Text approved by GRVA consolidating input from stakeholders and agreed changes to the original proposal (GRVA/2019/19) for submission to WP.29 at its March 2020 session. The proposal amends the draft text (GRVA/2019/9) submitted to resolve measurement concerns in the test requirements for ACSF of Category B1 and C by introducing provisions for tolerances, including:

• 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,
• sampling rate of at least 100 Hz for dynamic testing,
• specification of filters and cut-off frequency for determination of lateral acceleration,
• option to measure “overriding force” torque via an internal sensor or an external device (e.g., steering robot).

Presentation on Tesla experience with hands-on lane-keeping and automated lane-change systems, especially with regard to lateral acceleration and distance limits under UN R79.

Proposal to introduce provisions for a “two-step Human Machine Interface” in the requirements for Automatically Commanded Steering Functions (ACSF) of Category C lane-change functions.

Proposal to correct editorial errors in the consolidated document WP29/2016/58 relating to GRRF-80-37, GRRF/2015/22 and GRRF-81-04-Rev.1 and to insert the word “tolerance” in para. 2.3.3.4.1.

Proposal to introduce software control numbers into relevant UN Regulations.

Proposal to increase maximum lateral acceleration limit values up to 4m/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.

Proposal for a maximum time of up to 15 seconds for an Automatically Commanded Steering Function (ACSF) of Category C to start a lane change.

Proposal to stipulate that “Automatic deactivation by the system of the direction indicator is required only if the lane change manoeuvre is initiated automatically, or if the direction indicator control is not fully engaged (latched position) during the lane change manoeuvre.”

Since an Automatically Commanded Steering Function (ACSF) of Category B is required to demonstrate compliance with regard to the warning cascade under testing at low speed, it is proposed to stop the high-speed test after the system has given the optical warning, meaning it has correctly detected the hands to be off the steering wheel.

Proposal to allow a corrective steering function to use haptic signals as an alternative to acoustic signals for M₂ and M₃ vehicles equipped with Lane Departure Warning System compliant with UN R130. The proposal 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 allow for the use of the maximum operable steering wheel angle of a steering system’s design in cases where the normalized angle as calculated under the regulation cannot meet the fixed values of the regulation (i.e., between 270 and 300 degrees). The intention is to enable approval of eventual systems (e.g., steer-by-wire) that may use low steering gear ratios.

Proposal the clarify the test method for the evaluation of performance of energy sources and energy storage devices under Annex 7. In particular, the proposal clarifies that the measurement is made on the ninth brake application.

Proposal to harmonise the requirements of UN R78 with the latest amendments to UN GTR No. 3 adopted by GRVA at its fourth session. Paragraph 5.1.18 aims to clarify with an explicit article that the rider is duly informed when activating a riding mode that disables the ABS on the rear axle.