UN R79: Proposal for amendments to the 03 series of amendments
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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 scritical 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.

Reference Number: GRVA-05-53
Origin: Germany
Date: 12 February 2020
Proposal Status: Informal GR review
Related Documents:
GRVA-07-20 | UN R79: Proposal for amendments to document GRVA/2020/22
GRVA/2020/24 | UN R79: Proposal for a Supplement to the 03 series of amendments
Working Party on Automated and Connected Vehicles | Session 5 | 10-14 Feb 2020

47. The expert from OICA presented GRVA-05-52, introducing GRVA-05-30 with amendments to the provisions applicable to ACSF of Category C.

48. The expert from CITA introduced GRVA-05-50 with amendment proposals to Annex 8.

49. The expert from Germany introduced GRVA-05-53 with amendment proposals to para. (critical situation).

50. GRVA requested the secretariat to distribute GRVA-05-30, GRVA-05-50 and GRVA-05-53 with official symbols at its September 2020 session.