UN adopts global standard to measure and limit brake particle emissions

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🗞️ Driving the news: The United Nations has adopted the first global regulation to measure and limit particulate emissions from vehicle braking systems, addressing a growing source of urban air pollution as exhaust emissions decline

🔭 The context: Adopted by the UNECE World Forum for Harmonization of Vehicle Regulations (WP.29), the new UN Regulation No. 179 introduces standardized laboratory procedures and emission limits for brake-generated particulate matter from passenger cars and light commercial vehicles
• The rule builds on earlier global technical standards designed to measure brake emissions

🌍 Why it matters for the planet: As vehicles become cleaner at the tailpipe, non-exhaust emissions from brakes and tyres are emerging as a major contributor to particulate pollution, particularly in cities
• Regulating brake particles helps close a key environmental gap, improving urban air quality while supporting cleaner transport systems during the transition to electric mobility

⏭️ What’s next: The regulation is expected to be implemented in Euro 7 vehicle standards in the European Union and in the United Kingdom, with entry into force by the end of 2026
• Additional rules are also being developed to ensure replacement brake components maintain low emission levels throughout a vehicle’s lifetime

💬 One quote: “This regulation represents a decisive milestone in global vehicle emission policy.” — Per Ohlund, Chair of the UNECE Working Party on Pollution and Energy

📈 One stat: Brake emissions will be regulated based on PM10 particle limits measured in milligrams per kilometer (mg/km) using standardized brake dynamometer testing cycles

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