The fourth industrial revolution is disrupting almost every industry in every country and the transport sector is not an exception in this discussion, with increasing mobility demands and evolving mobility needs in consideration of global sustainability goals. In light of these technological changes and discussions, public authorities are on the path of transition and the role of public transport authorities is still unclear for themselves, for business or even for society at large. This issue extends to transport data policies as there is still a lack a general overview concerning what pathways different cities are working on and implementing. Therefore, this study, as a part of Swedish research programme Mistra SAMS, aims to provide an overview of policies and the management of data connected with the transport sector in four selected city regions: Helsinki, London, Oslo and Singapore. Three research questions have been examined: 1. How do different transport authorities in urban regions approach transport data and perceive the value of data? 2. What kind of action plan is being implemented to create the public value of transport data within the public authorities? 3. How is all of this reflected in collaboration with third parties? Institutional theory is used in the multi-case analysis to guide the collection of data through document analysis and semi-structured interviews and provides a framework for analysis and structuring of the findings. The findings showcased different approaches to data and overall themes in the institutional context in different regions, which included themes such as policies, administrative reforms, technology, interoperability, partnerships and transport data repository. The final discussion identifies two main development paths: technology-led development and other mobility concept-led development. All regions work actively with transport data management, although each builds their approach on different ideas and practices. The proactive role of the public sector in regulating and implementing new technologies is discussed for each of the urban regions. Partnerships between the public and private sectors are more developed in the urban regions with technology-led development. The study outlines key areas of future research, like the role of public authorities, the importance of public-private partnerships, questions related to the digitalization and interoperability.