Proposal to expand the scope of the activity to include C2 and C3 tyres.

Updated comments prepared by the secretary based on Japan’s original document.

Consolidation of comments from documents TFRWS-15-03-Rev.3 and TFRWS-16-03-Rev.1.

Proposal to correct some references, which need to be updated as a consequence of document WP.29/2020/70, adopted at the June 2020 WP.29 session, notably

1. Paragraph 5.4.1 renumbered as paragraph 5.5.1.
2. Paragraphs 5.4. and 5.5. respectively renumbered as paragraphs 5.5. and 5.6.

Draft proposal as of 15 January 2021.

Proposal by experts from IWG ASEP for new series of amendments.

Email (.msg format) raising a question on the application of UN R156 to noise requirements under UN R51with regard to possible risk of deviation from limits resulting from a software update.

Proposal to include requirements for wet grip of tyres of classes C2 and C3 in worn state to the scope of the working group activities.

Overview of UTAC CERAM testing designed to consider the impact of additional tightening of tyre performance limits on the balance
between legal requirements (rolling resistance, wet grip and rolling sound emission) and other performance aspects not subject to legal requirements.

Measurement Uncertainties informal group proposal to clarify the text and to amend:

1. Annex 3, Paragraph 1.4. to delete determination of the vehicle speed by independent speed measuring devices
2. Annex 3, Paragraph 1.5. to clarify that no determination of the wind speed is needed for indoor testing
3. Annex 3, Paragraph 2.1.3. to clarify and differentiate between indoor and outdoor testing
4. Annex 3, Paragraph 2.1.3.1.2. to clarify the temperature range for indoor facilities.
5. Annex 3, Paragraph 2.1.3.2.2. to clarify the temperature range for outdoor facilities.

Proposal to replace “markings” by “approval mark” in paragraph 4.4.1. to clearly specify the intended application of the provision (i.e., to the approval mark, not to all markings).

Presentation on wet grip test issue concerning to use of SRTT_worn for RRT.

Proposal to correct some references, which need to be updated as a consequence of document WP.29/2020/70, adopted at the June 2020 WP.29 session, notably

1. Paragraph 5.4.1 renumbered as paragraph 5.5.1.
2. Paragraphs 5.4. and 5.5. respectively renumbered as paragraphs 5.5. and 5.6.

Proposal to correct some references, which need to be updated as a consequence of document WP.29/2020/70, adopted at the June 2020 WP.29 session, notably

1. Paragraph 5.4.1 renumbered as paragraph 5.5.1.
2. Paragraphs 5.4. and 5.5. respectively renumbered as paragraphs 5.5. and 5.6.

Revised version including task force chair’s comments of the original OICA submission.

Final draft of the Noise Measurement Uncertainties task force.

Proposal to introduce a procedure and thresholds on wet grip performance for tyres in worn state for C1 tyres as submitted to GRBP by the Worn Tyres working group.

The Phenomena study was seeking to define the potential of measures capable of delivering significant reductions (20%-50%) of health burden arising from the environmental noise of roads, railways and aircraft, and to assess how relevant noise related legislation could increase the implementation of the most effective measures, while considering the constraints and specificities of each transport mode.