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UN R51: Proposal to amend the 03 series of amendments
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Reference Number: GRBP-73-17
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Measurement Uncertainties informal group proposal to clarify the text and to amend: - Annex 3, Paragraph 1.4. to delete determination of the vehicle speed by independent speed measuring devices
- Annex 3, Paragraph 1.5. to clarify that no determination of the wind speed is needed for indoor testing
- Annex 3, Paragraph 2.1.3. to clarify and differentiate between indoor and outdoor testing
- Annex 3, Paragraph 2.1.3.1.2. to clarify the temperature range for indoor facilities.
- Annex 3, Paragraph 2.1.3.2.2. to clarify the temperature range for outdoor facilities.
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Meeting Sessions: 73rd GRBP session (26-29
Jan 2021)
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Document date: 21 Jan 21
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Document status: Informal GR review
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Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions
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Click here to view the full document file
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Draft list of main decisions during the 73rd (January 2021) GRBP session
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Reference Number: GRBP/28/Rev.1
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Meeting Sessions: 73rd GRBP session (26-29
Jan 2021)
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Document date: 29 Jan 21
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Relevant to: UN Regulation No. 30 | Pneumatic Tires, UN Regulation No. 41 | Motorcycle Noise, UN Regulation No. 51 | Vehicle Noise Emissions, UN Regulation No. 75 | Motorcycle and Moped Tires, UN Regulation No. 109 | Retreaded Tires for Commercial Vehicles, UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance, UN Regulation No. 124 | Passenger Car and Trailer Wheels, UN Regulation No. 141 | Tyre Pressure Monitoring Systems, UN Regulation No. 165 | Audible Reversing Warning Systems, and UN Regulation No. 164 | Type Approval of Studded Tyres
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Click here to view the full document file
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Documents 2026
3073 documents
20 Jan 2021
Attendance list from the 17th Worn Tyres working group session
WT-17-06
20 Jan 2021
Draft Worn Tyres working group status report to GRBP
WT-17-07
20 Jan 2021
UN R51 and software update requirements under UN R156
ASEP II-DG-02
21 Jan 2021
ETRTO Tyre Performance Study
GRBP-73-11
21 Jan 2021
General Approach to Estimate Sound Measurement Uncertainties
GRBP-73-15
21 Jan 2021
Revised terms of reference for the Sound Measurement Uncertainties informal group
GRBP-73-16
21 Jan 2021
UN R51: Proposal to amend the 03 series of amendments
GRBP-73-17
21 Jan 2021
Proposal to amend the Worn Tyres working group terms of reference
GRBP-73-08
21 Jan 2021
Status report of the Worn Tyres working group
GRBP-73-18
21 Jan 2021
UN R117: Proposal to introduce an Ice Tyre definition for C1 class tyres
GRBP-73-19
21 Jan 2021
Status report of the Reversing Warning Sounds task force
GRBP-73-12
29 Jan 2021
Tyre industry preliminary assessment of wet grip on worn C2 and C3 tyres
GRBP-73-22
29 Jan 2021
Working group on Worn Tyres: Proposal for revised terms of reference
GRBP-73-27/Rev.1
29 Jan 2021
Status report of the Sound Measurement Uncertainties informal working group
GRBP-73-14/Rev.1
29 Jan 2021
Study on sound level limits of M- and N-category vehicles
GRBP-73-23
29 Jan 2021
Study on future sound-limit values
GRBP-73-25
29 Jan 2021
UN R51: 04 series amendments (GRBP-73-04) revision with track changes
ASEP II-DG-03
29 Jan 2021
Technical support for the impact assessment on Euro 5 step of L-category sound emissions level limits
GRBP-73-26
29 Jan 2021
Priorities of the Working Party on Noise and Tyres (GRBP)
GRBP-73-24
1 Feb 2021
Draft list of main decisions during the 73rd (January 2021) GRBP session
GRBP/28/Rev.1
17 Feb 2021
Draft agenda for the 18th Worn Tyres working group session
WT-18-01
19 Feb 2021
Draft agenda for the 9th TFMU task force session
TFMU-09-01
19 Feb 2021
Noise measurement uncertainties: Draft heavy commercial vehicle calculation sheet
TFMU-08-04
19 Feb 2021
UN R51: Vehicle selection and preparation for testing under the 03 series of amendments
TFMU-07-04/Rev.1
21 Feb 2021
Temperature effects on tyre/road noise– presentations from the STEER project
TFMU-09-02
Vehicle and Tyre Noise