Session 187 | Hybrid Geneva | 20-24 Jun
4.9.1. Proposal for a new 03 series of amendments to UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)

ECE/TRANS/WP.29/GRBP/72, para. 23 and ECE/TRANS/WP.29/GRBP/73, based on GRBP-74-33-Rev.1, ECE/TRANS/WP.29/GRBP/2021/17 as amended by GRBP-74-31-Rev.1 and GRBP-75-25-Rev.1.

WP.29/2022/83 | UN R117: Proposal for new 03 series of amendments Proposal to introduce a procedure and thresholds on wet grip performance for C1 tyres in worn state.
WP.29/2022/83 | UN R117: Proposal for new 03 series of amendments Proposal to introduce a procedure and thresholds on wet grip performance for C1 tyres in worn state.
8.5. General approach to measurement uncertainties in UN Regulations

At its previous session, the World Forum noted that the GRBP Informal Working Group on Measurement Uncertainties (IWG MU) had developed a general approach how to handle measurement uncertainties which could apply not only to UN Regulations under GRBP, but also to other UN Regulations (ECE/TRANS/WP.29/1164, para. 62). The Chair of IWG MU will brief WP.29 on the concept.

WP.29-187-06 | Status report of the informal group on Noise Measurement Uncertainties
WP.29-187-06
Status report of the informal group on Noise Measurement Uncertainties
17 May 2022 World Forum Informal Documents Vehicle Noise Emissions Vehicle Noise Uniform Provisions Concerning the Approval of Motor Vehicles having at least Four Wheels with regard to their Noise Emissions Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance WP.29-187-0006
WP.29/2022/83
UN R117: Proposal for new 03 series of amendments
16 May 2022 World Forum Formal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal to introduce a procedure and thresholds on wet grip performance for C1 tyres in worn state. WP.29/2022/0083