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.

Proposal to:

• Amend Introduction para. 17 to clarify DCAS development based on current technology and data
• Amend para. 2.11 to delete “the” before “travel”
• Insert new para. 2.28.1. defining “Highway-like road” with characteristics including at least two lanes, designated speed limit of at least 80 km/h, physical separation dividing opposite traffic, and absence of at-grade pedestrian crossings, rail crossings, or road intersections
• Amend para. 5.3.5.1 to specify system shall leave active mode with exception of driver unavailability response
• Amend para. 5.3.7.1.4 to delete “the” before “front tyre”
• Amend para. 5.3.7.2.1.1 to change “detected” to “deemed” and specify disengagement duration of more than 2s
• Insert new para. 5.3.7.2.1.13 requiring manufacturer to describe system behaviour if driver detected disengaged during manoeuvre
• Amend para. 5.3.7.2.3.1 to delete requirements reference and require sufficient time for driver confirmation
• Amend para. 5.3.7.2.5.3.1 to add “or highway-like road” to highway operation requirements
• Delete para. 5.3.7.2.4.3 and renumber paras. 5.3.7.2.4.4 to 5.3.7.2.4.11 as 5.3.7.2.4.3 to 5.3.7.2.4.10
• Amend para. 5.3.7.3.1 to reference systems driver unavailability response and RMF requirements of 04 series UN R79
• Amend para. 5.3.7.3.3 to specify system capable of lane changes during driver unavailability response in compliance with RMF requirements
• Amend para. 5.5.4.2.2.3 to renumber and require warning strategies prioritize simultaneously activated emergency assistance systems
• Amend paras. 5.5.4.2.5.2 and 5.5.4.2.5.2.1 to specify visual disengagement criteria, dashboard consideration limited to 3 seconds, and visual re-engagement duration of at least 200 milliseconds
• Amend para. 5.5.4.2.6.5 to allow HOR withholding on highway-like roads at speeds up to 130 km/h and require verification of road characteristics for at least 500 m or 30 seconds, demonstration of safe cyclist operation, and HOR at least 7s before end of highway-like road
• Amend paras. 5.5.4.2.7 and 5.5.4.2.7.1 to add assessment of gaze direction changes and insert new para. 5.5.4.2.7.1
• Amend para. 6.2.4.1 to permit deviation from assessment at speeds up to 60 km/h with manufacturer explanation to Type Approval Authority
• Amend para. 14.2 to change “definitely” to “definitively”
• Amend Annex 1 to add para. 6.4.1 for system capability of withholding HORs on highway-like roads
• Delete Annex 3 paras. 2.15 and 2.16 defining “Highway” and “Non-Highway”
• Amend Annex 3 para. 3.1.1 to change “definitely” to “definitively”
• Renumber Annex 3 para. 3.5.7 to 3.4.5 and amend to require system information strategy

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.

Proposal to:

• Amend Introduction para. 17 to clarify DCAS development based on current technology and data
• Amend para. 2.11 to delete “the” before “travel”
• Insert new para. 2.28.1. defining “Highway-like road” with characteristics including at least two lanes, designated speed limit of at least 80 km/h, physical separation dividing opposite traffic, and absence of at-grade pedestrian crossings, rail crossings, or road intersections
• Amend para. 5.3.5.1 to specify system shall leave active mode with exception of driver unavailability response
• Amend para. 5.3.7.1.4 to delete “the” before “front tyre”
• Amend para. 5.3.7.2.1.1 to change “detected” to “deemed” and specify disengagement duration of more than 2s
• Insert new para. 5.3.7.2.1.13 requiring manufacturer to describe system behaviour if driver detected disengaged during manoeuvre
• Amend para. 5.3.7.2.3.1 to delete requirements reference and require sufficient time for driver confirmation
• Amend para. 5.3.7.2.5.3.1 to add “or highway-like road” to highway operation requirements
• Delete para. 5.3.7.2.4.3 and renumber paras. 5.3.7.2.4.4 to 5.3.7.2.4.11 as 5.3.7.2.4.3 to 5.3.7.2.4.10
• Amend para. 5.3.7.3.1 to reference systems driver unavailability response and RMF requirements of 04 series UN R79
• Amend para. 5.3.7.3.3 to specify system capable of lane changes during driver unavailability response in compliance with RMF requirements
• Amend para. 5.5.4.2.2.3 to renumber and require warning strategies prioritize simultaneously activated emergency assistance systems
• Amend paras. 5.5.4.2.5.2 and 5.5.4.2.5.2.1 to specify visual disengagement criteria, dashboard consideration limited to 3 seconds, and visual re-engagement duration of at least 200 milliseconds
• Amend para. 5.5.4.2.6.5 to allow HOR withholding on highway-like roads at speeds up to 130 km/h and require verification of road characteristics for at least 500 m or 30 seconds, demonstration of safe cyclist operation, and HOR at least 7s before end of highway-like road
• Amend paras. 5.5.4.2.7 and 5.5.4.2.7.1 to add assessment of gaze direction changes and insert new para. 5.5.4.2.7.1
• Amend para. 6.2.4.1 to permit deviation from assessment at speeds up to 60 km/h with manufacturer explanation to Type Approval Authority
• Amend para. 14.2 to change “definitely” to “definitively”
• Amend Annex 1 to add para. 6.4.1 for system capability of withholding HORs on highway-like roads
• Delete Annex 3 paras. 2.15 and 2.16 defining “Highway” and “Non-Highway”
• Amend Annex 3 para. 3.1.1 to change “definitely” to “definitively”
• Renumber Annex 3 para. 3.5.7 to 3.4.5 and amend to require system information strategy