This agenda item relates to UN R138 Quiet Road Transport Vehicles.

11. The expert from Poland proposed to allow surfaces other than ISO 10844 for measurements in standstill condition (GRBP-71-28-Rev.1). GRBP adopted the proposal, as contained in Annex V, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their June 2020 sessions as a draft Supplement 2 to the 01 series of amendments to UN Regulation No. 138.