Proposal to amend UN R171 to modify paragraphs 5.5.4.2.8.2., 5.3.7.2.4.2., 5.3.7.2.6.1., 6.4.2., 7.2.3.1., 14.2., and Annexes 3 and 4. The amendments include clarifications regarding driver engagement determination, system boundary conditions, automatic acceleration in non-highway environments, system-initiated manoeuvres tracking, production discontinuation, documentation retention periods, supplier safety management arrangements, and test scenario specifications for bicycle and cyclist targets.

Consolidated proposal to clarify provisions in the original version of the Regulation. See GRVA/2026/16 for the proposed amendments.

Proposal with the amendments to UN R171 presented in the consolidated version in GRVA/2026/15. Modifications include: inserting new introduction paragraph 17 establishing the regulation on current technology with continuous review based on data; amending paragraphs on system boundaries, driver disengagement detection, manoeuvre initiation, and Risk Mitigation Function; clarifying driver state monitoring and visual engagement assessment; updating terminology for powertrain; deleting duplicate definitions; adding processes for safety management during operation phase; inserting definition of “Evidence”; clarifying base and extended test requirements; and updating language from “cyclist” to “bicycle” in test scenarios.

Proposal to clarify UN R171 on Driver Control Assistance Systems (DCAS). The modifications include clarifications to definitions, adding “Highway-like road” definition; clarifications to system boundary detection, manoeuvre initiation, and driver disengagement requirements; amendments permitting withholding of hands-on requests on highway-like roads up to 130 km/h; clarifications on Risk Mitigation Function terminology; amendments allowing alternative strategies for lower-speed lane changes; addition of operational phase safety management processes; and clarifications on testing requirements and non-rule-based algorithm repeatability.

Consolidated version based on WP.29/2025/7 as amended by WP.29-195-05, WP.29/2025/144, GRVA-24-18, and GRVA-24-19. See GRVA/2026/18 for the proposed amendments.