Public involvement is essential to building locally responsive research policies on data sharing, but little research has involved stakeholders to create quality and value of single infrastructure projects. Meanwhile, Polish and foreign local market experience show that the lack of all stakeholders and their relations' consideration can badly affect the success of infrastructure project realization. The main aim of this paper is to point out how to fill the gap between theoretical and practical knowledge in that issue by designing proper stakeholder analysis.

Between November and December 2015, a qualitative study as a part of scientific project, entitled "Innovative Model of Social-Economical Benefits and Costs for Infrastructural Projects" was conducted. It involved infrastructure project experts with varying experiences of research in a deliberative process to explore views on benefits and challenges in research relating data sharing. In-depth interviews and extended small group discussions based on information sharing and facilitated debate were used to collect data. Data were analysed using the Framework Analysis, charting flow and dynamics in debates.

The findings highlight both the opportunities and challenges of communicating about this complex and relatively novel topic for many stakeholders. According to experts, the impact of stakeholders mainly depends on the development and implementation of appropriate trustbuilding processes, linked to local perceptions of benefits and challenges. Thus, important ways of building trust in data sharing include involving the public in infrastructure development and implementation, promoting collaborations around data sharing and building close partnerships between researchers and business environment to provide checks and balances on data sharing, and promote near and long-term benefits.