While more commonly accepted for other forms of infrastructure, such as drinking water supply, solid waste disposal, and airport infrastructure, private-sector financial participation in surface transportation infrastructure has attracted the keen attention of policy makers, as evidenced by a recent report of the Government Accountability Office that focused on appropriate measures to protect national public interest.11 The Commission believes there is no single overarching answer to the question of the appropriateness of private- sector financial participation. Each project's specific circumstances will determine the suitability of private-sector involvement in various aspects of project delivery, operations, and financing. This section outlines some of the potential advantages and disadvantages of such involvement and suggests Pest practices and appropriate public oversight measures to mitigate the key public policy concerns in this area.12