBP agreed to other modifications to the Terms of Reference, as laid down in Annex IV of the session report.

15. GRBP was briefed on the activities of IWG on Wet Grip Performance of Tyres in a Worn State (IWG WGWT) (GRBP-70-23) and noted that IWG WGWT planned to submit an informal document to the seventy-second session of GRBP (September 2020) and a working document for adoption at the seventy-third session (January 2021). GRBP agreed that IWG would be co-chaired by France and the European Commission. The GRBP Chair encouraged all experts to participate in IWG WGWT.

16. The expert of EC proposed enlarging the scope of IWG WGWT to C2/C3 tyres and some further modifications to its Terms of Reference (GRBP-70-03). The experts from France and Japan were of the view out that C1 tyres should remain a priority for IWG WGWT and that C2/C3 tyres should only be addressed afterwards. The experts from the Netherlands and ETRTO pointed out that the behaviour of C2/C3 tyres in a worn state is completely different from C1 tyres. GRBP decided to revert to the issue at the next session and requested IWG WGWT to consider this idea in the interim. GRBP agreed to other modifications to the Terms of Reference, as laid down in Annex IV of the session report.

15. GRBP was briefed on the activities of IWG on Wet Grip Performance of Tyres in a Worn State (IWG WGWT) (GRBP-70-23) and noted that IWG WGWT planned to submit an informal document to the seventy-second session of GRBP (September 2020) and a working document for adoption at the seventy-third session (January 2021). GRBP agreed that IWG would be co-chaired by France and the European Commission. The GRBP Chair encouraged all experts to participate in IWG WGWT.

16. The expert of EC proposed enlarging the scope of IWG WGWT to C2/C3 tyres and some further modifications to its Terms of Reference (GRBP-70-03). The experts from France and Japan were of the view out that C1 tyres should remain a priority for IWG WGWT and that C2/C3 tyres should only be addressed afterwards. The experts from the Netherlands and ETRTO pointed out that the behaviour of C2/C3 tyres in a worn state is completely different from C1 tyres. GRBP decided to revert to the issue at the next session and requested IWG WGWT to consider this idea in the interim. GRBP agreed to other modifications to the Terms of Reference, as laid down in Annex IV of the session report.

Proposal from the group of interested experts to allow for the type approval of special-use tyres designed for severe snow conditions.

13. On behalf of the group of interested experts (GOIE) on snow tyre provisions, the experts from Germany and ETRTO introduced draft amendments which would allow the type approval of special use tyres that fulfil the requirements for snow performance in Annex 7 (ECE/TRANS/WP.29/GRBP/2019/14). The experts of China, Netherlands, Sweden, Switzerland and OICA raised several questions on the proposed new definitions and limits. The expert from EC made a reservation, because the EU member States should first reach a common position on the proposal which would set up new less stringent limits. The expert of the Russian Federation, being part of GOIE, volunteered to deliver a presentation at the next session with the aim to provide additional explanations. GRBP decided to continue this discussion at the next session.

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.

30. The expert from ETRTO introduced draft amendments to UN Regulation No. 117 (ECE/TRANS/WP.29/GRVA/2018/5 and GRB-68-12). The proposal received comments from the experts of Germany, Spain, United States of America and BIPAVER. The Chair invited other experts to transmit their remarks to ETRTO with a view to submitting a revised consolidated proposal to the next session.

23. The expert from ETRTO recalled their proposal for draft amendments tabled at the previous session (ECE/TRANS/WP.29/GRVA/2018/5 and GRB-68-12) and requested GRB to postpone the discussion to the next session.

14. The expert from ETRTO recalled the postponed proposal for amendments (ECE/TRANS/WP.29/GRVA/2018/5 and GRB-68-12) and presented complementary modifications (ECE/TRANS/WP.29/GRBP/2019/19, GRBP-70-21-Rev.2). Various experts posed clarifying questions, in particular, on the use of terms “repeatability” and “reproducibility”. Following an in-depth discussion, GRBP adopted the proposals, as amended by Annex III, and requested the secretariat to submit them to WP.29 and AC.1 for consideration and vote at their March 2020 sessions as a draft Supplement 11 to the 02 series of amendments to UN Regulation No. 117.

2. GRB considered and adopted the agenda (ECE/TRANS/WP.29/GRB/2018/5 and Add.1) as well as noted the running order proposed by the Chair (GRB-68-05). The list of informal documents is contained in Annex I. The list of GRB informal groups is reproduced in Annex IV.

Addendum to integrate agenda items taken over from GRRF following its “conversion” into GRVA.

2. GRB considered and adopted the agenda (ECE/TRANS/WP.29/GRB/2018/5 and Add.1) as well as noted the running order proposed by the Chair (GRB-68-05). The list of informal documents is contained in Annex I. The list of GRB informal groups is reproduced in Annex IV.

15. GRBP was briefed on the activities of IWG on Wet Grip Performance of Tyres in a Worn State (IWG WGWT) (GRBP-70-23) and noted that IWG WGWT planned to submit an informal document to the seventy-second session of GRBP (September 2020) and a working document for adoption at the seventy-third session (January 2021). GRBP agreed that IWG would be co-chaired by France and the European Commission. The GRBP Chair encouraged all experts to participate in IWG WGWT.

16. The expert of EC proposed enlarging the scope of IWG WGWT to C2/C3 tyres and some further modifications to its Terms of Reference (GRBP-70-03). The experts from France and Japan were of the view out that C1 tyres should remain a priority for IWG WGWT and that C2/C3 tyres should only be addressed afterwards. The experts from the Netherlands and ETRTO pointed out that the behaviour of C2/C3 tyres in a worn state is completely different from C1 tyres. GRBP decided to revert to the issue at the next session and requested IWG WGWT to consider this idea in the interim. GRBP agreed to other modifications to the Terms of Reference, as laid down in Annex IV of the session report.

Proposal for an amendment to complement the content of working document GRVA/2018/5. The proposal includes amendments to:

1. The Standard Reference Test Tyre (SRTT) denominations
2. Remove the discrimination between the two Class C3 tyres
3. Clarify that there are no C3 tyres in the scope of this UN Regulation “not marked with speed symbol”
4. Align Annex 6 with the most recent amendments made to standard ISO 28580
5. Define “standard deviation” as appropriate in the text
6. Clarify that, in the cases of C2 and C3 tyres, the “Reference (test) pressure” and the value “Pr” correspond to the indication of the inflation pressure which is always marked on the sidewall
7. Use “repeatability” in lieu of inaccurate “reproducibility”
8. Update test report forms
9. Include the date on which the new proposed supplement of UN Regulation No. 117 will apply
10. Improve the description of the evaluation of the rolling sound emission test
Correct the figure in Annex 2, Appendix 2, and
11. Update cross references pursuant to paragraph renumbering.

14. The expert from ETRTO recalled the postponed proposal for amendments (ECE/TRANS/WP.29/GRVA/2018/5 and GRB-68-12) and presented complementary modifications (ECE/TRANS/WP.29/GRBP/2019/19, GRBP-70-21-Rev.2). Various experts posed clarifying questions, in particular, on the use of terms “repeatability” and “reproducibility”. Following an in-depth discussion, GRBP adopted the proposals, as amended by Annex III, and requested the secretariat to submit them to WP.29 and AC.1 for consideration and vote at their March 2020 sessions as a draft Supplement 11 to the 02 series of amendments to UN Regulation No. 117.

15. GRBP was briefed on the activities of IWG on Wet Grip Performance of Tyres in a Worn State (IWG WGWT) (GRBP-70-23) and noted that IWG WGWT planned to submit an informal document to the seventy-second session of GRBP (September 2020) and a working document for adoption at the seventy-third session (January 2021). GRBP agreed that IWG would be co-chaired by France and the European Commission. The GRBP Chair encouraged all experts to participate in IWG WGWT.

16. The expert of EC proposed enlarging the scope of IWG WGWT to C2/C3 tyres and some further modifications to its Terms of Reference (GRBP-70-03). The experts from France and Japan were of the view out that C1 tyres should remain a priority for IWG WGWT and that C2/C3 tyres should only be addressed afterwards. The experts from the Netherlands and ETRTO pointed out that the behaviour of C2/C3 tyres in a worn state is completely different from C1 tyres. GRBP decided to revert to the issue at the next session and requested IWG WGWT to consider this idea in the interim. GRBP agreed to other modifications to the Terms of Reference, as laid down in Annex IV of the session report.

15. GRBP was briefed on the activities of IWG on Wet Grip Performance of Tyres in a Worn State (IWG WGWT) (GRBP-70-23) and noted that IWG WGWT planned to submit an informal document to the seventy-second session of GRBP (September 2020) and a working document for adoption at the seventy-third session (January 2021). GRBP agreed that IWG would be co-chaired by France and the European Commission. The GRBP Chair encouraged all experts to participate in IWG WGWT.

16. The expert of EC proposed enlarging the scope of IWG WGWT to C2/C3 tyres and some further modifications to its Terms of Reference (GRBP-70-03). The experts from France and Japan were of the view out that C1 tyres should remain a priority for IWG WGWT and that C2/C3 tyres should only be addressed afterwards. The experts from the Netherlands and ETRTO pointed out that the behaviour of C2/C3 tyres in a worn state is completely different from C1 tyres. GRBP decided to revert to the issue at the next session and requested IWG WGWT to consider this idea in the interim. GRBP agreed to other modifications to the Terms of Reference, as laid down in Annex IV of the session report.

17. The expert from ETRTO provided an update of tyre industry and ISO activities on improving the wet grip test method for passenger car tyres (C1) (GRBP-70-20) and indicated his intention to submit a working document to the next session of GRBP. The Chair encouraged GRBP experts to send their comments to ETRTO.

15. GRBP was briefed on the activities of IWG on Wet Grip Performance of Tyres in a Worn State (IWG WGWT) (GRBP-70-23) and noted that IWG WGWT planned to submit an informal document to the seventy-second session of GRBP (September 2020) and a working document for adoption at the seventy-third session (January 2021). GRBP agreed that IWG would be co-chaired by France and the European Commission. The GRBP Chair encouraged all experts to participate in IWG WGWT.

16. The expert of EC proposed enlarging the scope of IWG WGWT to C2/C3 tyres and some further modifications to its Terms of Reference (GRBP-70-03). The experts from France and Japan were of the view out that C1 tyres should remain a priority for IWG WGWT and that C2/C3 tyres should only be addressed afterwards. The experts from the Netherlands and ETRTO pointed out that the behaviour of C2/C3 tyres in a worn state is completely different from C1 tyres. GRBP decided to revert to the issue at the next session and requested IWG WGWT to consider this idea in the interim. GRBP agreed to other modifications to the Terms of Reference, as laid down in Annex IV of the session report.

Table of GRBP regulatory priorities and timelines.

29. The Chair presented a revised document on priorities of the future work (GRBP-70-10). The expert from EC reported on their ongoing study on requirements and test procedures for the tyre pressure monitoring system (TPMS) for vehicle categories M2, M3, N2, N3, O3 and O4 (GRBP-70-14) which might result in preparing amendment proposals to UN Regulation No. 141 on TPMS. GRBP decided to come back to the list of priorities, once the outcome of the study would be known.

Table of GRBP regulatory priorities and timelines.

29. The Chair presented a revised document on priorities of the future work (GRBP-70-10). The expert from EC reported on their ongoing study on requirements and test procedures for the tyre pressure monitoring system (TPMS) for vehicle categories M2, M3, N2, N3, O3 and O4 (GRBP-70-14) which might result in preparing amendment proposals to UN Regulation No. 141 on TPMS. GRBP decided to come back to the list of priorities, once the outcome of the study would be known.

28. The expert of OICA reported on a study with the aim to determine the inter-dependency between the rolling sound, rolling resistance and the main safety performances by carrying out tests according to regulatory or standard procedures (GRBP-70-25). The expert from OICA pointed out, that given the budget constraints, the study had focused on C1 tyres. The study results indicated a conflict between the rolling sound and safety performances, like wet grip, dry grip and lateral aquaplaning. According to the expert, a low level of rolling sound could not be proven as feasible without compromising other parameters essential for vehicle safety and CO2 emission reduction. He added that a full study report would soon be available. Various experts thanked OICA for the study and indicated they would further consider its results. The Chair invited experts to transmit their comments to OICA, if any.

28. The expert of OICA reported on a study with the aim to determine the inter-dependency between the rolling sound, rolling resistance and the main safety performances by carrying out tests according to regulatory or standard procedures (GRBP-70-25). The expert from OICA pointed out, that given the budget constraints, the study had focused on C1 tyres. The study results indicated a conflict between the rolling sound and safety performances, like wet grip, dry grip and lateral aquaplaning. According to the expert, a low level of rolling sound could not be proven as feasible without compromising other parameters essential for vehicle safety and CO2 emission reduction. He added that a full study report would soon be available. Various experts thanked OICA for the study and indicated they would further consider its results. The Chair invited experts to transmit their comments to OICA, if any.

33. The expert of OICA briefed GRB about a forthcoming study with the aim to find out if lowering the rolling sound limits would affect other tyre parameters essential for vehicle safety and CO2 reduction (GRB-69-25-Rev.1). GRB took note of this information and invited OICA to report the outcome of the study at the next session.

Table of GRBP regulatory priorities and timelines.

29. The Chair presented a revised document on priorities of the future work (GRBP-70-10). The expert from EC reported on their ongoing study on requirements and test procedures for the tyre pressure monitoring system (TPMS) for vehicle categories M2, M3, N2, N3, O3 and O4 (GRBP-70-14) which might result in preparing amendment proposals to UN Regulation No. 141 on TPMS. GRBP decided to come back to the list of priorities, once the outcome of the study would be known.

Table of GRBP regulatory priorities and timelines.

29. The Chair presented a revised document on priorities of the future work (GRBP-70-10). The expert from EC reported on their ongoing study on requirements and test procedures for the tyre pressure monitoring system (TPMS) for vehicle categories M2, M3, N2, N3, O3 and O4 (GRBP-70-14) which might result in preparing amendment proposals to UN Regulation No. 141 on TPMS. GRBP decided to come back to the list of priorities, once the outcome of the study would be known.

28. The expert of OICA reported on a study with the aim to determine the inter-dependency between the rolling sound, rolling resistance and the main safety performances by carrying out tests according to regulatory or standard procedures (GRBP-70-25). The expert from OICA pointed out, that given the budget constraints, the study had focused on C1 tyres. The study results indicated a conflict between the rolling sound and safety performances, like wet grip, dry grip and lateral aquaplaning. According to the expert, a low level of rolling sound could not be proven as feasible without compromising other parameters essential for vehicle safety and CO2 emission reduction. He added that a full study report would soon be available. Various experts thanked OICA for the study and indicated they would further consider its results. The Chair invited experts to transmit their comments to OICA, if any.

28. The expert of OICA reported on a study with the aim to determine the inter-dependency between the rolling sound, rolling resistance and the main safety performances by carrying out tests according to regulatory or standard procedures (GRBP-70-25). The expert from OICA pointed out, that given the budget constraints, the study had focused on C1 tyres. The study results indicated a conflict between the rolling sound and safety performances, like wet grip, dry grip and lateral aquaplaning. According to the expert, a low level of rolling sound could not be proven as feasible without compromising other parameters essential for vehicle safety and CO2 emission reduction. He added that a full study report would soon be available. Various experts thanked OICA for the study and indicated they would further consider its results. The Chair invited experts to transmit their comments to OICA, if any.

Presentation on the status of the 2019 update to ISO 16254 (Acoustics – Measurement of sound emitted by road vehicles of category M and N at standstill and low speed operation – Engineering method). ISO 16254 specifies an engineering method for measuring the sound emitted by M and N category road vehicles at standstill and low speed operating conditions.

32. The expert of ISO reported on development of ISO 16254 and invited GRBP experts to participate in the evaluation process (GRBP-70-09).

30. The expert from the Russian Federation presented GRBP-70-07 on the emissions of hazardous substances and particulate matters caused by wear of tyres and roadway, which contaminates urban atmosphere. GRBP took note of this information as well as of the position of the European Tyre and Rubber Manufacturer’s Association (ETRMA) (GRBP-70-16). The expert from EC mentioned the ongoing European Union study on the subject. The Chair acknowledged the importance of this issue and recalled that it had been allocated to the Working Party on Pollution and Energy (GRPE) and its Informal Working Group on Particle Measurement Programme (IWG PMP).

30. The expert from the Russian Federation presented GRBP-70-07 on the emissions of hazardous substances and particulate matters caused by wear of tyres and roadway, which contaminates urban atmosphere. GRBP took note of this information as well as of the position of the European Tyre and Rubber Manufacturer’s Association (ETRMA) (GRBP-70-16). The expert from EC mentioned the ongoing European Union study on the subject. The Chair acknowledged the importance of this issue and recalled that it had been allocated to the Working Party on Pollution and Energy (GRPE) and its Informal Working Group on Particle Measurement Programme (IWG PMP).

30. The expert from the Russian Federation presented GRBP-70-07 on the emissions of hazardous substances and particulate matters caused by wear of tyres and roadway, which contaminates urban atmosphere. GRBP took note of this information as well as of the position of the European Tyre and Rubber Manufacturer’s Association (ETRMA) (GRBP-70-16). The expert from EC mentioned the ongoing European Union study on the subject. The Chair acknowledged the importance of this issue and recalled that it had been allocated to the Working Party on Pollution and Energy (GRPE) and its Informal Working Group on Particle Measurement Programme (IWG PMP).

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.

Presentation on the status of the 2019 update to ISO 16254 (Acoustics – Measurement of sound emitted by road vehicles of category M and N at standstill and low speed operation – Engineering method). ISO 16254 specifies an engineering method for measuring the sound emitted by M and N category road vehicles at standstill and low speed operating conditions.

32. The expert of ISO reported on development of ISO 16254 and invited GRBP experts to participate in the evaluation process (GRBP-70-09).

30. The expert from the Russian Federation presented GRBP-70-07 on the emissions of hazardous substances and particulate matters caused by wear of tyres and roadway, which contaminates urban atmosphere. GRBP took note of this information as well as of the position of the European Tyre and Rubber Manufacturer’s Association (ETRMA) (GRBP-70-16). The expert from EC mentioned the ongoing European Union study on the subject. The Chair acknowledged the importance of this issue and recalled that it had been allocated to the Working Party on Pollution and Energy (GRPE) and its Informal Working Group on Particle Measurement Programme (IWG PMP).

30. The expert from the Russian Federation presented GRBP-70-07 on the emissions of hazardous substances and particulate matters caused by wear of tyres and roadway, which contaminates urban atmosphere. GRBP took note of this information as well as of the position of the European Tyre and Rubber Manufacturer’s Association (ETRMA) (GRBP-70-16). The expert from EC mentioned the ongoing European Union study on the subject. The Chair acknowledged the importance of this issue and recalled that it had been allocated to the Working Party on Pollution and Energy (GRPE) and its Informal Working Group on Particle Measurement Programme (IWG PMP).

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.

Presentation on the status of the 2019 update to ISO 16254 (Acoustics – Measurement of sound emitted by road vehicles of category M and N at standstill and low speed operation – Engineering method). ISO 16254 specifies an engineering method for measuring the sound emitted by M and N category road vehicles at standstill and low speed operating conditions.

32. The expert of ISO reported on development of ISO 16254 and invited GRBP experts to participate in the evaluation process (GRBP-70-09).

30. The expert from the Russian Federation presented GRBP-70-07 on the emissions of hazardous substances and particulate matters caused by wear of tyres and roadway, which contaminates urban atmosphere. GRBP took note of this information as well as of the position of the European Tyre and Rubber Manufacturer’s Association (ETRMA) (GRBP-70-16). The expert from EC mentioned the ongoing European Union study on the subject. The Chair acknowledged the importance of this issue and recalled that it had been allocated to the Working Party on Pollution and Energy (GRPE) and its Informal Working Group on Particle Measurement Programme (IWG PMP).

30. The expert from the Russian Federation presented GRBP-70-07 on the emissions of hazardous substances and particulate matters caused by wear of tyres and roadway, which contaminates urban atmosphere. GRBP took note of this information as well as of the position of the European Tyre and Rubber Manufacturer’s Association (ETRMA) (GRBP-70-16). The expert from EC mentioned the ongoing European Union study on the subject. The Chair acknowledged the importance of this issue and recalled that it had been allocated to the Working Party on Pollution and Energy (GRPE) and its Informal Working Group on Particle Measurement Programme (IWG PMP).

30. The expert from the Russian Federation presented GRBP-70-07 on the emissions of hazardous substances and particulate matters caused by wear of tyres and roadway, which contaminates urban atmosphere. GRBP took note of this information as well as of the position of the European Tyre and Rubber Manufacturer’s Association (ETRMA) (GRBP-70-16). The expert from EC mentioned the ongoing European Union study on the subject. The Chair acknowledged the importance of this issue and recalled that it had been allocated to the Working Party on Pollution and Energy (GRPE) and its Informal Working Group on Particle Measurement Programme (IWG PMP).

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.