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
Report
US & Canada
Seattle
Seattle drayage truck emissions and environmental justice analysis
Analyzes spatial patterns of drayage truck idling and driving emissions in the Port of Seattle alongside health data and environmental justice indicators….
January 29, 2026
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
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
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
Case Study
US & Canada
Colorado
Particulate matter emissions from U.S. gasoline light-duty vehicles and trucks
New analysis finds increased levels of particulate matter tailpipe emissions from light-duty gasoline cars and trucks across the US….
June 22, 2023
Report
US & Canada
New York City
Air quality and health impacts of diesel truck emissions in New York City and policy implications
Uses real-world emissions measurements to examine inequitable exposure to air pollution from diesel trucks….
April 13, 2022
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