Tobias Escher is an Assistant Professor in Sociology at Heinrich-Heine-University Duesseldorf. He leads a junior research group (funded by the German Federal Ministry of Education and Research) that investigates effects of citizen participation on quality and legitimacy of political decisions with a special focus on local level planning processes regarding mobility transitions. With his research group he analyses how German councils utilize citizen participation to increase the sustainability and acceptance of measures to support sustainable mobility, relying among other things on representative population surveys and extensive interviews with stakeholders. In addition, they build a database of participatory processes in German councils that are related to mobility planning in order to analyse factors contributing to particular outcomes of such citizen engagement. His special interest is in how to design participatory processes to enable both substantive contributions by citizens and widespread acceptance of the agreed measures.