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

Europe
Gliwice
Potential impacts of a low-emission zone on air pollutant emissions in Gliwice
Analyzes the potential emission reduction benefits of a low-emission zone in Gliwice, Poland….
September 24, 2024
Report

Europe
Aberdeen
Real-world vehicle emissions in four major Scottish cities
Concludes a three year long real-world emissions testing campaign in four Scottish cities under the TRUE Initiative….
August 28, 2024
Report

Asia
Delhi
Real-world motor vehicle exhaust emissions in Delhi and Gurugram using remote sensing
Analyzes real-world emissions from vehicles in India’s National Capital Region to determine high-emitters….
August 22, 2024
Report

Latin America
Mexico City
Assessment of real-world passenger vehicle and taxi emissions in Mexico City
Analyzes real-world emissions from vehicles in Mexico City through the TRUE Initiative….
July 4, 2024
ES
Report

Europe
Aberdeen
Assessment of real-world vehicle emissions from four Scottish cities in 2022
Remote sensing campaigns in Scotland collect real-world emissions data to help inform policy and identify defective or manipulated vehicles….
March 20, 2024
Technical Note

Middle East
Abu Dhabi
Evaluation of real-world vehicle emissions in Abu Dhabi
Analyzes data of real-world NOx and particulate matter emissions from LDVs and HDVs in Abu Dhabi collected via remote sensing….
December 11, 2023