High Volume Transport

Vital transport research to ensure accessible, affordable and climate friendly transport for all.

Transport Decarbonisation Index (TDI)


The project’s main objective is to assist Low and Middle-Income Countries (LMICs) in Africa and South Asia in reducing greenhouse gas emissions in surface transport by providing a diagnostic toolkit called the Transport Decarbonisation Index (TDI). The TDI assesses a country’s preparedness towards achieving net-zero emissions by 2050, enabling comparisons with other nations and tracking long-term progress.

This tool helps LMICs better understand which measures are most effective for their specific circumstances, taking into account factors like development status and transport system characteristics. The TDI not only diagnoses decarbonisation but also measures progress and indicates if more stringent measures are required.


The project involves four phases, beginning with a comprehensive assessment of existing knowledge and tools related to transport decarbonisation. It then progresses to the development of the TDI methodology, pilot testing in LMICs, and, finally, the dissemination of findings. The ultimate goal is to disseminate the project’s insights in an accessible and engaging manner to encourage the use of the TDI by decision-makers and practitioners in more countries.