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 to amend UN R171 based on GRVA/2026/15:

• Insert new introduction paragraph 17 establishing the regulation on current technology with continuous review based on data
• Amend paragraphs on system boundaries, driver disengagement detection, manoeuvre initiation, and Risk Mitigation Function
• Clarify driver state monitoring and visual engagement assessment
• Update terminology for powertrain
• Delete duplicate definitions
• Add processes for safety management during operation phase
• Insert definition of “Evidence”
• Clarify base and extended test requirements
• Update language from “cyclist” to “bicycle” in test scenarios

Proposal to clarify UN R171 on Driver Control Assistance Systems (DCAS):

• 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
• 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.