This study will take stock of the different types of transport and energy network infrastructures investments co-financed by the ERDF and the CF in the 2014-2020 period. It will assess their rationale and the evidence of their effectiveness, efficiency and impact, their coherence with other policies, their relevance and the EU added value. It will seek to identify factors contributing to the success or failure of these investments under different socio-economic conditions, good practice and their contribution to growth, sustainable development and job creation. The lessons learned from both successes and failures shall be presented as part of the conclusions.