The GRE Informal Working Group on Simplification of UN Lighting and Light-Signalling Regulations held its 73rd session in Brussels on 9-11 July 2025. SLR approved reports from the 70th and 71st sessions. The Homework Team R-150 will prepare an updated version of SLR-73-09 including a decision tree and justification for submission to GRE-93 or GRE-94. SLR experts will study the GTB draft proposal in SLR-73-04 (superseded by SLR-73-04/Rev.1) to simplify paragraphs 6.×.4. and 6.×.5. in Reg. 48. SLR-73-07/Rev.1 reflects the latest baseline document for Reg. 48 with agreed modifications. IMMA introduced baseline documents for Reg. 53 and Reg. 74 reflecting simplified definitions. CEMA will prepare a baseline document for Reg. 86. GTB will prepare an updated proposal for a CAD-based method to determine apparent surface for SLR-74. A special SLR session on apparent surface may be held on 10 September 2025 if equipment is available. Discussion continues on harmonisation of requirements, improving direction indicator visibility, and technological neutrality for light sources. The 74th SLR meeting is scheduled for 10-12 September 2025 in Brussels.

The 74th SLR meeting (Brussels, 10–12 September 2025) reviewed baseline documents for Regulations 48, 53, 74, and 86, with participants improving draft texts on simplified paragraph structures and definitions. Key topics included correction of errors in Regulation 150 (formal proposal for GRE-94 April 2026), apparent surface simplification with support for Alternative A and luminance method consideration, improved visibility of daytime running lights (OICA drafting proposal for December session), and harmonisation of requirements regarding prohibited if not allowed (seeking GRE feedback). Technological neutrality for light sources was deferred to informal discussions. The 75th meeting is scheduled for 10–12 December 2025 in Brussels.

The GRE Informal Working Group on Simplification of UN Lighting and Light-Signalling Regulations held its 75th session in Brussels, 10–12 December 2025. SLR reviewed and improved revised baseline documents for Regulations 48, 53, 74, and 86, reflected in SLR-75-10/Rev.1, SLR-75-16/Rev.1, SLR-75-17, and SLR-75-21 respectively. SLR endorsed corrections to Regulation 150-01 in SLR-75-02/Rev.1 and simplified paragraphs 6.×.4. and 6.×.5. in Regulation 48 per SLR-75-05/Rev.1 (superseded by SLR-75-05/Rev.2), with continued discussion at SLR-76. SLR tasked GTB to complete work on apparent surface definition and CAD method. SLR agreed the 76th meeting will be held 4–6 February 2026 in Brussels.

The 8th session of the GRE Task Force on Glare Prevention (9 June 2026, Brussels) approved the previous meeting’s report and received feedback on GRE-94. The Task Force discussed headlamp cleaning requirements, the 2000 lm light output limit, horizontal aiming for passing-beam orientation, and periodic technical inspection compatibility with Regulation No. 48. The GTB Task Force will submit an update at the 9th session targeting ranking of proposed glare-prevention solutions. The Task Force will next address glare from light signalling devices and then work on countermeasures. The 9th meeting is scheduled for Tokyo on 8 September 2026, and the 10th meeting for Brussels in December 2026.

This document is a baseline for UN Regulation 48 (Stage 2/Step 2) concerning vehicle lighting and light-signalling devices. It incorporates all amendments from multiple series and includes provisions for adaptive front-lighting systems (AFS), driver assistance projections, reversing projections, direction-indicator projections, and automated driving system (ADS) features. The regulation establishes requirements for the design, installation, and operation of lighting devices on vehicles of categories M, N, and O, with comprehensive specifications for individual lamp types, geometric visibility angles, electrical connections, and tell-tale requirements. It includes transitional provisions allowing approvals under preceding series while establishing phased implementation timelines for new requirements.

This baseline draft for UN R48 (10 series of amendments) establishes uniform provisions for vehicle lighting and light-signalling device installation. The document reflects all modifications agreed at GRE-94 and incorporates an updated proposal from IEC regarding technological neutrality for LS devices. Key additions include provisions for work lamps to be included after formal WP.29 adoption in June 2026, updated tables for positioning and geometric visibility angles (Annexes 18–19), and revised terminology replacing “dipped-beam/main-beam” with “passing-beam/driving-beam” throughout. Open points address apparent surface visibility against stop lamps and consistency with IWVTA transitional provisions, with transitional provisions for the 10 series specifying acceptance dates and phase-in periods to be finalized.

Based on SLR-73-07/Rev.1 including LUPC-01-03, this consolidated and amended text of UN R48 defines uniform provisions for vehicle lighting and light-signalling device installation. The regulation establishes requirements for vehicles of categories M₁–M₃, N₁–N₃, and O₁–O₄ regarding lamp presence, positioning, geometric visibility, orientation, electrical connections, and tell-tales. Key additions include energy status indicators providing charge status information via white, amber, red, selective-yellow, indicator blue, or indicator green light; lamp test mode enabling user-performed visual function checks of lighting systems; and enhanced driver assistance projections. Transitional provisions establish type-approval acceptance deadlines with mandatory application dates from September 2027 for M and N₁–O₂ vehicles and September 2028 for N₂–O₄ vehicles.

The document addresses simplification of the definition of “apparent surface” and single lamp distance requirements in UN R48. It presents a new CAD-based concept defining apparent surface using light emitting surface with clear outer lens disregarded. The document notes that current regulation allows multiple ways to define apparent surface resulting in different distances, with existing approvals having distances significantly larger than 75mm between distinct parts without known safety issues. GTB agrees on simplifying the apparent surface definition to describe function contours as seen by road users, while acknowledging this should not restrict possible designs. The document references a 1999 INF Milano study concluding symmetric appearance is relevant for vehicle identification and larger distances are acceptable for symmetric compared to asymmetric constellations.

The agenda includes review of Terms of Reference and Rules of Procedure, a recap of the GRE 94th session, discussion of questionnaires, a proposal for modification of UN R48, follow-up on action items, review of existing Regulations and Standards, and announcement of the next meeting.

OICA opposes introducing a regulatory requirement for horizontal adjustment of passing-beam/driving-beam and for AFS/ADB to the current SLR agenda. The proposal does not contribute to simplification of lighting regulations, no identified safety concern or ambiguity justifies this requirement, and it lacks a formal proposal from a Contracting Party, NGO, or other stakeholder. The SLR group is managing several longstanding unresolved issues, and introducing this topic risks further delaying progress. Harmonized requirements require comprehensive understanding of Periodic Technical Inspection specifications across all Contracting Parties, which are currently unavailable.

Annex 6 specifies methods for measuring variations in motor vehicle passing-beam inclination caused by changes in vehicle attitude due to loading. Para. 4 establishes vehicle preparation requirements: vehicles shall have travelled between 1,000 km and 10,000 km; tyres shall be inflated to full-load pressure with full fuel replenishment; parking brake released and gearbox in neutral; conditioning for at least 8 h at specified temperature; and headlamps with well-defined passing-beam cutoff should preferably be installed. Comments on para. 4 question compatibility with periodic technical inspection (PTI) requirements.

The session discussions addressed the Energy Status Indicator, including modifications to paragraph 2.5.22. defining illumination to assist socket connection, revisions to paragraph 6.29.9. establishing maximum flashing frequency of 5 Hz, and paragraph 6.29.9.5. setting surface size limits up to 150 cm² around sockets. Colour convention for charging status indicators was debated, with proposals for blue (charging), green (charged), orange (failure), and red (danger), to be discussed at the April GRE session. The Lamp Test Mode section addressed concerns regarding testing scope and removed requirements for AFS testing and driving beam testing.

This document presents the draft agenda for the 8th meeting of the GRE Task Force on Glare Prevention, scheduled for 9 June 2026 at CLEPA Headquarters in Brussels. The agenda includes welcome remarks, adoption of the agenda, approval of the previous meeting report, feedback from GRE-94, and status updates on HWT on PTI, ADB/AFS, and Regulation 48. Discussion topics cover horizontal adjustment of passing- and driving-beam and AFS-ADB, vehicle preparation for passing-beam measurement, and updates from the GTB Task Force Glare Control. Future meetings are scheduled for Tokyo in September 2026 and Brussels in December 2026.

OICA proposes amendments to LUPC-09-04: amend para. 2.5.22. to expand the definition of energy status indicator to include information on the operational status of energy transfer and illumination to assist in locating electrical connection; delete existing para. 3.2.10. and its subparagraphs; add new paras. 3.2.10. and 3.2.11. requiring statements on energy status indicator lamps and lamp test mode; and amend para. 6.29.9. to clarify that multiple energy status indicators may be installed, change the flashing frequency limit from 2.0 Hz to 5.0 Hz, and enlarge the maximum apparent surface area to accommodate various plug sizes and surrounding illumination designs.

Proposal to amend para. 1., footnote 1 to update the reference to the Consolidated Resolution on the Construction of Vehicles (R.E.3.); add new para. 2.3.3.7. defining devices for Automated Driving Systems; amend para. 2.3.8. to clarify the definition of movable components; delete paras. 2.3.12. to 2.3.12.4. concerning terms and definitions related to automated driving; amend paras. 2.5.3., 2.7.4.7., and 2.7.6.1. to 2.7.6.4. to incorporate automated driving system references; insert new paras. 2.5.22., 2.7.12., 2.7.13., 3.2.10., 3.2.11., and 5.35.14. relating to direction indicator projections and driver assistance projections; insert new paras. 5.37. and 5.38. establishing general provisions and special requirements for vehicles equipped with an Automated Driving System; amend paras. 6.1.1., 6.1.4.3., 6.1.7.2., 6.1.7.3., 6.1.8.1., 6.2.4.3., 6.2.6.1.1., 6.2.6.2.2., 6.2.7.6., 6.2.7.7., 6.3.4.3., 6.3.6.1.1.1., 6.3.6.1.2.2., 6.3.9., 6.4.7.2., 6.5.7., 6.6.7.1., 6.7.9.2.1., 6.13.4.2., 6.19.4.3., 6.19.7.2.©, 6.20.7.2., 6.22.4.2., 6.22.6.1.1., 6.22.7.4., 6.22.7.5., 6.22.8.3., 6.22.8.4., and 6.26.7. to address automated driving system operation and direction indicator projections; insert new para. 6.29. with comprehensive requirements for direction indicator projections; insert new items 9.33. and 9.34. in Annex 1 regarding direction indicator projections and automated driving systems; amend Annex 5, para. 2. and paras. 2.1. to 2.4. to define seating position 1 and modify loading conditions for automated vehicles; amend Annex 14 title; and insert new Annex 18 specifying the chevron as the basic element for direction indicator projection patterns, based on ECE/TRANS/WP.29/GRE/2024/21/Rev.1, ECE/TRANS/WP.29/GRE/2025/23, and GRE-93-30-Rev.1.

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

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