In a reflection on changes in the automotive industry, garage owner Kevan Gibbons notes significant developments over his 45 years in the motor trade. He observes that cars have increased in size, and urban driving patterns have evolved, resulting in more frequent stops and starts. This shift accelerates brake wear, especially in heavier vehicles and higher temperatures. Gibbons further indicates that quality and prices of brake pads have declined, leading to increased dust emissions.
While tailpipe emissions have reduced, the contribution of other vehicle components to pollution is rising. In numerous urban areas, brake wear has emerged as a major source of non-exhaust emissions, as reported by EIT Urban Mobility, an organization focused on enhancing urban transport. The director of innovation at EIT Urban Mobility, Adriana Diaz, mentions a concerning lack of awareness regarding this form of pollution. Brake dust, composed of small metal particles, carbon, and other substances, can potentially be more harmful to lung health than diesel exhaust.
Electric vehicles (EVs), while producing no exhaust emissions, still generate some brake dust due to the use of friction braking alongside regenerative braking. The automotive industry is preparing to address brake emissions more effectively, with the European Union introducing regulations next year aimed at limiting brake emissions from new vehicles. The forthcoming Euro 7 standards will cap emissions of fine particles (PM10) at 3–11 mg/km, based on vehicle type.
Currently, a typical vehicle emits about 8.8 mg/km of PM10 from brakes. The EU estimates a 27% reduction in brake-related emissions by 2035 due to these regulations. Other regions, such as China, may soon follow suit with their own regulations targeting finer particles. As manufacturers explore ways to reduce brake emissions, they may employ advanced materials and new production techniques to comply with the upcoming standards.
Consumers might notice cleaner wheels and reduced brake dust accumulation as these changes take effect. However, Gibbons points out that many customers prioritize cost over environmental considerations. While reducing brake emissions is a positive step for improving air quality, experts emphasize the need for broader strategies aimed at reducing overall vehicle use to achieve lasting health and environmental benefits.
Source: https://www.bbc.com/news/articles/cp3l4qz1l9qo?at_medium=RSS&at_campaign=rss