62. The Chair of the TF on ADAS presented (GRVA-20-21) the report on the activities of the group since the last GRVA session. He provided general information about the Driver-Control Assistance System (DCAS) operation, he recalled the DCAS regulatory concept, he presented the draft amendments to UN Regulation No. 171 submitted by the task force for consideration at this session, and he sought guidance from GRVA on open items.

63. The representative of FIA supported UN Regulation No. 171 (DCAS) in its original form but expressed concerns with the proposed 01 series of amendments. He pointed out a potential discrepancy in the presentation regarding the need for trainings: slide 15 mentioned that there is no need to train the driver to become a DCAS supervisor, while slide 20 mentioned that in general, drivers shall be educated and trained to operate vehicles equipped with DCAS. The Chair of the TF on ADAS explained that the latter was general about minimizing drivers’ complacency and overreliance. He agreed to clarify the presentation. The representative of CLEPA explained that the Human-Machine Interface requirements in UN Regulation No. 171 were the reason why no general training on DCAS was needed.

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).

66. GRVA reviewed ECE/TRANS/WP.29/GRVA/2024/32 as amended by informal document GRVA-20-22 and discussed the open issues (also listed in GRVA-20-21). The representative of OICA provided input on the open issues in GRVA-20-37. GRVA:

1. Agreed to include the new paragraph 17 proposed by Japan (GRVA-20-08).
2. Discussed whether to limit the operational conditions for the System-Initiated Manoeuvres (SIM) and agreed to only allow SIM on motorways for systems not withholding the Hands-On Request to reach consensus on SIM.
3. Agreed, following discussion, with option 2 for para. 5.5.3.2.1.
4. Discussed the remaining items related to periodic monitoring (GRVA-20-49).
5. Reviewed the editorial corrections proposed by China (GRVA-20-34).
6. Discussed timing considerations on DCAS Lane Change Procedure (GRVA-20-58).
7. Discussed the means to ensure that drivers understand the limitations of the system and their responsibilities when the system is operating, particularly for system-initiated manoeuvres (GRVA-20-57 and Rev.1 as well as GRVA-20-60).

67. GRVA adopted ECE/TRANS/WP.29/GRVA/2024/32 as amended by GRVA-20-59/Rev.2 and requested the secretariat to submit the proposal for the 01 series of amendments to UN Regulation No. 171 to WP.29 and the Administrative Committee of the 1958 Agreement (AC.1) for consideration and vote at their March 2025 sessions.

68. GRVA approved the next steps for the IWG on ADAS as proposed in GRVA-20-21/Add.1.

69. GRVA requested the secretariat to distribute GRVA-20-54, a proposal for a supplement to the original version of UN Regulation No. 171 prepared by the European Commission Joint Research Centre, with an official symbol for consideration at its January 2025 session.