Since 2011, several dozen EU cities have implemented solutions to meet the requirements of the White Paper on Transport. However, the White Paper does not provide for the rapid technological progress. This progress has popularized smartphones with continuous access to the Internet, which in turn has allowed to create applications that make people’s lives in the city easier. A city with the possibility of interactive use of aggregated data to meet the needs related to living and functioning in the city, is called a smart city. The European Commission has created an additional mechanism to encourage local authorities to take a more comprehensive approach to urban mobility – the Urban Mobility Package – where the focus is on people, not on traffic, as is the case with traditional transport policy-making methods. The article reviews the projects implemented in Gdańsk and Gdynia that are consistent with the idea of sustainable development and are aimed at adapting both cities to the requirements of the European Commission and the changing reality.