Proposal for provisions concerning:

• B1 lane centering
• ACSF activation conditions
• Driver override
• Clarification of ACSF standby-mode
• Clarification of “ready-to-intervene"
• Indication to the driver in case of suppression
• Clarification of suppression criteria
• Sensor test before activation.

47. The expert from OICA presented GRVA-05-52, introducing GRVA-05-30 with amendments to the provisions applicable to ACSF of Category C.

48. The expert from CITA introduced GRVA-05-50 with amendment proposals to Annex 8.

49. The expert from Germany introduced GRVA-05-53 with amendment proposals to para. 5.6.4.7. (critical situation).

50. GRVA requested the secretariat to distribute GRVA-05-30, GRVA-05-50 and GRVA-05-53 with official symbols at its September 2020 session.

The proposal to clarify that enabling the system under the test procedure is only necessary in cases where the system is not already in the enabled state.

47. The expert from OICA presented GRVA-05-52, introducing GRVA-05-30 with amendments to the provisions applicable to ACSF of Category C.

48. The expert from CITA introduced GRVA-05-50 with amendment proposals to Annex 8.

49. The expert from Germany introduced GRVA-05-53 with amendment proposals to para. 5.6.4.7. (critical situation).

50. GRVA requested the secretariat to distribute GRVA-05-30, GRVA-05-50 and GRVA-05-53 with official symbols at its September 2020 session.

ACSF systems in use were brought to market based on exemption approvals in the EU. These systems show a good and safe performance. Approvals according to UN R79/03 would force modifications to currently used systems without any apparent safety benefit. The current formula for the calculation of s_critical does not take the dynamic behaviour of the vehicles into account, therefore requires gaps that under some traffic conditions don’t usually occur. Since there are different ways of addressing the dynamic behaviour of the vehicles with regard to the original formula, this proposal would allow the manufacturer to specify its own formula provided the safety principle is maintained.

47. The expert from OICA presented GRVA-05-52, introducing GRVA-05-30 with amendments to the provisions applicable to ACSF of Category C.

48. The expert from CITA introduced GRVA-05-50 with amendment proposals to Annex 8.

49. The expert from Germany introduced GRVA-05-53 with amendment proposals to para. 5.6.4.7. (critical situation).

50. GRVA requested the secretariat to distribute GRVA-05-30, GRVA-05-50 and GRVA-05-53 with official symbols at its September 2020 session.

Proposal for amendments to document GRVA/2020/22.

39. The expert from OICA introduced ECE/TRANS/WP.29/GRVA/2020/22, amended by GRVA-07-20 with proposed amendments to the provisions on ACSF of Category C. He explained that GRVA-07-20 also incorporated GRVA-07-15, GRVA-07-16 and GRVA-07-19. He withdrew GRVA-07-18. The expert from AVERE supported the OICA proposal. GRVA-07-29 superseded by GRVA-07-32. GRVA had remained divided on such amendments since its fourth session.

44. The expert from AVERE introduced GRVA-07-15. GRVA requested the secretariat to distribute this document with an official symbol at its next session. He also introduced GRVA-07-16 amendment proposals to ACSF of Category C. The experts from the Netherlands and Denmark expressed reservations with the document. GRVA could not reach consensus.

Proposal for provisions concerning:

1. B1 lane centering
2. ACSF activation conditions
3. Driver override
4. Clarification of ACSF standby-mode
5. Clarification of “ready-to-intervene"
6. Indication to the driver in case of suppression
7. Clarification of suppression criteria
8. Sensor test before activation.

39. The expert from OICA introduced ECE/TRANS/WP.29/GRVA/2020/22, amended by GRVA-07-20 with proposed amendments to the provisions on ACSF of Category C. He explained that GRVA-07-20 also incorporated GRVA-07-15, GRVA-07-16 and GRVA-07-19. He withdrew GRVA-07-18. The expert from AVERE supported the OICA proposal. GRVA-07-29 superseded by GRVA-07-32. GRVA had remained divided on such amendments since its fourth session.

Proposal to amend Annex 8 (Test requirements for Corrective and Automatically Commanded Steering Functions (ACSF)), paragraph 3.5. (Tests for ACSF of Category C) in order to clarify that enabling of the system as part of the test procedure is only necessary when the system is not yet enabled.

41. GRVA adopted ECE/TRANS/WP.29/GRVA/2020/23 and requested the secretariat to submit it as supplement to the 03 series of amendments to UN Regulation No. 79 for consideration and vote by WP.29 and AC.1 at their March 2021 sessions.

Proposal to permit the manufacturer to specify its own formula for the calculation of s_critical. The current formula does not take the dynamic behaviour of vehicles into account and therefore requires gaps that under some traffic conditions don’t usually occur. Since there are different ways of addressing the dynamic behaviour of the vehicles with regard to the original formula, this proposal would allow the manufacturer to specify its own formula provided the safety principle is maintained.

40. The expert from Germany introduced ECE/TRANS/WP.29/GRVA/2020/24 amending para. 5.6.4.7. The expert from the Netherlands provided comments. GRVA invited the experts from Germany and the Netherlands to collaborate on a revised proposal. The expert from UK insisted on the need to review the lane change related provisions.