1. The Working Party on Noise and Tyres (GRBP) held its seventy-eighth session from 30 August to 1 September 2023 in Geneva. The meeting was chaired by Mr. S. Ficheux (France). Experts from the following countries participated in the work following Rule 1(a) of the Rules of Procedure of the World Forum for Harmonization of Vehicle Regulations (WP.29) (TRANS/WP.29/690/Rev.2): Australia, Canada, China, Czechia, Finland, France, Germany, India, Italy, Japan, Netherlands, Norway, Republic of Korea, Russian Federation, Saudi Arabia, South Africa, Spain, Sweden, Switzerland and United Kingdom of Great Britain and Northern Ireland. Experts from the European Commission participated. Experts from the following non-governmental organizations also participated: American Automotive Policy Council (AAPC), Bureau International Permanent des Associations de Vendeurs et Rechapeurs de pneumatiques (BIPAVER), International Motor Vehicle Inspection Committee (CITA), European Association of Automotive Suppliers (CLEPA), European Garage Equipment Association (EGEA), European Tyre and Rim Technical Organization (ETRTO), Imported Tyre Manufacturers Association (ITMA), International Motorcycle Manufacturers Association (IMMA), International Organization for Standardization (ISO), International Organization of Motor Vehicle Manufacturers (OICA) and World Blind Union (WBU).