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.

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).