In paragraph 3.1. of Annex 4, Part 1 the position of the photometer head, the reference axis and the directions are clearly described. If the surface reflection is on the opposite side of the source from the photometer head, which is given at an angle of (β1 = -5°), the surface reflection has no influence on the measurement. This is true for the measurement of RI values as well as for colour measurement.
The proposed solution is based on an existing description in UN Regulation No. 27 (namely paragraph 2.6. of Annex 6) concerning the procedure to follow in case of a surface reflection for both colour measurement and CIL measurement.

This proposal aims to remove the list of classes and to refer, in general, only to passing-beams and driving-beams.

Proposes to amend paragraph 3.3.3.3. of UN Regulation No. 37 to reflect the latest edition of IEC Publication 60809, Edition 4

Proposal to make an editorial correction to the requirements to light emitting diode (LED) light sources.

Proposal to improve the definition of photometric stability.

Proposal to remove the failure mode and light source failure detection requirements for the cornering lamp.

Proposal to clarify usage of daytime running lamps (DRL) with other lamps.

Proposal to extend to AFS passing-beam headlamps the possibility to project driver assistance symbols and patterns if the pertinent requirements of UN R149 are fulfilled.

30. The expert from GTB introduced a concept to improve the failure provisions in the 01 series of amendments to UN Regulation No. 149, including “high definition” headlamps (GRE-88-10). The experts from Germany and the United Kingdom made preliminary comments on the proposal and pointed out the need to study it further. The Chair invited GRE experts to send their inputs to GTB.

Proposal to extend to AFS passing-beam headlamps the possibility to project driver assistance symbols and patterns

24. The expert from GTB introduced a proposal that allows a road projection pattern for predicted trajectory (ECE/TRANS/WP.29/GRE/2023/7). The expert from France proposed modifying the speed limit, in conjunction with ECE/TRANS/WP.29/GRE/2023/8 (see the next paragraph). The expert from Japan sought a proof that this pattern would not negatively affect other road users. The Chair invited GTB to liaise with Japan on this matter.

25. The expert from GTB proposed amendments that extend the possibility to project driver assistance symbols and patterns to the passing-beam headlamps of adaptive front-lighting systems (AFS). These amendments were accompanied by a corresponding amendment to UN Regulation No. 149 (ECE/TRANS/WP.29/GRE/2023/8 and GRE-88-25-Rev.1). GRE adopted the proposals, as laid down in GRE-88-25-Rev.1, and requested the secretariat to submit them for consideration and vote at the November 2023 sessions of WP.29 and AC.1 as draft Supplement 2 to the 01 series of amendments to UN Regulation No. 149, part of draft Supplement 19 to the 06 series of amendments, part of draft Supplement 6 to the 07 series of amendments and part of draft Supplement 4 to the 08 series of amendments to UN Regulation No. 48.

Proposal to allow the projection of a pattern for predicted trajectory.

24. The expert from GTB introduced a proposal that allows a road projection pattern for predicted trajectory (ECE/TRANS/WP.29/GRE/2023/7). The expert from France proposed modifying the speed limit, in conjunction with ECE/TRANS/WP.29/GRE/2023/8 (see the next paragraph). The expert from Japan sought a proof that this pattern would not negatively affect other road users. The Chair invited GTB to liaise with Japan on this matter.

25. The expert from GTB proposed amendments that extend the possibility to project driver assistance symbols and patterns to the passing-beam headlamps of adaptive front-lighting systems (AFS). These amendments were accompanied by a corresponding amendment to UN Regulation No. 149 (ECE/TRANS/WP.29/GRE/2023/8 and GRE-88-25-Rev.1). GRE adopted the proposals, as laid down in GRE-88-25-Rev.1, and requested the secretariat to submit them for consideration and vote at the November 2023 sessions of WP.29 and AC.1 as draft Supplement 2 to the 01 series of amendments to UN Regulation No. 149, part of draft Supplement 19 to the 06 series of amendments, part of draft Supplement 6 to the 07 series of amendments and part of draft Supplement 4 to the 08 series of amendments to UN Regulation No. 48.

Proposal to extend to AFS passing-beam headlamps the possibility to project driver assistance symbols and patterns.

21. The expert from GTB tabled a proposal for amendments to UN Regulations Nos. 48 and 149 that extended the possibility of projecting driver assistance symbols and patterns to passing-beam headlamps of adaptive front-lighting systems (AFS) (ECE/TRANS/WP.29/GRE/2022/21, as amended by GRE-87-30). GRE agreed to modify the beginning of paragraph 5.35.3. to read “Neither flashing nor transforming of …”. In view of some comments and reservations about the possible distraction of other road users in urban traffic, GRE agreed to revert to this proposal at the next session, based on a revised document to be prepared by the authors.

39. The expert from GTB briefly presented their recommended practice and software for the Headlamp Safety Performance Rating that were publicly available (GRE-87-19).

37. GRE welcomed the live demonstrations of “Driver Assistance Projections”, organized by GTB in conjunction with the GRE session (GRE-87-06), and noted new useful projection patterns.