Presentation on the research paper “Experimental approach for evaluating uncertainties associated to stationary vehicle noise according to ISO 5725”.

Task force chair discussion presentation on “How to Reflect Revisions on Requirements for Backward Field of Vision – by Transcription or by Reference? Advantages and Disadvantages”.

Proposal from the ASEP II informal group for clarifications to the Regulation.

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

Proposal to transpose the modified requirements for non-original replacement exhaust silencing systems (NORESS) from UN R92 (Replacement exhaust silencing systems for motorcycles) into UN R59.

Summary of discussions in the VRU-Proxi informal group on reversing detection and field of view.

Proposal to align the provisions for retreaded tyres to be tested and marked with the three-peak-mountain snow-flake (3PMSF) symbol with the amendment proposals to UN R117 (document GRBP/2019/19).

Proposal to correct inconsistencies on the exemption conditions for the additional sound emission provisions (ASEP) for vehicles with variable gear ratios or automatic transmission with non-lockable gear ratios.

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.

Proposal to clarify that the gear ratio i+1 by definition has an acceleration (not an “engine speed”) lower than gear ratio i.