The issues discussed in this article concern the basic assumptions for the sustainable development of public transport in cities. We discussed the need and direction of changes that occur in public transport that were referred to both users and transport organizers in cities. To this end, we characterized the activities which encourage urban residents to use forms of urban transport and the limitations of commuting via individual transport. The purpose of this article was to determine the main directions and areas of development of public transport in Szczecin. In addition, we also presented the solutions applied in the city transport system aimed at making it sustainable. In addition, an attempt was made to determine the impact of selected solutions on residents’ transport behaviors. The survey research method was used to examine societal opinions and expectations regarding public transport. We also approximated the basic investments that have been implemented to make transport more sustainable and the activities for the development of electromobility. Future research directions on the sustainability of transport in the city, and especially on limiting vehicular traffic, were also discussed.