Research
Building a global database of real-world emissions to improve local air quality and mitigate climate change.
The TRUE Initiative collaborates with local governments, on-the-ground partners, and research institutions to gather and analyze real-world emissions data. These valuable insights help cities around the world as they seek to craft low-emission transportation policies and improve existing programs. These actions will provide effective actions to address the health and climate impacts from on-road vehicles.
Our methods for collecting and analyzing data drives action towards cleaner urban transport.
Explore our research
Technical Note
Latin America
Mexico City
Pollutant emissions from light-duty vehicles across North America: A comparative analysis
Comparative real-world emissions analysis between Canada, Mexico, and the United States….
July 29, 2025
ES
Report
Africa
Kampala
Evaluation of real-world vehicle emissions in Kampala, Uganda
First-ever remote sensing campaign in Africa measures real-world emissions of Kampala’s fleet…
July 1, 2025
Report
US & Canada
Alberta
Real-world NOx emissions and health impacts from tampered and malfunctioning heavy-duty vehicles in Alberta, Canada
Models the potential rates of tampering or malfunction across the heavy-duty fleet in Alberta, Canada….
June 4, 2025
Report
Europe
Brussels
Life-cycle greenhouse gas impact of the low-emission zone in Brussels
Analyzes cumulative GHG reductions of the Brussels LEZ to model potential impacts and benefits….
March 13, 2025
Report
Europe
Bratislava
Emission measurements with ‘Plume chasing’ and subsequent inspection of heavy-duty vehicle (HDV) high emitters
Novel plume chasing technique piloted in Slovakia….
November 16, 2024
Case Study
US & Canada
Colorado
Real-world NOx emissions from diesel pickup trucks in the United States: A 2023 update
Analyzes real-world emissions of diesel pickup trucks in the United States….
October 31, 2024