Proposal to permit the manufacturer to specify its own formula for the calculation of s_critical. The current formula does not take the dynamic behaviour of vehicles into account and therefore requires gaps that under some traffic conditions don’t usually occur. Since there are different ways of addressing the dynamic behaviour of the vehicles with regard to the original formula, this proposal would allow the manufacturer to specify its own formula provided the safety principle is maintained.

Proposal to amend Annex 8 (Test requirements for Corrective and Automatically Commanded Steering Functions (ACSF)), paragraph 3.5. (Tests for ACSF of Category C) in order to clarify that enabling of the system as part of the test procedure is only necessary when the system is not yet enabled.

Proposal for provisions concerning:

1. B1 lane centering
2. ACSF activation conditions
3. Driver override
4. Clarification of ACSF standby-mode
5. Clarification of “ready-to-intervene"
6. Indication to the driver in case of suppression
7. Clarification of suppression criteria
8. Sensor test before activation.

Proposal to stipulate that “Automatic deactivation by the system of the direction indicator is required only if the lane change manoeuvre is initiated automatically, and if the direction indicator control is not fully engaged (latched position) during the lane change manoeuvre.” The proposal also would modify the high-speed test to end once the system has given an optical “hands-off” warning since the entire warning cascade is checked during the low-speed test. For M₂ and M₃ vehicles, the amendment allows a corrective steering function to use haptic signals as an alternative to acoustic signals for these categories of vehicles that are equipped with Lane Departure Warning System compliant with UN R130. This change would specify that the haptic warning may not be given solely via the steering wheel (e.g., provided in the driver’s seat).

Proposal to resolve measurement concerns in the test requirements for ACSF of Category B1 and C by introducing provisions for tolerances, including:

1. inclusion of the position at which the lateral acceleration was measured and the position of the centre of gravity of the vehicle for better traceablility,
2. sampling rate of at least 100 Hz for dynamic testing,
3. specification of filters and cut-off frequency for determination of lateral acceleration,
4. option to measure “overriding force” torque via an internal sensor or an external device (e.g., steering robot).