PPP analysts and stakeholders have identified several potential benefits of transportation PPPs for the public sector and the public interest, as well as potential concerns and controversies. State policymakers may find it helpful to become familiar with these potential benefits and concerns, since they have arisen in many public debates about PPPs in the United States. An important caveat here is that, in general, the advantages of PPPs are realized only when the public sector takes a careful and well-informed approach to enabling legislation, project analysis and selection, procurement, contracting, and long-term contract management and oversight. Some identified concerns may be averted in the same way.30 Guidelines for how state legislators may help secure the benefits of PPPs-and address some of the related concerns-are discussed in depth in the Principles section starting on page 21.