Proposal to amend UN R150-01 addressing three main issues. First, since the GRE-adopted proposal to delete the unique identifier (GRE-92-18) was not part of the March 2026 WP.29 submission, the regulation text requires amendment in the interim, though this may become unnecessary if merged with GRE-92-18. Second, the approval marking approach is aligned with UN R148 by including one example in the body text and referencing other arrangements in Annex 10, allowing deletion of the Table 1 reference and redundant ratio explanations from Figure A10-I. Third, the outdated requirement for function symbols to be placed diametrically opposite the approval number — inherited from UN R3 and R7 but already removed in UN R148 — is deleted from Annex 10, along with a clarifying amendment to the note below Figure A10-I to prevent inconsistent interpretations among technical services. Further details can be found in informal document GRE-94-11.

Proposal to align the Exterior Courtesy Lamps provisions of the 08 series amendments with those of the 09 series.

Proposal to correct inconsistencies and calculation errors in Conformity of Production (CoP) tables across both series of UN R149, which may otherwise cause confusion for manufacturers and technical services.

In UN R149-00, corrections include: deletion of erroneous maximum values at point 50L in CoP tables for Classes C, V and W Bend Light; correction of miscalculated 20% and 30% CoP minimum values for Classes C and V Bend Light Category 1; correction of the Class W non-bending mode maximum value at Segment 10 and its derived CoP values; and correction of rounding errors in Class R CoP minimum values.

In UN R149-01, corrections include: updating the Class W Bend Light CoP maximum at point BR to align with the type-approval table; correcting miscalculated Class R Bend Lighting CoP values; and fixing table note references in Annex 4 following the introduction of scientific notation in the 01 series.

Further details can be found in informal document GRE-94-10.

Proposal to exclude retro-reflective devices and markings from the requirement of “Red light to the front” and “White light to the rear”.

Proposal to clarify and modernize lamp installation and component requirements in UN R48 and UN R148 to address the growing variety of vehicle and lamp designs, particularly band/strip lamps extending across the full width of the vehicle. Key changes include: removing the “band/strip” terminology and expanding the definition of a pair of lamps to cover full-width designs; removing the three-device maximum for Y-lamps to ensure technology neutrality; adding a new paragraph §5.5.5 defining a pair as a two-lamp system; relocating light source requirements from UN R48 to UN R148 §4.7.3 to ensure at least one light source per side; removing the 0.8-metre minimum length requirement; and clarifying that definitions in §2.4.10 apply only to the relevant vehicle categories. Minor amendments to UN R148 include updated provisions for light source positioning, clarification of §4.8.1.3, and new sampling provisions in §4.8.11 for testing band/strip lamps. Further details can be found in informal document GRE-94-03.

Proposal to clarify the 80% failure criterion for Conformity of Production (CoP) checks by confirming that CoP tables represent a simplified subset of the full Class C type-approval measurement points, and to exclude overhead requirements (items S50 and S100 in Tables 6 and 7) from the passing beam failure detection criterion, as these may be fulfilled by position lamps. Further details can be found in informal document GRE-94-08.

Proposal to improve the clarity and structure of Conformity of Production (CoP) requirements for driving beams in UN R149 by following the approach used in UN R123.

Proposal to introduce selective yellow as an permitted alternative to white for front position lamps and daytime running lamps in UN R48 and UN R148. Studies confirm that selective yellow performs equally to white for oncoming vehicle recognition and speed estimation. Unlike historical filament lamp applications where a yellow filter reduced luminous intensity, modern LEDs achieve the same intensity levels without reduction. Specific amendments include: updating §5.15 to reflect selective yellow options and removing a duplicated front fog lamp requirement; amending §§6.9.7 and 6.19.7 to deactivate selective yellow position and daytime running lamps on the relevant side during direction indicator activation; and aligning UN R148 (01 series) by amending §§5.1.7, 5.4.7 and Annex 1 accordingly. The colour boundaries for selective yellow are already defined in §2.11.1.2 and require no amendment. Further details can be found in informal document GRE-94-05.

Proposal to introduce new LED light source categories L2 and L3 in R.E.5. Further details can be found in informal document GRE-94-12.

The GTB Glare Task Force defined countermeasures for critical glare types, categorizing them as Regulation, Technology, Individual, or Workshop measures. Proposed solutions address specific glare sources including climbing roads, left bends, high beam misuse, and vehicle acceleration. Countermeasures range from short-term driver education to long-term mandatory technologies. Future work includes quantifying effectiveness and addressing less critical glare events.

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.

GTB proposes simplifying UN R48 by developing a single CAD-based method to determine apparent surface at early design stages. The proposal deletes the “light-emitting surface” definition and establishes “apparent surface” as the orthogonal projection of visible light-emitting surfaces in a specified observation direction. Amendments include revised definitions for lens, textured outer lens, illuminating surface, and apparent surface, with modified requirements for single lamps with multiple distinct parts. Distance requirements between adjacent parts are adjusted to 75mm or 200mm depending on lamp type.

UN R48 baseline text for a 10 series of amendments proposes uniform provisions for vehicle lighting and light-signalling device installation approval. The document consolidates modifications agreed at working group session through dated amendment documents and resolutions. Pending issues include determining “[any] subsequent series” terminology for frozen regulations, renumbering and cross-checking paragraphs, addressing apparent surface visibility, improving daytime running lamp visibility against stop lamps, resolving “prohibited if not allowed” language, and numbering all figures with titles. Editorial polishing includes standardizing hyphenated terminology (“driving-beam,” “passing-beam,” “retro-reflector,” “direction-indicator lamp”), applying consistent UN Regulation references, replacing “communication sheet” with “communication form,” assigning table and figure numbers consistent with similar regulations, and correcting percentage notation to “per cent.”

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

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.

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.

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.