20. The representative of Germany presented GRVA-20-04, proposing a supplement to the 01 series of amendments to UN Regulation No. 157 aimed at addressing the content of the footnote in paragraph 5.2.6.5.1 that GRVA agreed to revisit at this session. He proposed that lane changes for heavy vehicles be authorized in a target lane for which the speed limit was identified.
21. The representative of the United Kingdom of Great Britain and Northern Ireland recalled to GRVA that he conducted a survey with the Contracting Parties within the Special Interest Group for UN Regulation No. 157 and that there was a consensus on removing the footnote. He mentioned that only Germany proposed a substitute.
22. The representative of OICA inquired whether more flexibility could be accepted in situations where the system identified that a lane change was uncritical.
23. The representative of the Netherlands inquired about the justification for removing the footnote. He stated that the German proposal was a sensible way forward in case the footnote would be deleted.
24. The representative of Japan could agree to the proposal. He suggested finding a more general text.
25. The representative of Sweden identified situations that could be dangerous also in cases where the speed limit can be identified, e.g., when the ego vehicle has a very slow speed.
26. GRVA agreed to continue this discussion and requested the secretariat to distribute GRVA-20-04 with an official symbol at its January 2025 session.
27. GRVA considered GRVA-20-42 (superseding ECE/TRANS/WP.29/GRVA/2024/30 and ECE/TRANS/WP.29/GRVA/2024/40) at the same time as GRVA-20-43 under agenda item 6(b). GRVA requested the secretariat to distribute GRVA-20-42 with an official symbol at the January 2025 session.

64. The representative of the United Kingdom of Great Britain and Northern Ireland introduced ECE/TRANS/WP.29/GRVA/2024/33 as amended by GRVA-20-29 aimed at aligning the conditions for automatic reinstatement of the system at the “initiation of each engine start/run cycle” with the provisions contained in other UN Regulations. He produced GRVA-20-43 and Rev.1 to address the comments received.
65. GRVA adopted ECE/TRANS/WP.29/GRVA/2024/33 as amended by
Annex III and requested the secretariat to submit it as a draft supplement to the original version of UN Regulation No. 171 (DCAS).

76. GRVA considered ECE/TRANS/WP.29/GRVA/2024/36 and GRVA-20-44 (superseding ECE/TRANS/WP.29/GRVA/2024/34 and ECE/TRANS/WP.29/GRVA/2024/35) at the same time as GRVA-20-43 under agenda item 6(b). GRVA requested the secretariat to distribute GRVA-20-44 with an official symbol at the January 2025 session.

54. The representative of the Russian Federation, Chair of the Task Force on ADAS, presented the status report (GRVA-24-16), listing the activities performed by the task force since the twenty-third GRVA session, as mandated at the twentieth GRVA session (see GRVA-20-21/Add.1). He detailed the activities conducted under Phase 3 of the development of UN Regulation No. 171 and the production of the draft 02 series of amendments to UN Regulation No. 171 (DCAS). The representative of China inquired about the frequent amendments to that regulation and asked whether there was evidence demonstrating that the earlier series provided sufficient safety. He noted that China was closely monitoring this regulation while developing its corresponding national standard and asked whether any evaluations, surveys, or feedback loops on safety had been carried out prior to adopting the amendments. The representative of Norway raised a similar question. The Task Force Chair explained that the work of the task force had been organized in phases, and that each phase leading to a new series of amendments introduced additional use cases in the regulation and were not intended to address safety deficiencies of previous versions. The GRVA Chair recalled that the expectation for this regulation, like any other under the GRVA purview, was that it improves safety. He mentioned that GRVA would welcome safety-related data from all delegations.

55. GRVA reviewed the proposal (ECE/TRANS/WP.29/GRVA/2026/4, as amended by GRVA-24-17) for the 02 series of amendments to UN Regulation No. 171 (DCAS) and comments provided by the delegations, including GRVA-24-41/Rev.1.

56. The Task Force Chair also presented provisions from the draft 02 series of amendments to UN Regulation No. 171 with relevance for the 01 series (GRVA-24-18) as well as proposed supplements to the original version of UN Regulation No. 171 and its 01 series of amendments. He provided spitted versions (i.e. GRVA-24-18-A, GRVA-24-18-B, GRVA-24-19-A, and GRVA-24-18-B, specific for each relevant series). He consolidated all amendments received in GRVA-24/17/Rev.1. GRVA agreed to resume consideration of GRVA-24-18 (A and B) and requested the secretariat to distribute GRVA-24-19 (A and B) with an official symbol at the twenty-fifth session. GRVA also agreed to discuss the future of the task force. The representative of Norway stated his reservations with the draft proposal. He welcomed the enhancements proposed to the Driver Monitoring System (DMS) provisions but noted that the extensions given to hands off situations and system-initiated manoeuvres may make DCAS too close to ADS.

57. GRVA adopted ECE/TRANS/WP.29/GRVA/2026/4, as amended by GRVA-24-17/Rev.2, as draft 02 series of amendments to UN Regulation No. 171 and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their June 2026 sessions.