Management of PPP project preparation process according to WEF (2013) is quite complex because it involves large team and multiple stakeholders such as ministries, regulatory organs and regulations, engineering firms, banks as well as multiple interfaces between different project functional feasibility studies. It is therefore very important at this stage to put together capable and experienced crossfunctional project team supported by committed political and project leadership in order to achieve a sustainable PPP project preparation process. The main feature of a PPP project preparation process includes; project planning, project coordination and project monitoring. This process according to Adamu et al. (2015) can be cost intensive, therefore the public sector needs to ensure sufficient upfront funding of the entire process. This study is aimed at assessing the effectiveness of road project preparation process in the development of road infrastructure under PPP concession. In order to achieve this aim, the study examined the concept of PPP models for infrastructure development and project preparation process in a PPP framework. Data collection was through administration of well-structured questionnaire on the target population. Data collected were analysed using both descriptive and inferential statistic analytical techniques. The study revealed that there is urgent need to review the current Nigeria National Policy on PPP, institutional structure and individual capacity building in the area of PPP project preparation in order to encourage more private sector participation in the drive for provision and development of road infrastructure facility.