JOHANNESBURG, Gauteng — Johannesburg vehicle emissions are degrading local air quality at levels far exceeding international standards, according to Africa’s first real-world transport pollution study. The groundbreaking report reveals that hundreds of thousands of vehicles on the city’s roads are releasing harmful pollutants, directly linking everyday traffic to severe public health risks, including respiratory illnesses, childhood asthma, and premature deaths.
The comprehensive report was released by the International Council on Clean Transportation (ICCT) in partnership with the City of Johannesburg and the University of Johannesburg. Utilizing advanced roadside remote sensing technology, researchers analyzed the emissions of more than 250,000 vehicles across the city, marking the first large-scale campaign of its kind in the African region.
A spokesperson for the ICCT highlighted the unprecedented nature of the data, noting that capturing over 250,000 real-world emissions measurements from vehicles actively operating on Johannesburg roads provides a critical foundation. This data is designed to inform policies that can effectively and equitably reduce transportation emissions in the city.
While the study assessed various vehicle types, including petrol versus diesel and cars versus buses, experts identified specific high-risk categories. A representative from the research team emphasized that while all vehicles contribute to pollution, the primary concerns are petrol vehicles, minibus taxis, and light commercial trucks. These specific categories will be the focal point for collaborative efforts to address high-risk emissions.
In response to the findings, a spokesperson for the City of Johannesburg stated that the report provides the vital evidence needed to strengthen air quality interventions, improve public transport, and enhance overall emissions management. The city is currently developing a “cleaner zone policy” tailored to the metro.
“This study goes a long way in actually assisting us to develop evidence-based interventions that are targeting specific vehicle categorizations,” the City of Johannesburg spokesperson explained. “We now understand that we must focus on light commercial vehicles and minibus taxis as a starting point, rather than the total vehicle pack. Over and above that, we want to use this data to create the necessary public awareness.”
A spokesperson from the University of Johannesburg added that the study delivers an accurate, daily picture of the pollution residents are exposed to, which will guide future policies aimed at reducing harmful emissions through sustainable urban development. The university representative stressed the importance of urban planning that minimizes travel distances. By bringing health services, shops, and economic hubs closer to residential areas, the dispersion of pollution can be significantly reduced.
“Only then, once we’re on an equitable scale, can we start engaging people to transition to electric or hybrid vehicles,” the University of Johannesburg spokesperson noted.
Researchers conclude that these findings should serve as a definitive wakeup call for policymakers. The report identifies cleaner vehicles, stricter emission standards, and improved public transport as key measures required to curb pollution. Experts warn that without urgent, targeted intervention, vehicle emissions will continue to pose a significant and growing threat to both public and environmental health in Johannesburg.
