UN R131: Proposal for a new series of amendments
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Proposal to

  1. delete the requirement limiting the speed reduction during the collision-imminent warning phase
  2. define a time range for the warning function to ensure adequate warning at lower speeds
  3. introduce specific requirements for the achievable speed reduction for the cases of dry roads and wet roads
  4. introduce speed reduction requirements at 70 km/h and 40 km/h for dry and wet roads, respectively
  5. restructure provisions under “Specifications” and “Test Procedure” to enable testing at different speeds
  6. prevent unintended AEBS deactivation
  7. delete certain exemptions (to be addressed at national levels)
The proposed transitional provisions would make these changes effective by 1 January 2021.

Reference Number: GRVA/2018/4
Origin: Germany
Date: 16 July 2018
Proposal Status: Formal GR review
Related Documents:
GRVA-01-21 | UN R131: Industry comments on GRVA/2018/4
GRVA-01-30 | UN R131: Modifications to provisions for heavy-duty vehicle AEBS
Working Party on Automated and Connected Vehicles | Session 1 | 25-28 Sep 2018

42. The expert from Germany referred to UN Regulation No. 131 and presented GRVA-01-30 (and GRVA-01-31 with a calculation tool), introducing ECE/TRANS/WP.29/GRVA/2018/4 which addressed the issues presented during the last two sessions of GRRF concerning the performance of AEBS for heavy vehicles. He explained that this revised proposal was more far reaching than the previous one, not only addressing the manual deactivation switch provisions but also other provisions that would contribute to make AEBS requirements for heavy vehicles corresponding to state of the art vehicle technologies, by changing “the structure” of the Regulation, “the vehicle target” requirements, the “overriding requirements” and the “warning strategy”. He concluded his presentation stating that these changes would help to minimize the false positive activation risks mentioned by the experts from Nordic countries as initial reaction on the German proposals at the last sessions of GRRF.

43. The experts from OICA presented (GRVA-01-21) comments on ECE/TRANS/
WP.29/GRVA/2018/4. The experts from Sweden and Japan expressed reservations on the proposal as they were not in the position at this stage to assess the implications of such far reaching changes on the performance of AEBS systems for heavy vehicles. The experts from Australia, Japan, Netherlands, Norway and Sweden agreed to work with the expert from Germany to review the proposal until the next session of GRVA. The experts agreed to work on this item via virtual meetings and physical meetings around the meetings of the IWG on AEBS.