The draft amendment to enable automated steering systems for use at speeds above 10 km/h includes provisions for a minimal risk maneuver (MRM) in the event that the driver fails to respond to a demand to assume control of the vehicle. This document proposes provisions for the automatic activation of hazard warning lights under an MRM scenario.

Proposal to introduce technical requirements for Corrective Steering Functions (lane departure prevention, lane-keeping assistance (LKAS), steering angle correction, etc.) as defined in the regulation. The proposal offers four options to ensure appropriate approvals of LKAS and related CSF systems until such time as more precise requirements can be defined:

• Option 1 and option 2: Not to grant any type approvals for corrective steering functions until detailed technical requirements for CSF are incorporated into this Regulation.
• Option 3: Amend the definition of CSF as proposed in this document.
• Option 4: Amend the definition of corrective steering functions and to include technical requirements for LKAS as an ASCF of Category B1 as proposed in this document.

Proposal to reduce the maximum delay for warning a driver of prolonged ‘hands-off driving’ as a function of vehicle speed. The current calculation is based upon 30 seconds (i.e., t(s) = 30(s) * 130/V, where V is the speed of the vehicle in km/h at the time when the system has detected that the driver is no longer holding the steering control). Korea proposes 15 seconds. Additionally t would not be permitted to be greater than 180 seconds.

Proposal on CAT A based on document ACSF-07-07.

Proposal to exempt automated parking systems from the draft requirement for tactile signals on the steering control. In a parking maneuver, the driver does not hold the steering wheel.

Proposal to clarify the intent of “a means of detecting that the driver is holding the steering control” by specifying that the vehicle manufacturer would define “holding the steering control” (e.g., one hand, two hands, firmness of grip, etc.) for each vehicle/system under test.

Proposal from Germany and the Republic of Korea to resolve measurement concerns in the test requirements for ACSF of Category B1 and C. The proposal addresses issues identified in Annex 8, improves reproducibility and robustness of the procedures, fills in gaps in the test cases, and provides additional details on measuring equipment and test execution.

Korea input regarding criteria for ensuring automated vehicles maintain a safe following distance from preceding vehicles as a function of time in seconds.

Proposal to amend 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:

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).

Proposal to clarify the pretest conditions for measuring steering effort under a failure condition.

Proposal to insert new Paragraph 6.2.5.1.1. into UN R79 (Supplements 17 to 03 series and 12 to 04 series):

• Insert new Paragraph 6.2.5.1.1. into UN R79
• If requested by the vehicle manufacturer, the vehicle may undergo up to ten figure-eight manoeuvres, where each loop of the figure is 40m diameter at 10km/h speed with intact steering equipment, before the measurement of steering efforts with a failure in the steering equipment
• Clarify pre-test conditions for measuring steering effort under a failure condition
• Stabilize power steering oil temperature, particularly for vehicles of category N₃ and M₃

Proposal to amend para. 5.3.3.2. to clarify that steering shall remain possible with performance laid down in para. 6. for the intact steering system in case of control transmission failure, amend para. 6.1.1. to specify that tests shall be conducted on a level surface affording good adhesion at ambient temperature between 0°C and 45°C, with provisions for deviating conditions at manufacturer request with Technical Service agreement, and insert new para. 6.2.5.1.1. to permit vehicle manufacturers to request at least 10 “figure of eight” manoeuvres with 40 m diameter loops at 10 km/h speed prior to measurement of steering efforts with steering equipment failure.