GRE held its ninety-fourth session from 27 to 30 April 2026 in Geneva. The Working Party adopted proposals for amendments to UN Regulations on lighting and light-signalling devices, including proposals to UN Regulation No. 148 and No. 149 as draft Supplement 8 to the 01 series, and to UN Regulation No. 10 as draft Supplement 3 to the 07 series, mandating the secretariat to submit these to the June 2026 and November 2026 sessions of WP.29 and AC.1 as appropriate. GRE agreed to continue consideration of several proposals at its next session, including those on call for help signals, manufacturer logos in lighting devices, pair of lamps clarification, retro-reflective device colour requirements, selective yellow for front lamps, supplemental light-signalling devices, and direction indicator projections, noting concerns from vulnerable road users representatives. GRE extended the mandate of the Informal Working Group on Electromagnetic Compatibility until December 2028 and decided to continue technical discussions on automated driving system marker lamps. The next session is scheduled for 20 to 23 October 2026, with a working document submission deadline of 27 July 2026.

Proposal to:

• Amend Table 18 to delete maximum values at point 50L and correct minimum values at point 50L to 1,360 cd (20% CoP) and 1,190 cd (30% CoP) and delete the associated note,
• amend Table 21 to delete maximum values at point 50L and correct minimum values at point 50L to 1,360 cd (20% CoP) and 1,190 cd (30% CoP) and delete the associated note,
• amend Table 23 to correct maximum values at Segment 10 to 7,100 cd (0% CoP), 8,520 cd (20% CoP), and 9,230 cd (30% CoP),
• amend Tables 30 and 31 to correct minimum values at point HV to 25,920 cd (20% CoP) and 22,680 cd (30% CoP),
• amend Table 24 to delete the associated note regarding multiplication by 1.4,
• amend Table 28 to correct point BR maximum values to 2.65×10³ cd (0% CoP), 3.18×10³ cd (20% CoP), and 3.45×10³ cd (30% CoP),
• amend Table 29 to correct point BR maximum values to 2.65×10³ cd (0% CoP), 3.18×10³ cd (20% CoP), and 3.45×10³ cd (30% CoP),
• amend Table 35 to correct CoP minimum values at point 2U-V to 1.04×10⁴ cd (20% CoP) and 9.10×10² cd (30% CoP) and at points H-9L and H-9R to 2.16×10³ cd (20% CoP) and 1.89×10³ cd (30% CoP),
• amend Annex 4, para. 1.6.2.1. to correct references to table notes from notes 1 and 7 to notes a and f of Table 7.

The document introduces a supplemental light-signaling devices concept for multiple lamp systems. A master lamp meeting all requirements may be accompanied by one or more supplemental devices without photometric requirements for the supplemental devices. An IM reference number limits the sum of all devices mounted on a vehicle to below 100. Supplemental devices require separate marking. Color, switching, failure, and installation requirements apply to all devices of a function together. The approach permits combining devices from different manufacturers with individual type approvals.

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.

FIA proposes that vehicles in automated mode in mixed traffic should be marked with one light visible from all sides. Marker lights should have uniform colour and shape clearly distinguished from other signal lights, be positioned at sufficient distance from signal lights and headlamps to avoid impairing visibility, and be designed to not glare other road users.

The European Cyclists Federation and International Federation of Pedestrians withhold support for Direction Indicator Projection (DIP) technology regulation. They contend available studies lack evidence of reduced conflicts or crashes in real-world conditions, raise concerns about behavioral adaptations that may redistribute rather than reduce risk, and note the technology does not address responsibility allocation where cyclists and pedestrians already have legal priority. Additional concerns include reliance on uncontrolled road surfaces affecting signal visibility and clarity, and risks of shifting safety burden onto vulnerable road users contrary to Safe System principles. They urge contracting parties to refrain from regulation pending robust research confirming the technology neither undermines priority rules nor introduces unintended behavioral risks.

The Task Force on Substitutes/Retrofits reports progress on LED substitutes and retrofits. Actions completed include Step 1 on LED Substitutes and Step 2 on LED Replacements covering administrative and technical items. The Front Fog cluster H8, H16, HB4 was approved by WP29 in March 2026 and entered into force. Current focus is the High Beam cluster HB3, HIR2, H9 and H10, with technical discussions ongoing in GTB WGLS and H10 LEDr draft category sheet submitted. Market surveillance requires improvement across control points from manufacturer to road-side enforcement.

Category H10 sheet defines LED light source H10_LEDr dimensions, electrical and photometric characteristics, and measurement requirements. The LED light source shall not exceed the envelope indicated in Figure 2 and shall function in either voltage polarity. Essential characteristics include rated 12 volts, 21 watts, luminous flux 850 lm ± 15%, cap temperature maximum 100°C, and electrical current 1500 mA minimum at 12–14 V DC. The document specifies screen projection requirements using box systems, contrast requirements, and normalized luminous intensity distribution measurements in C-planes per CIE Publication 70-1987.

Identifies challenges with headlamp aiming across approval and inspection processes. Issues include determining vehicle actual load and cut-off line definition for up-down aiming, defining vehicle references and kink point location for left-right aiming, and separating aiming control from beam pattern assessment. Inspection data show rejection rates of 4.8 per cent for light duty vehicles and 2.8 per cent for heavy duty vehicles in France, with front fog lamp misalignment at 46 per cent. The document recommends reviewing approval criteria for passing-beam orientation and defining inspection procedures, equipment, and multibeam headlamp considerations.

The Task Force on Glare Prevention, Homework teams examined literature (TFGP-06-02), Periodical Technical Inspections (TFGP-07-02), ADB/AFS Regulation 48 (TFGP-07-03), and contributions from GTB (TFGP-07-04, TFGP-07-05) and CITA (TFGP-05-02, TFGP-07-07). The Task Force is preparing draft recommendations on the first step regarding retroreflective identification devices and draft countermeasures, with further recommendations on second-step glare from light signalling devices and DRL planned for October 2026.

TF GP gives a list of items for consideration by GRE

This status report from GRE TF AVSR discusses development of a Hybrid Regulation on ADS Marker Lamps for power-driven vehicles. The TF addresses colour specifications aligned with SAE J3134 and ECE R65 standards. Key open questions for GRE guidance include: whether pulsating luminous intensity patterns should be permitted; potential conflict with the 1968 Vienna Convention on Road Traffic; application to platooning trucks and agricultural vehicles; inclusion of L₆ and L₇ categories; mandatory versus optional rear installation; variable luminous intensity based on environmental conditions; side marker lamp integration possibilities; and reciprocal incorporation with other lamps.

Proposal to amend paragraph 5.2.3.3 to clarify that samples shall be subjected to the heat resistance test described in Part 1 of Annex 6, prior to the tests described in Parts 1 and 2 of Annex 6 paragraphs 5.2.5 and 5.2.6. Proposal to amend paragraph 5.1.7 to correct the reference in Tables 4 and 5 from Part 4 to Part 5 of Annex 6 for the Rear face test. Proposal to amend Annex 5, paragraph 8.1.4 to correct the cross-reference from paragraph 5.9.4.2.1 to paragraph 5.3.4.2.1.

Proposal to add work lamp definitions and requirements to UN R48, minimum height of 250 mm above ground, downward orientation, and automatic deactivation within 1 second if vehicle speed exceeds 15 km/h. Work lamps require independent manual controls and a mandatory visual operating tell-tale. Annex 1 adds item 9.32. for work lamp approval documentation.

TF LUPC proposal based on UN R48 consolidate version from SLR-73-07/Rev.1 including LUPC-01-03. Adds new annex for Technical Provisions for Energy Status Indicator

Proposal for a supplement to the 06/07/08/09 series of amendments to UN Regulation No. 48 and the 02 series of amendments to UN Regulation No. 148 concerning manufacturer logos in side-marker lamps. The proposal amends paragraph 5.5.5. of UN R48 to clarify that no restrictions apply to logos in side-marker lamps, and amends paragraph 4.5.5. of UN R148 to add side-marker lamps to the list of lamps that shall not incorporate a logo. The justification references ECE/TRANS/WP.29/GRE/2020/5/Rev.2.

Proposal to amend multiple paragraphs in UN R53. Changes include: paragraph 5.3. to add tolerance specifications and manufacturer fitting requirements; paragraphs 5.6.2.1., 5.6.2.2., and 5.6.2.3. to reference UN Regulation No. 48; paragraph 5.8.1. to clarify direction indicator lamp photometric characteristics; paragraph 5.19.2. regarding dual lamp assemblies marked “D”; paragraph 6.1.7.2. for HIAS failure tell-tale specifications; paragraphs 6.2.4., 6.3.3.1., 6.10.4., and 6.11.4. to define geometric visibility angles; paragraph 6.9.3. for circuit-closed tell-tale requirements; Annex 1 paragraphs 9 to 10

Proposal to correct mistakes found in the current 04 series of amendments and align with UN R48, with appropriate adaptation of L category vehicles.

The GRE-IWG SLR is simplifying UN Lighting and Light-signalling Regulations through a two-stage process. Baseline documents for UN Regulations 48, 53, 74, and 86 have been prepared as carriers of technical amendments. Stage 2 work addresses improved visibility of rear direction indicators against stop lamps, apparent surface definitions, and correction of errors in UN Regulation 150.

Baseline document for stage 2 of UN Regulation No. 48, based on R48-09 (R48-08 up to Supplement 04 and WP.29/2024/28, WP.29/2025/36, with modifications agreed at GRE-92 and GRE-93

Proposal to amends requirements for LED light source modules and non-replaceable light sources. Amendments specify headlamp and AFS technical specifications including light source module characteristics, electrical interfaces, and photometric values. Requirements for LED light source modules and non-replaceable light sources address design, manufacture, testing conditions, colour rendering, UV-radiation, and objective luminous flux measurement procedures.

UN R53 series ⁰⁵ baseline amendments simplify the definition in paragraph 2 by deleting common definitions to UN R48, reducing from 49 original definitions to 27. Amendments align failure provision and EV inclusion with UN R48. The communication sheet is amended to align with UN R48. Terminology and format alignment with UN R48 and UN R74 is applied. Previous technical prescriptions are moved to a reference document, keeping only the latest. Paragraphs 6.×.4 and 6.×.5 are simplified, aligning with UN R48. An open point questions whether Annex 1 Communication form should refer to a specific Series of Amendments to R48 definitions.

This amendment modifies definitions in paragraph 2, consolidates general specifications in paragraphs 5 and 6, simplifies failure provisions, includes electric vehicles, aligns terminology with UN R48 baseline and standardizes vehicle category references to “vehicles of category(ies),” corrects AFS provision references, applies scientific notation with lumens, aligns approval number text with UN R48, corrects signal lamp category numbering, uses category symbols instead

Proposal to amend UN R74 series 04 by simplifying the definition in paragraph 2 through deletion of common definitions to UN R48, applying amendments for failure provision and EV inclusion, aligning terminology and format with UN R48 and UN R53, retaining only the latest transitional provisions, simplifying paragraphs 6.×.4 and 6.×.5, and providing editable pictures.

Proposal to amend the definitions ; add EV inclusion; clarify individual and general provisions, failure provisions, and transitional provisions; correct signal lamp category; use category symbol instead of lamp function name;

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.

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.

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.

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

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

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.

Proposal provides an alternative proposal to GRE/2024/12 Revision 2 as amended by GRE-93-28 Revision 1 .

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.

Presents the SAE J3134 review of Automated Driving System (ADS) Marker Lamp Requirements

Presentation on visualisation of signals for help

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