Comments on the draft amendment to UN R79 addressing automated steering as it stood at the end of the third ACSF informal group session. This document also raises links to rear vision (UN R46), AEBS (UN R131), and park assist systems.

Presentation proposing a requirement for defensive braking on vehicles equipped with ACSF because automated steering may result in driver inattention and therefore require compensating environment monitoring and automatic braking. This type of “protective braking” is viewed as a different order of braking than AEBS given that the principle involves maintaining of distances and avoiding accidents at speed rather than as an emergency or abrupt braking.

Presentation on the concept of a minimum risk maneuver boundaries to define acceptable parameters for system-to-driver transition demands and system responses in cases of where the driver does not react.

Presentation of results from Japan’s NTSEL research into the time required for the driver to transition from automated to manual steering modes and on driver/vehicle behavior throughout the transition period under various traffic scenarios.

Proposal to consider a transition time between 2 and 4 seconds according to other variables (straight lane, curve, collision-imminent, lane change, etc.)

Summary of consensus reached during the 4th ACSF informal group session for a 4 second transition time under normal operating conditions and immediate warning under emergency conditions.

Draft amendment to enable the approval of automated steering systems (e.g., lane-keeping/lane-changing assistance) for use at speeds above 10 km/h pursuant to discussions held during the 4th ACSF informal group session.