Transportation infrastructure is an essential component of our physical environment. This article is primarily about investigating public-private partnership in motorways in order to understand the potential for its application, improvement, and secondarily about comparing public-private partnership in transportation sector in United Kingdom and Poland. The research takes a qualitative approach focusing on the process of project organisation, financing, realisation and functioning. The governance process is analysed to define main actors, the rules they interact with and their rationalities to participate in the project. This analysis includes locality-specific regulations review, literature study, case study documentation investigation and finally interviews with key informants. The case studies analysis is undertaken against the background of a survey of public-private partnership in transportation in UK and Poland. The results of the study can be useful for public managers and private investors. The main conclusion of the research is that the different countries, different legal and financial determinants lead similarly to public-private cooperation, however the detailed solutions have been different.