GRVA/2025/7
UN R79: Proposal for a Supplement to the 03 and 04 series of amendments

Proposal to clarify provisions for full power steering systems such as steer-by-wire systems.

UNECE server
Excerpts from session reports
GRVA | Session 20 | 23-27 Sep 2024

75. The representative of OICA recalled the purpose of ECE/TRANS/WP.29/GRVA/2024/28 and presented (GRVA-20-15) the status report of their activities on Steer-by-Wire (SbW) and detailed the current considerations regarding the energy management system and SbW testing provisions. The expert from Japan advised also considering stationary state testing provisions. GRVA noted the good progress regarding the energy management system provisions. GRVA invited the steering experts to find consensus on the testing provisions and invited the experts to submit an official document for consideration at the January 2025 session.

GRVA | Session 22 | 2-6 Jun 2025

50. During the consultations, the experts reviewed the proposal tabled by the expert from the United Kingdom of Great Britain and Northern Ireland (ECE/TRANS/WP.29/GRVA/2025/32), which aimed to ensure that where vehicles exhibit functionality meeting the definition of Automatically Commanded Steering Function (ACSF) of Categories B2 or E, they are required to comply with the correct series of UN Regulation No. 171. The experts also reviewed a proposal tabled by the expert from OICA, which contained amendments to the Remote-Controlled Parking (RCP) provisions (GRVA-22-07 and GRVA-22-09) in UN Regulation No. 79 (Steering equipment).

51. GRVA adopted ECE/TRANS/WP.29/GRVA/2025/32 and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote in November 2025.

52. GRVA noted GRVA-22-09 and GRVA-22-07. GRVA agreed to consider a revised proposal at the next session.

53. During the consultations, the expert from OICA proposed that transitional provisions should be inserted in ECE/TRANS/WP.29/2025/61 and ECE/TRANS/WP.29/2025/62.

54. GRVA reviewed GRVA-22-35 and GRVA-22-36. GRVA could not follow the recommendation by OICA due to administrative reasons but agreed to resume discussion in September 2025.