GRVA/2026/38
UN R152: Proposal for a Supplement 7 to the 02 series of amendments
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Proposal to amend para. 2.14. to insert a footnote clarifying that the road surface friction coefficient of 1 for sufficient nominal Peak Braking Coefficient (PBC) is understood to be a minimum value. This document is based on working document GRVA/2026/21 as amended by informal document GRVA-25-36.
Peak braking coefficient: the measure of tire to road surface friction based on the maximum deceleration of a rolling tire.