Silvia Maffii has more than 25 years of experience in transport economics and planning and is co-founder of TRT Trasporti e Territorio, of which she is Managing Director since 1992. Her expertise lies in feasibility studies and cost-benefit analysis of transport projects across the road, rail maritime and urban transport sectors, that she combines with a wide professional and research experience in modelling at urban and regional scale and in the assessment of land-use, socio-economic and environmental impacts of transport investment and policies. She has a long record of experience in project leadership and management in both domestic and international studies, and has served as key expert in service projects for the European Commission and other international organisations. She has been teaching transport planning for several years at the Politecnico of Milan.