The proposed text combines the proposed changes in GRVA/2020/8 (proposal for a maximum time of 15 seconds for a lane change) with the adopted changes in GRVA/2019/24.

Proposal combining the proposed changes of GRVA/2020/9 with the previously adopted changes in GRVA/2019/24.

Amendments to refine the proposal to increase maximum lateral acceleration limit values up to 4 m/s² for speeds up to 80 km/h for M1/[N1] category vehicles, provided there is no heavy rain and ambient air temperatures are above 4°C. The proposal sets the speed at 60 kph while specifying a linear reduction of lateral acceleration to a maximum 3 m/s² at 80 kph.

Proposal for provisions concerning:

• B1 lane centering
• ACSF activation conditions
• Driver override
• Clarification of ACSF standby-mode
• Clarification of “ready-to-intervene"
• Indication to the driver in case of suppression
• Clarification of suppression criteria
• Sensor test before activation.

Video demonstration of RCP system.

The proposal to clarify that enabling the system under the test procedure is only necessary in cases where the system is not already in the enabled state.

ACSF systems in use were brought to market based on exemption approvals in the EU. These systems show a good and safe performance. Approvals according to UN R79/03 would force modifications to currently used systems without any apparent safety benefit. The current formula for the calculation of s_critical does not take the dynamic behaviour of the vehicles into account, 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 allow ACSF-B lateral acceleration above the maximum limit value in cases where the lane position cannot be maintained by the vehicle (for example, on a tightening curve).

Proposal to clarify conditions for automatic deactivation of the direction indicator pursuant to a lane change maneuver.

Presentation on the safety benefit of automated emergency steering in case of confirmed driver inability to perform the driving task.