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UN R41: Proposal for a Supplement 5 to the 05 series of amendments
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Reference Number: WP.29/2026/4
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Proposal to clarify the gear selection procedure pursuant to the amendment to allow deviation from the reference acceleration awot,ref requirement for Conformity of Production tests.
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Meeting Sessions: 198th WP.29 session (9-13
Mar)
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Document date: 17 Dec 25
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Document status: Adopted by WP.29
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Relevant to: UN Regulation No. 41 | Motorcycle Noise
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Adoption Vote
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This proposal (WP.29/2026/4) was adopted by the World Forum. Thirty-three Contracting Parties out of the 52 applying UN R41 were present for the vote by AC.1. Thirty-three voted in favor with zero against and zero abstaining.
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Click here to view the full document file
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UN R41: Proposal for a Supplement 1 to the 06 series of amendments
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Reference Number: WP.29/2026/5
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Proposal to clarify the gear selection procedure pursuant to the amendment to allow deviation from the reference acceleration awot,ref requirement for Conformity of Production tests.
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Meeting Sessions: 198th WP.29 session (9-13
Mar)
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Document date: 05 Jan 26
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Document status: Adopted by WP.29
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Relevant to: UN Regulation No. 41 | Motorcycle Noise
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Adoption Vote
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This proposal (WP.29/2026/5) was adopted by the World Forum. Thirty-three Contracting Parties out of the 52 applying UN R41 were present for the vote by AC.1. Thirty-three voted in favor with zero against and zero abstaining.
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Click here to view the full document file
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UN R41: Proposal for a Supplement 13 to the 04 series of amendments
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Reference Number: WP.29/2026/3
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Proposal to amend paragraph 8.4 to allow Conformity of Production tests to use different acceleration values when environmental conditions or rider mass prevent achieving the reference acceleration (awot,ref ) with the same gear used during type approval testing.
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Meeting Sessions: 198th WP.29 session (9-13
Mar)
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Document date: 05 Jan 26
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Document status: Adopted by WP.29
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Relevant to: UN Regulation No. 41 | Motorcycle Noise
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Adoption Vote
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This proposal (WP.29/2026/3) was adopted by the World Forum. Thirty-three Contracting Parties out of the 52 applying UN R41 were present for the vote by AC.1. Thirty-three voted in favor with zero against and zero abstaining.
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Click here to view the full document file
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RD-ASEP status report to GRBP
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Reference Number: GRBP-83-XX
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IWG RD-ASEP is developing a mandatory procedure for UN R51 after the monitoring phase, with R41 work concluded. The Data Analysis Task Force reported in October 2025 on vehicle database sufficiency, boundary conditions, and CVT vehicle modeling. An Editing Task Force created a consolidated R51.04 draft reviewed in December 2025. IWG RD-ASEP recommends that no monitoring requirements be approved without corresponding mechanisms to collect, analyze, and report results. Submission targets shifted to September 2026 for informal document and February 2027 for working document due to database finalization and financial support needs.
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Meeting Sessions: 11th RDASEP session (10 Feb)
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Document date: 12 Jan 26
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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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Documents 2026
3073 documents
1 Dec 2025
UN R51: Proposal for Supplement 11 to the 03 series of amendments
R51/R138-17-03
5 Dec 2025
RDASEP Data Analysis task force: Agenda for the 5th (December 2025) session
RDASEP-TFDA-05-01/Rev.1
5 Dec 2025
RD-ASEP: Considerations for Sound Expected Model
RDASEP-TFDA-05-02
8 Dec 2025
UN R51: Input on transitional provisions for Supplement 11 to the 03 series
R51/R138-17-04
8 Dec 2025
UN R51: Background Information on EV specifications
R51/R138-17-05
8 Dec 2025
UN R51: Proposal to amend GRBP/2026/4 (Supplement 11 to the 03 series)
R51/R138-17-06
10 Dec 2025
RD-ASEP: Minutes of the 9th (October 2025) session
RDASEP-09-05
10 Dec 2025
UN R51: Updated proposal to amend GRBP/2026/4 (Supplement 11 to the 03 series)
R51/R138-17-07
10 Dec 2025
UN R51: Updated proposal for a Supplement 11 to the 03 series of amendments
R51/R138-17-08
11 Dec 2025
RD-ASEP: Agenda for the 10th (December 2025) session
RDASEP-10-01
11 Dec 2025
RD-ASEP issues list
RDASEP-10-02
11 Dec 2025
UN R51: Working draft for a 04 series of amendments
RDASEP-10-03
11 Dec 2025
RD-ASEP informal group 2026 calendar
RDASEP-10-04
19 Dec 2025
UN R41: Proposal for a Supplement 5 to the 05 series of amendments
WP.29/2026/4
28 Dec 2025
Considerations for the design of the RD-ASEP control range
RDASEP-10-05
30 Dec 2025
UN R41: Proposal for a Supplement 1 to the 06 series of amendments
WP.29/2026/5
31 Dec 2025
UN R41: Proposal for a Supplement 13 to the 04 series of amendments
WP.29/2026/3
6 Jan 2026
RDASEP Data Analysis task force: Summary of the 5th (December 2025) session
RDASEP-TFDA-05-03
6 Jan 2026
Data Analysis task force report to RD-ASEP informal group
RDASEP-TFDA-05-04
11 Jan 2026
RDASEP Data Analysis task force: Agenda for the 6th (January 2026) session
RDASEP-TFDA-06-01
12 Jan 2026
RD-ASEP: Agenda for the 11th (February 2026) session
RDASEP-11-01
12 Jan 2026
RD-ASEP status report to GRBP
GRBP-83-XX
12 Jan 2026
UN R51: Draft proposal to amend GRBP/2026/4
R51/R138-18-04
12 Jan 2026
Tyre Abrasion: Agenda for the 41st (January 2026) session
TA-41-01/Rev.1
13 Jan 2026
R51/R138 Subgroup: Agenda for the 18th (January 2026) session
R51/R138-18-01