Sustainable development requires an integrated approach to policy and science because many of the issues it raises cannot be addressed within a single department or using the tools of individual scientific disciplines. This is where the Wuppertal Institute’s research programme begins – by taking an interdisciplinary approach and working towards systems understanding. Applied sustainability research is the Wuppertal Institute’s stated mission. The Wuppertal Institute collaborates with a multitude of universities and institutes around the world. A scientific International Advisory Board supports the Institute in defining fundamental research strategies as well as ensuring the quality and independence of its research. The Wuppertal Institute has longstanding experience with a multitude of national, European and international projects on sustainable transport. It currently leads an international project (SOLUTIONS) on sustainable mobility around the world funded under the 7th framework programme. The Wuppertal Institute has a long record of experience with ex-ante and the ex-post evaluation of transport, energy and climate policies – as well as the design and evaluation of carbon reduction and energy efficiency strategies, programmes and services carried out by companies, public policy and other actors, in projects such as FLOW and EMPOWER (H2020), TIDE (FP7), EVIDENCE (IEE), and SHAPE-IT (ERA-NET). WI also worked on several projects at the national and local level in Germany that assessed the potential of sustainable transport polices.