The traffic sector represents a major source of pollutant emissions and of greenhouse gases in particular. As carbon emissions from transportation services are not covered by the European Emissions Trading Scheme (EU-ETS), reducing or offsetting these emissions truly benefits the greenhouse gas balance. In this project, we focus on the growing field of courier services which represent a complex chain of transportation elements bearing the potential for reducing its environmental disamenities in many different dimensions both within business-to-business services and within delivery requests from individuals, e.g., for online-shopping.The CO2URIER project will approach this challenge by means of a comprehensive analysis based on state of the art techniques of environmental and economic impact evaluation. Therefore, the overall objective of CO2URIER project is to yield concrete sustainability improvements in the courier service industry by creating more environmentally-friendly services in collaboration between Polish and German partners and at the same time provide insights for future improvements within this growing branch.http://kooperationen.zew.de/en/co2urier/home.html