Auckland is grappling with a less-discussed source of traffic-related air pollution—non-exhaust emissions from vehicles. While efforts to reduce exhaust emissions through cleaner engines and the rise of electric vehicles have improved air quality, pollution from other vehicle-related sources is becoming more prominent. A recent study published in the Journal of the Royal Society of New Zealand highlights that road dust and particulate matter generated by tire and brake wear, road surface erosion, and the movement of loose materials significantly contribute to air pollution. The study analyzed data from 2006 to 2019, focusing on three monitoring sites: Queen Street in Auckland’s central business district, Khyber Pass on a major arterial road, and Penrose near a key highway. By combining air-quality measurements with traffic and weather data, researchers found that road dust was more strongly linked to PM₁₀ levels—tiny airborne particles that can be harmful to health—than exhaust emissions. This was especially notable in Auckland, a city known for its rainy climate, where road dust still played a major role in particulate pollution. Heavy vehicles, which made up only 4% of traffic in the study, had a disproportionately large impact on PM₁₀ levels. These vehicles may disturb soil and loose materials on roads, increasing dust levels. The study also found that strong winds exacerbated the problem when road dust was already high, while rainfall had no significant effect on PM₁₀ levels. This suggests that weather conditions can amplify the impact of road dust, but do not neutralize it. Addressing road dust is complex, as it comes from multiple sources and is not easily controlled by traditional vehicle emission standards. Non-exhaust emissions have been linked to health issues such as cardiovascular and respiratory problems, with increased hospital admissions in New Zealand attributed to such pollution. Possible solutions include better containment of soil near roads, improved dust management, and targeted restrictions on heavy vehicles in pollution hotspots. Encouraging public transport, walking, and cycling could also reduce traffic volumes and, in turn, lower road dust levels. As tailpipe emissions continue to decline, the study underscores the need for transportation and air-quality policies to address the growing challenge of non-exhaust pollution. Further research is essential to understand how new vehicle technologies, heavier vehicles, and evolving travel patterns influence this type of pollution. Policymakers and urban planners will need to adapt strategies to ensure cleaner air in the face of changing transportation dynamics.