CityMobilNet takes on one of the most prominent and EU-wide apparent policy challenges for Europe’s cities today: urban mobility.The European Commission underlines the importance of urban transportation due to the central role of cities for growth, employment and the welfare of citizens (over 80% of EU’s GDP is generated in cities). Cities need an efficient transportation system to come up to this essential role. But they face major problems and increasing inefficiency due to amongst others high loads of GHG emissions and costs arising from chronic congestions (up to € 80 billion per year).CityMobilNet faces these major problems of urban mobility by empowering cities to develop sustainable urban mobility strategies. It takes up the concept of Sustainable Urban Mobility Plans (SUMPS), which designs urban mobility development in a comprehensive and co-productive process for a time scope of 10-15 years. CityMobilNet adapts the concept of SUMPs to the diverse local needs of its cities by putting SUMP Integrated Action Plans in practise at the background of each cities’ mobility challenges and planning and participation background. The cities gain capacity and knowledge for a co-productive development of sustainable urban mobility strategies out of the network’s transnational learning and exchange activities. They will be able to use their new gained proficiencies not only for urban mobility strategies but for developing solutions and policies for all urban challenges.