The Working Party on Lighting and Light-Signalling (GRE) prepares regulatory proposals on light-related vehicle safety systems for consideration by the World Forum/WP.29. The GRE enables more than 70 government, industry, and other interested experts to cooperate in the development of regulatory requirements through joint research and validation of test procedures.
GRE works especially closely with the International Automotive Lighting and Light-signalling Expert Group (more commonly known as the GTB), a global group of vehicle manufacturers, system suppliers, light source manufacturers, testing laboratories and academia working to assure the effective regulation and safety of automotive lighting systems and their installation.
GRE usually convenes in March and October of each year.
| UN R148: Proposal for amendment 01 series of amendments |
| Reference Number: GRE-94-55 |
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Proposal to replace “multiple separate light sources” with “multiple light sources” in the provision governing rear position lamps reciprocally incorporated with stop lamps. |
| Submitted by: China |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 29 Apr 26 |
| Relevant to: UN Regulation No. 148 | Light-Signalling Devices (LSD) |
| Click here to view the full document file |
| UN R10: Proposal for Supplement 3 to 07 series of amendments |
| Reference Number: GRE-94-56/Rev.2 |
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Proposal to introduce Automated Driving System (ADS) requirements into the Regulation and correct figures in Appendix 8. The proposal inserts new introductory paragraphs addressing vehicles of categories X and Y equipped with an ADS; amends paragraph 1.3 to include ADS control requirements; inserts new paragraph 2.9.4 on ADS presence; extensively revises paragraph 2.12 on immunity related functions to include ADS-related functions; deletes paragraphs 2.26 and 2.27; inserts new paragraph 2.32 defining “ADS test configuration” |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 29 Apr 26 |
| Relevant to: UN Regulation No. 10 | Electromagnetic Compatibility |
| Click here to view the full document file |
| Energy Saving Opportunities in Automotive Lighting: GTB Activities Status Report |
| Reference Number: GRE-94-54 |
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A 2025 study by TU Darmstadt concluded that a daylight running light passing-beam switching threshold of 500lx is preferable at sunset, and that adaptive DRL values lower than 400cd seem sufficient. The GTB is developing amendment proposals for DRL/low beam switching thresholds, adaptive DRL, and Class V ECO mode. Annual energy saving potentials range from 55 GWh to 141 GWh across evaluated use cases, with highest savings from DRL intensity adaptation and reduced low beam in city nighttime driving. |
| Submitted by: GTB |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 28 Apr 26 |
| Click here to view the full document file |
| UN R10 : IWG EMC Status report |
| Reference Number: GRE-94-53 |
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IWG EMC prepared supplement 3 to the 07 series of amendments to UN R10, with terminological adjustments for ADS adoption, addition of categories X and Y, technical refinement of ADS including a new ADS table in Annex 6 paragraph 2.1.1.2, and modifications to artificial networks with discharge voltage below 50 V and maximum discharge time of 20 seconds. For the 08 series, approved proposals are prioritised on a roadmap. |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 28 Apr 26 |
| Relevant to: UN Regulation No. 10 | Electromagnetic Compatibility |
| Click here to view the full document file |
| Highlights from WP.1 with relevance to GRE |
| Reference Number: GRE-94-52 |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 28 Apr 26 |
| Click here to view the full document file |
| Update provisional agenda |
| Reference Number: GRE-94-01 |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 27 Apr 26 |
| Click here to view the full document file |
| GRSP Informal Working Group on Children Left In Vehicles |
| Reference Number: GRE-94-15/Rev.1 |
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This paper is to inform relevant GRs of the ongoing activities within the CLIV informal group and the potential influence on the work under the responsibilities of the GRs. CLIV is in Phase 2 developing a new UN Regulation on Children Left in Vehicles for vehicle categories M1, M2, M3 and N1. The draft regulation includes requirements for visual and audible external warnings upon detecting a CLIV event. The IWG prioritises development for buses first, then light vehicles. The draft regulation aims to mitigate risk of serious or fatal injuries to children left in vehicles. Upon detecting a CLIV event, visual and audible external warnings will be generated using an SOS morse code pattern to distinguish from existing warnings. |
| Submitted by: |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 24 Apr 26 |
| Relevant to: WP.29 Regulatory Project | Children left in vehicles |
| Click here to view the full document file |
| Survey Outcome among VRUs on Direction Indicator Projection |
| Reference Number: GRE-94-51 |
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Survey of Vulnerable Road Users associations on Direction Indicator Projection, Independent third-party research from six countries confirms safety benefits and lack of confusion and analysis shows most VRU collisions occur in urban areas near junctions during vehicle turning. |
| Submitted by: GTB |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 24 Apr 26 |
| Click here to view the full document file |
| UN R148: Proposal for corrections of text |
| Reference Number: GRE-94-50 |
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Proposal to editorially correct approved proposal GRE/2024/21/Rev.1 and WP.29/2025/112. Editorial corrections amend paragraph 1 to include reversing projectors and direction indicator projectors in scope. New paragraph 3.1.2.10 requires drawings showing relative position of direction indicator projector and lamp. Tables 1 and 2 are amended to add reversing projector and direction indicator projector entries. |
| Submitted by: GTB |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 24 Apr 26 |
| Relevant to: UN Regulation No. 148 | Light-Signalling Devices (LSD) |
| Click here to view the full document file |
| UN R48: Proposal for editorial corrections GRE/2024/21/Rev.1 |
| Reference Number: GRE-94-49 |
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Proposal to add editorial corrections to UN R48 series 06 to 09 based on GRE/2024/21/Rev.1 and WP.29/2025/114. Changes include inserting definitions for direction indicator projector, basic element, and direction indicator projection; adding requirements for direction indicator projections |
| Submitted by: GTB |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 24 Apr 26 |
| Relevant to: UN Regulation No. 48 | Installation of Lighting and Lighting-Signalling Equipment |
| Click here to view the full document file |
| UN R48: Proposal for a Supplement to the 06, 07, 08 and 09 series of amendments |
| Reference Number: GRE-94-48 |
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Presentation on visualisation of signals for help |
| Submitted by: Czech Republic |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 24 Apr 26 |
| Relevant to: UN Regulation No. 48 | Installation of Lighting and Lighting-Signalling Equipment |
| Click here to view the full document file |
| ADS - Presentation on Marker lamp SAE J3134 |
| Reference Number: GRE-94-47 |
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Presents the SAE J3134 review of Automated Driving System (ADS) Marker Lamp Requirements |
| Submitted by: SAE |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 24 Apr 26 |
| Relevant to: WP.29 Regulatory Project | Automated Driving Systems |
| Click here to view the full document file |
| UN R10: Proposal for Supplement 3 to the 07 Series of amendments |
| Reference Number: GRE-94-46 |
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Proposal to amend to fit Automated Driving System (ADS) requirements. New provisions introduce vehicles of categories X and Y equipped with an ADS, extending application to vehicles without driver’s compartment and manual driving controls. |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 24 Apr 26 |
| Relevant to: UN Regulation No. 10 | Electromagnetic Compatibility |
| Click here to view the full document file |
| UN R48: Proposal for a new series of amendments |
| Reference Number: GRE-94-45 |
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Proposal provides an alternative proposal to GRE/2024/12 Revision 2 as amended by GRE-93-28 Revision 1 . |
| Submitted by: OICA |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 24 Apr 26 |
| Relevant to: UN Regulation No. 48 | Installation of Lighting and Lighting-Signalling Equipment |
| Click here to view the full document file |
| UN R48: Position paper on ADS marker lamps / external identification of ADS Status with using lighting functions - Safety, security and implementation concerns |
| Reference Number: GRE-94-44 |
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Paper introduces an ADS marker lamp to identify vehicles operating with an Automated Driving System. Industry does not seek to mandate such a lamp. It identifies safety and security concerns including no demonstrated real-world net safety benefit, targeting and public violence risks, cargo robbery risks, child safeguarding concerns, cyber-physical attack surface expansion, and spoofing and misuse potential. |
| Submitted by: OICA |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 24 Apr 26 |
| Relevant to: UN Regulation No. 48 | Installation of Lighting and Lighting-Signalling Equipment |
| Click here to view the full document file |
| UN R48: Proposal for a Supplement to the 08 to 09 Series of amendments |
| Reference Number: GRE-94-43/Rev.2 |
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Proposal clarifies the “Manufacturer logo” means a light emitting graphic mark, emblem, word, or combination of those elements used to aid public identification of a vehicle manufacturer’s brand name when the function is switched ON. Improved justification for the proposal |
| Submitted by: OICA |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 30 Apr 26 |
| Relevant to: UN Regulation No. 48 | Installation of Lighting and Lighting-Signalling Equipment |
| Click here to view the full document file |
| UN R48: Proposal for a Supplement to the 08 to 09 Series of amendments |
| Reference Number: GRE-94-42 |
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Proposal to add VRU warning pattern requirements. Document presents data from accident databases showing pedestrian crossing conflicts represent the highest proportion of nighttime road accidents at approximately 32% with obstructions and 19% without. Limited visibility and restricted communication between drivers and VRUs necessitates an assistance function. A spotlight feature with a bright narrow beam pattern directed at hazardous VRUs, moving with the target and flashing to remind drivers while warning VRUs, received positive feedback from customer experience surveys |
| Submitted by: China |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 24 Apr 26 |
| Relevant to: UN Regulation No. 48 | Installation of Lighting and Lighting-Signalling Equipment |
| Click here to view the full document file |
| UN R48: Highlights of the baseline amendments for 10 series of amendments |
| Reference Number: GRE-94-41 |
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Proposal for editorial work with thorough review and consistency improvements. New informative Annexes for lamp positioning and geometric visibility angles are added. Technical prescriptions now pertain only to the new series. Light source provisions are clarified regarding technological neutrality, usage of light source modules, and non-replaceable light sources. |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 24 Apr 26 |
| Relevant to: UN Regulation No. 48 | Installation of Lighting and Lighting-Signalling Equipment and WP.29 Regulatory Project | Simplification of Lighting Regulations |
| Click here to view the full document file |
| UN R48: Revision 6 of 04 series of amendments |
| Reference Number: GRE-94-40 |
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Proposal applies to vehicles of categories T, R, and S and agricultural NRMM regarding lighting and light-signalling device installation. The regulation establishes approval procedures, general specifications for lamp fitting and adjustment, electrical connections, and individual specifications for various lighting functions including driving-beam and passing-beam headlamps, direction-indicator lamps, stop lamps, position lamps, retro-reflectors, and other light-signalling devices. It specifies position requirements (height, width, length), geometric visibility angles, colour requirements, and electrical interconnection rules. Transitional provisions address implementation across different amendment series, with staggered acceptance periods for type-approvals granted under preceding series of amendments. |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 24 Apr 26 |
| Relevant to: UN Regulation No. 86 | Installation of Lighting and Lighting-Signalling Equipment on Tractors and WP.29 Regulatory Project | Simplification of Lighting Regulations |
| Click here to view the full document file |
| UN R86: Highlights of the baseline amendments to 04 series of amendments |
| Reference Number: GRE-94-39 |
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UN R86 baseline amendments add agricultural non-road mobile machinery to scope. Definitions are simplified by removing common vehicle definitions and aligning structure with UN R48. Headlamps symmetrical classes are reviewed following CLEPA comment. Side retro-reflector requirements align with EU requirements on location. Direction-indicator lamps alignment with EU scope for tractors remains an open point. |
| Meeting Sessions: 94th GRE session (27-30 Apr) |
| Document date: 24 Apr 26 |
| Relevant to: UN Regulation No. 86 | Installation of Lighting and Lighting-Signalling Equipment on Tractors and WP.29 Regulatory Project | Simplification of Lighting Regulations |
| Click here to view the full document file |