Session 73 | Geneva | 26-29 Jan 2021
3. UN Regulation No. 51 (Noise of M and N categories of vehicles)

GRBP will be informed about the activities of the Informal Working Group on Additional Sound Emission Provisions (IWG ASEP) and of the Informal Working Group on Measurement Uncertainties (IWG MU) and will address proposals prepared by these IWGs.

GRBP-73-05 | UN R51: Proposal for 04 series of amendments Proposal by experts from IWG ASEP for new series of amendments.
GRBP-73-14/Rev.1 | Status report of the Sound Measurement Uncertainties informal working group
GRBP-73-15 | General Approach to Estimate Sound Measurement Uncertainties
GRBP-73-16 | Revised terms of reference for the Sound Measurement Uncertainties informal group
GRBP-73-17 | UN R51: Proposal to amend the 03 series of amendments Measurement Uncertainties informal group proposal to clarify the text and to amend:<ol class="alpha"><li>Annex 3, Paragraph 1.4. to delete determination of the vehicle speed by independent speed measuring devices</li><li>Annex 3, Paragraph 1.5. to clarify that no determination of the wind speed is needed for indoor testing</li><li>Annex 3, Paragraph 2.1.3. to clarify and differentiate between indoor and outdoor testing</li><li>Annex 3, Paragraph 2.1.3.1.2. to clarify the temperature range for indoor facilities.</li><li>Annex 3, Paragraph 2.1.3.2.2. to clarify the temperature range for outdoor facilities.</li></ol>

GRBP may wish to consider additional submissions concerning UN R51.

GRBP-73-25 | Study on future sound-limit values
GRBP-73-05 | UN R51: Proposal for 04 series of amendments Proposal by experts from IWG ASEP for new series of amendments.
GRBP-73-14/Rev.1 | Status report of the Sound Measurement Uncertainties informal working group
GRBP-73-15 | General Approach to Estimate Sound Measurement Uncertainties
GRBP-73-16 | Revised terms of reference for the Sound Measurement Uncertainties informal group
GRBP-73-17 | UN R51: Proposal to amend the 03 series of amendments Measurement Uncertainties informal group proposal to clarify the text and to amend:<ol class="alpha"><li>Annex 3, Paragraph 1.4. to delete determination of the vehicle speed by independent speed measuring devices</li><li>Annex 3, Paragraph 1.5. to clarify that no determination of the wind speed is needed for indoor testing</li><li>Annex 3, Paragraph 2.1.3. to clarify and differentiate between indoor and outdoor testing</li><li>Annex 3, Paragraph 2.1.3.1.2. to clarify the temperature range for indoor facilities.</li><li>Annex 3, Paragraph 2.1.3.2.2. to clarify the temperature range for outdoor facilities.</li></ol>
GRBP-73-25 | Study on future sound-limit values
GRBP-73-11 | ETRTO Tyre Performance Study 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.
GRBP-73-23 | Study on sound level limits of M- and N-category vehicles
GRBP/28/Rev.1
Draft list of main decisions during the 73rd (January 2021) GRBP session
01 Feb 2021 Working Party Report Pneumatic Tires Pneumatic Tires Uniform Provisions Concerning the Approval of Pneumatic Tyres for Motor Vehicles and their Trailers Motorcycle Noise Motorcycle Noise Uniform Provisions Concerning the Approval of Motor Cycles with regard to Noise Vehicle Noise Emissions Vehicle Noise Uniform Provisions Concerning the Approval of Motor Vehicles having at least Four Wheels with regard to their Noise Emissions Motorcycle and Moped Tires Motorcycle Tires Uniform Provisions Concerning the Approval of Pneumatic Tyres for Motor Cycles and Mopeds Retreaded Tires for Commercial Vehicles CV Retreaded Tires Uniform Provisions Concerning the Approval for the Production of Retreaded Pneumatic Tyres for Commercial Vehicles and their Trailers 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 Passenger Car and Trailer Wheels Passenger Car/Trailer Wheels Uniform Provisions Concerning the Approval of Wheels for Passenger Cars and their Trailers Tire Pressure Monitoring Systems Tire Pressure Monitoring Systems Uniform provisions concerning the approval of vehicles with regard to their tyre pressure monitoring systems Audible Reversing Warning Systems Reversing Warning UN Regulation for the Approval of Studded Tyres Studded Tyres GRBP-2021-0028/Rev.1
GRBP-73-05
UN R51: Proposal for 04 series of amendments
19 Jan 2021 Working Party 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 Proposal by experts from IWG ASEP for new series of amendments. GRBP-73-0005
GRBP-73-11
ETRTO Tyre Performance Study (ETRTO)
21 Jan 2021 Working Party 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 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. GRBP-73-0011
GRBP-73-14/Rev.1
Status report of the Sound Measurement Uncertainties informal working group
29 Jan 2021 Working Party 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 GRBP-73-0014/Rev.1
GRBP-73-15
General Approach to Estimate Sound Measurement Uncertainties
21 Jan 2021 Working Party 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 GRBP-73-0015
GRBP-73-16
Revised terms of reference for the Sound Measurement Uncertainties informal group
21 Jan 2021 Working Party 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 GRBP-73-0016
GRBP-73-17
UN R51: Proposal to amend the 03 series of amendments
21 Jan 2021 Working Party 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 Measurement Uncertainties informal group proposal to clarify the text and to amend:<ol class="alpha"><li>Annex 3, Paragraph 1.4. to delete determination of the vehicle speed by independent speed measuring devices</li><li>Annex 3, Paragraph 1.5. to clarify that no determination of the wind speed is needed for indoor testing</li><li>Annex 3, Paragraph 2.1.3. to clarify and differentiate between indoor and outdoor testing</li><li>Annex 3, Paragraph 2.1.3.1.2. to clarify the temperature range for indoor facilities.</li><li>Annex 3, Paragraph 2.1.3.2.2. to clarify the temperature range for outdoor facilities.</li></ol> GRBP-73-0017
GRBP-73-23
Study on sound level limits of M- and N-category vehicles (EC)
29 Jan 2021 Working Party 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 GRBP-73-0023
GRBP-73-24
Priorities of the Working Party on Noise and Tyres (GRBP)
29 Jan 2021 Working Party Informal Documents Motorcycle Noise Motorcycle Noise Uniform Provisions Concerning the Approval of Motor Cycles with regard to Noise 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 Audible Reversing Warning Systems Reversing Warning GRBP-73-0024
GRBP-73-25
Study on future sound-limit values (ACEA)
29 Jan 2021 Working Party 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 GRBP-73-0025