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
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
Report
US & Canada
Colorado
Development and application of a US real-world vehicle emissions database
Analyzes remote sensing data from VA and CO to investigate the emissions of U.S. cars and trucks….
November 1, 2020
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