Numerous case studies and cameos were prepared of surface transportation PPP projects developed in the U.S. and in other countries as part of the overall study effort that produced this document. Each case study describes a PPP project in terms of its background, partnership arrangement, private and public partner roles and responsibilities, funding sources and financial arrangements, impediments incurred during the development and implementation of the project, strategies used to overcome them, and project results when completed.
These case studies and cameos provide useful insights into the variety of transportation projects that can be developed using PPP approaches and the variety of issues that can affect their potential for successful implementation. Appendix A provides a summary of the implications of a sampling of PPP projects developed in the United States in the past decade, based on the case studies and cameos contained in the companion report on U.S. PPP projects. Appendix A also provides a summary of implications of PPP projects developed in other countries over a longer timeframe, based on the case studies contained in the companion report on International PPP Projects.
The contents of Appendix A reveal the wide range of project results of using different PPP approaches and the importance of tailoring the project delivery approach to the project and its public-political-legal-institutional context. Exhibits 48 and 49 illustrate a number of the PPP projects documented in the companion case study reports from the U.S. and other countries, respectively. Exhibit 50 summarizes the critical success factors for transportation PPPs derived from the U.S. and international case studies and cameos documented in these reports.
Based on the lessons learned from prior PPP projects in the U.S. and other countries with more experience in using PPP approaches for transportation infrastructure delivery, Exhibit 51 summarizes the key ingredients to a successful PPP implementation.