70. The GRBP Chair reported on the results achieved by GRBP at its seventy-ninth session (for details, see the report of the session ECE/TRANS/WP.29/GRBP/77).

71. The GRBP chair recalled the ongoing Real Driving – Additional Sound Emission Provisions (RD-ASEP) monitoring according to the 03 series of amendments to UN Regulation No. 51 and pointed out the low response rate from contracting parties applying UN Regulation No. 51. WP.29 joined GRBP in urging type approval authorities and technical services to provide the RD-ASEP data before the end of the monitoring period in June 2024.

72. The GRBP chair reported that GRBP adopted a new series of amendments to UN Regulation No. 138 (Quiet road transport vehicles). He added that some experts from contracting parties supported the proposals as striking a delicate balance between road safety and environmental noise, while some others felt that the proposal was not ambitious enough for noise reduction.

73. The GRBP chair informed WP.29 that GRBP decided to move the prescriptions for snow grip performance of retreaded tyres and their classification as traction tyres from UN Regulations Nos. 108 and 109 to a new UN Regulation created for that purpose.

74. The GRBP chair reported that for UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip), GRBP, in cooperation with GRPE, adopted first-ever test methodologies to measure tyre abrasion. The details of these amendments could be found in a press-release on this topic published by UNECE in February 2024.

75. The representative of ETRTO pointed out the full support of their organization and the tyre industry as a whole to the important activities on tyre abrasion, including the ongoing market assessment of tyres with a view to determining future tyre abrasion limits.