GAR | Motor Vehicle Emissions

Thursday, 21 August 2025
Week 34

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Latest Documents

20 Aug 2025 | Electric Vehicles and the Environment: Agenda for the 87th (Septembe...

20 Aug 2025 | Proposal for Tyre Abrasion Index Stage 2 | TA-37-09

20 Aug 2025 | Tyre abrasion: XL tyres allowance | TA-37-08

20 Aug 2025 | proposal for "Road Legal Race" tyre definition | TA-37-07

19 Aug 2025 | UN R51: Draft proposal to amend document GRBP/2025/25 | GRBP-TFAVRS-...

19 Aug 2025 | ADS Marker Lamps: Report on Outdoor Observation Experiment to Invest...

19 Aug 2025 | Tyre abrasion: Consideration of improving the accuracy of the drum t...

19 Aug 2025 | Tyre abrasion: Feedback on document GRBP/2025/27 (proposal for new U...

(29 posted during the past week)

Electric Vehicles and the Environment: Agenda for the 87th (September 2025) session

Reference Number:	EVE-87-01/Rev.1
Meeting Session(s):	87th EVE session (4 Sep)
Document date:	20 Aug 25
Regarding:	GTR No. 21 EV Power Determination \| GTR No. 22 EV Battery Durability \| HD EV Battery Durability

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.pdf format

Proposal for Tyre Abrasion Index Stage 2

Reference Number:	TA-37-09
Submitted by:	France
Meeting Session(s):	37th TA session (21 Aug)
Document date:	20 Aug 25
Regarding:	Tyre abrasion

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.pdf format

Tyre abrasion: XL tyres allowance

Reference Number:	TA-37-08
Submitted by:	ETRTO
Meeting Session(s):	37th TA session (21 Aug)
Document date:	20 Aug 25
Regarding:	Tyre abrasion

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.ppt format

proposal for "Road Legal Race" tyre definition

Reference Number:	TA-37-07
Submitted by:	ETRTO
Meeting Session(s):	37th TA session (21 Aug)
Document date:	20 Aug 25
Regarding:	Tyre abrasion

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.ppt format

UN R51: Draft proposal to amend document GRBP/2025/25

Reference Number:	GRBP-TFAVRS-17-06
Meeting Session(s):	17th GRBP-TFAVRS session (20 Aug)
Document date:	19 Aug 25
Regarding:	UN R51 Vehicle Noise \| Regulation Screening for ADS
View full document file for more information

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.docx format

ADS Marker Lamps: Report on Outdoor Observation Experiment to Investigate Requirements

Reference Number:	AVSR-26-02/Rev.1
Submitted by:	NTSEL
Meeting Session(s):	26th AVSR session (1 Jul)
Document date:	19 Aug 25
Regarding:	AV Signaling Requirements

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.ppt format

Tyre abrasion: Consideration of improving the accuracy of the drum test method

Reference Number:	TA-37-06
Submitted by:	JASIC
Meeting Session(s):	37th TA session (21 Aug)
Document date:	19 Aug 25
Regarding:	Tyre abrasion

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.pdf format

Tyre abrasion: Feedback on document GRBP/2025/27 (proposal for new UN Regulation)

Reference Number:	TA-37-05
Meeting Session(s):	37th TA session (21 Aug)
Document date:	19 Aug 25
Regarding:	Tyre abrasion
View full document file for more information

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.docx format

Upcoming Meetings

Task Force on Tyre Abrasion | Session 37 | 21 Aug

Informal Working Group on Children Left in Vehicles | Session 11 | 26-28...

Wet Grip on Worn Tyres | Session 69 | 26 Aug

Informal Working Group on Artificial Intelligence | Session 1 | 27 Aug

A-LCA Subgroup 2: Material & Material Recycling | Session 23 | 28 Aug

Working Party on Noise and Tyres | Session 82 | 3-5 Sep

Electric Vehicles and the Environment | Session 87 | 4 Sep

Working Party on Automated and Connected Vehicles | GRVA Scenarios Works...

Electric Vehicle Safety | Session 30 | 9-11 Sep

Simplification of Lighting and Light-Signalling Regulations | Session 74...

Informal Working Group on Automated Driving Systems | Session 13 | 10-11...

Automotive Life Cycle Assessment | Session 26 | 10 Sep

View complete calendar

Latest Changes to Regulations

10 Jul 2025 UN R13-H Revision 4 | Amendment 6 (Light Vehicle Braking)

Regulation:	UN Regulation No. 13-H \| Light-Duty Vehicle Braking
Document:	Revision 4 \| Amendment 6
Corresponds to:	02 series of amendments (Entered into force on 12 Jun 2025)
Based on:	Document WP.29/2024/147 Proposal to align UN R13-H with technical advances and the emergence of a new type of braking system that employs stored electrical energy for both the control transmission and the energy transmission. Document WP.29-194-08

7 Jul 2025 UN R172 Corrigendum 1 (Traction/snow retreaded tyres)

Regulation:	UN Regulation No. 172 \| Retreaded tyres: Snow performance and/or traction classification
Document:	Corrigendum 1

13 Mar 2025 UN R172 UN R172 (Traction/snow retreaded tyres)

Regulation:	UN Regulation No. 172 \| Retreaded tyres: Snow performance and/or traction classification
Document:	UN R172
Corresponds to:	Original text (Entered into force on 10 Jan 2025)
Based on:	Document WP.29/2024/75

12 Mar 2025 UN R138 Revision 1 | Amendment 4 (Quiet Road Transport Vehicles)

Regulation:	UN Regulation No. 138 \| Quiet Road Transport Vehicles
Document:	Revision 1 \| Amendment 4
Corresponds to:	02 series of amendments (Entered into force on 10 Jan 2025)
Based on:	Document WP.29/2024/66 Proposal to specify the working principles of an Acoustic Vehicle Alerting System (AVAS) and to reduce measurement uncertainties during the measurement of the one third octave bands.

27 Jan 2025 UN R13-H Revision 4 | Amendment 5 (Light Vehicle Braking)

Regulation:	UN Regulation No. 13-H \| Light-Duty Vehicle Braking
Document:	Revision 4 \| Amendment 5
Corresponds to:	01 series of amendments \| Supplement 5 (Entered into force on 10 Jan 2025)
Based on:	Document WP.29/2024/59 Proposal to adapt the regulation to allow for the approval of vehicles equipped with both an Automated Driving System and a manual driving mode.

9 Jan 2025 UN R167 Amendment 1 (CV Direct Vision)

Regulation:	UN Regulation No. 167 \| UN Regulation on Commercial Vehicle Direct Vision
Document:	Amendment 1
Corresponds to:	Original text \| Supplement 1 (Entered into force on 22 Sep 2024)
Based on:	Document WP.29/2024/13 Proposal to introduce an alternative method for assessment of the frontal visible volume to address future cab designs with narrower distances between A pillars. The current measurement method is dependent on the position of the A pillar. The alternative method is independent of the cab design and would be available for use at the manufacturer’s discretion.

16 Dec 2024 UN R148 Revision 1 | Amendment 2 (Light-Signalling Devices)

Regulation:	UN Regulation No. 148 \| Light-Signalling Devices (LSD)
Document:	Revision 1 \| Amendment 2
Corresponds to:	01 series of amendments \| Supplement 2 (Entered into force on 22 Sep 2024)
Based on:	Document WP.29/2024/23 Proposal to clarify and correct the text and improve the definition of photometric stability.

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UN Regulation No. 83

Motor Vehicle Emissions

Series of amendments
Revisions
Contracting Parties (52)
Documents ( 4 Aug 2025)
Meetings (14 Oct 2025)
Notifications (17 Jan 2024)

2025

2024

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2008

UN R83: Proposal for Supplement 2 to the 08 series of amendments

Proposal to delete reference numbers to absent footnotes (delete orphaned reference numbers).

Reference Number:	WP.29/2025/27
Meeting Session(s):	195th WP.29 session (3-7 Mar)
Document date:	24 Dec 24
Document status:	Adopted by WP.29
Regarding:	UN R83 Motor Vehicle Emissions
View full document file for more information

Download from UNECE:

.pdf format

.docx format

AV screening; Input on UN R83.08

Reference Number:	TF-AVRS-19-12
Submitted by:	EC
Meeting Session(s):	19th TF-AVRS session (2 Dec 2024)
Document date:	19 Dec 24
Regarding:	UN R83 Motor Vehicle Emissions \| Regulation Screening for ADS
View full document file for more information

Download from UNECE:

.docx format

AV screening: Input on UN R83.08

Reference Number:	TF-AVRS-19-11
Submitted by:	EC
Meeting Session(s):	19th TF-AVRS session (2 Dec 2024)
Document date:	19 Dec 24
Regarding:	UN R83 Motor Vehicle Emissions \| Regulation Screening for ADS
View full document file for more information

Download from UNECE:

.xls format

UN R83: Proposal for a new Supplement to the 06 and 07 Series of Amendments

Proposal to amend the scope to allow type approval of vehicles that previously where only within the scope as an extension based on their reference mass.

Reference Number:	GRPE-91-12/Rev.1
Submitted by:	OICA
Meeting Session(s):	91st GRPE session (14-16 Oct 2024)
Document date:	10 Oct 24
Document status:	Superseded
Regarding:	UN R83 Motor Vehicle Emissions
View full document file for more information

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.pdf format

.docx format

UN R83: Proposal for a Supplement to the 08 Series of Amendments

Proposal to amend the scope of UN Regulation No. 83 to allow type approval of vehicles that previously where only within the scope as an extension based on their reference mass.

Reference Number:	GRPE-91-13
Submitted by:	OICA
Meeting Session(s):	91st GRPE session (14-16 Oct 2024)
Document date:	10 Oct 24
Document status:	Informal GR review
Regarding:	UN R83 Motor Vehicle Emissions

Download from UNECE:

.pdf format

.docx format

UN R83: Proposal for a new Supplement to the 08 series of amendments

Remove references to footnotes that are non-existent.

Reference Number:	GRPE/2024/19
Submitted by:	France
Meeting Session(s):	91st GRPE session (14-16 Oct 2024)
Document date:	21 Aug 24
Document status:	Superseded
Regarding:	UN R83 Motor Vehicle Emissions
View full document file for more information

Download from UNECE:

.pdf format

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Minutes of the 13th GRPE AVRS task force session of the 13th (April 2024) TF-AVRS informal group session

Reference Number:	TF-AVRS-13-07
Meeting Session(s):	13th TF-AVRS session (23 Apr 2024)
Document date:	25 Apr 24
Regarding:	UN R24 Diesel Engine Emissions \| UN R49 Diesel/CNG/LNG Engine Emissions \| UN R68 Maximum Speed Measurement \| UN R83 Motor Vehicle Emissions \| UN R85 Net Power Measurement \| UN R101 CO2 Emissions/Fuel Consumption \| UN R115 LPG/CNG Retrofit Systems \| UN R133 Vehicle Recyclability \| UN R143 HD Dual Fuel Retrofit Systems \| UN R154 WLTP Type Approval \| GTR No. 2 WMTC \| GTR No. 15 WLTP \| GTR No. 19 Evaporative emissions \| GTR No. 21 EV Power Determination \| Regulation Screening for ADS

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.docx format

UN R83: Proposal for Supplement 18 to the 05 series of amendments

Proposal to extend the option from the 06 and 07 to the 05 series of amendments allowing the calculation of road load values from those determined according to UN GTR No.15 (WLTP).

Reference Number:	WP.29/2024/47
Meeting Session(s):	193rd WP.29 session (24-28 Jun 2024)
Document date:	11 Apr 24
Document status:	Adopted by WP.29
Regarding:	UN R83 Motor Vehicle Emissions
View full document file for more information

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.pdf format

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UN R83: Proposal for Supplement 20 to the 06 series of amendments

Proposal for amendments to align UN R83 with provisions of UN R154 (WLTP).

Reference Number:	WP.29/2024/48
Meeting Session(s):	193rd WP.29 session (24-28 Jun 2024)
Document date:	11 Apr 24
Document status:	Adopted by WP.29
Regarding:	UN R83 Motor Vehicle Emissions
View full document file for more information

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.pdf format

.docx format

UN R83: Proposal for Supplement 1 to the 08 series of amendments

Proposal to introduce corrections and clarifications to the 08 series of amendments.

Reference Number:	WP.29/2024/50
Meeting Session(s):	193rd WP.29 session (24-28 Jun 2024)
Document date:	11 Apr 24
Document status:	Adopted by WP.29
Regarding:	UN R83 Motor Vehicle Emissions
View full document file for more information

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.pdf format

.docx format

UN R83: Proposal for Supplement 17 to the 07 series of amendments

Proposal for amendments to align UN R83 with UN R154 (WLTP).

Reference Number:	WP.29/2024/49
Meeting Session(s):	193rd WP.29 session (24-28 Jun 2024)
Document date:	11 Apr 24
Document status:	Adopted by WP.29
Regarding:	UN R83 Motor Vehicle Emissions
View full document file for more information

Download from UNECE:

.pdf format

.docx format

UN R83: Proposal for a new Supplement to the 05, 06 and 07 series of amendments

Proposal to align with UN R154

Reference Number:	GRPE-90-09/Rev.1
Submitted by:	OICA
Meeting Session(s):	90th GRPE session (9-12 Jan 2024)
Document date:	22 Dec 23
Document status:	Superseded
Regarding:	UN R83 Motor Vehicle Emissions
View full document file for more information

Download from UNECE:

.pdf format

.docx format


24 Dec 2024	UN R83: Proposal for Supplement 2 to the 08 series of amendments	WP.29/2025/27	2024-12-24
19 Dec 2024	AV screening; Input on UN R83.08 (EC)	TF-AVRS-19-12	2024-12-19
19 Dec 2024	AV screening: Input on UN R83.08 (EC)	TF-AVRS-19-11	2024-12-19
10 Oct 2024	UN R83: Proposal for a new Supplement to the 06 and 07 Series of Amendments (OICA)	GRPE-91-12/Rev.1	2024-10-10
10 Oct 2024	UN R83: Proposal for a Supplement to the 08 Series of Amendments (OICA)	GRPE-91-13	2024-10-10
21 Aug 2024	UN R83: Proposal for a new Supplement to the 08 series of amendments (France)	GRPE/2024/19	2024-08-21
25 Apr 2024	Minutes of the 13th GRPE AVRS task force session of the 13th (April 2024) TF-AVRS informal group session	TF-AVRS-13-07	2024-04-25
11 Apr 2024	UN R83: Proposal for Supplement 18 to the 05 series of amendments	WP.29/2024/47	2024-04-11
11 Apr 2024	UN R83: Proposal for Supplement 20 to the 06 series of amendments	WP.29/2024/48	2024-04-11
11 Apr 2024	UN R83: Proposal for Supplement 1 to the 08 series of amendments	WP.29/2024/50	2024-04-11
11 Apr 2024	UN R83: Proposal for Supplement 17 to the 07 series of amendments	WP.29/2024/49	2024-04-11
10 Jan 2024	UN R83: Proposal for a new Supplement to the 05, 06 and 07 series of amendments (OICA)	GRPE-90-09/Rev.1	2024-01-10