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UN R152: Proposal to amend the Peak Braking Coefficient reference
Document GRVA-09-17
29 January 2021

Argument for revising the PBC values used in the regulation based on technological progress in tyres and impact on road-friction parameters.

Submitted by CLEPA and OICA
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7. | Advanced Emergency Braking Systems

89. The expert from OICA introduced GRVA-09-18 and mentioned GRVA-09-17 explaining an issue related to the PBC reference in UN Regulation No. 152. She explained that deceleration of nine m/s2 were the basis for calculation of performance criteria and that therefore a PBC value of 0.9 was not sufficient. She mentioned a revised proposal contained in GRVA-09-18/Rev.1 (document not available) to be discussed until the next session of GRVA.

90. The expert from Germany supported the proposed way forward. The expert from Canada raised a study reservation. The experts from Korea and the European Commission supported the OICA proposal.

91. GRVA agreed to resume consideration of this item at its next session.

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