Provides an assessment of public/private partnerships (PPP), the challenges they face, & their potential within the nation's transport. system. Included are examples that highlight activities in various transport. modes & the lessons they demonstrate. This report draws these conclusions: (1) PPP in transport. have had modest success as compared to other public policy agendas. (2) The success of PPP is limited by factors such as divergent motivations, limited resources, legal constraints, & changing agendas. (3) Additional efforts are needed to leverage existing R&D investments & build new ones, possibly as part of the overall R&D investment environment.Leonard, Barry is the author of 'Public/Private Partnerships Implications for Innovation in Transportation' with ISBN 9780788186929 and ISBN 0788186922.