"Integrating infrastructure is a giant leap on the continuum towards deeper regional integration, allowing for better economies of scale and the development of cross-border public goods. Transport corridors (road and rail), airports and seaports link countries physically, politically and economically, and also provide global market access. Transport infrastructure is often linked to other regional infrastructure projects in energy, communications, and water and sanitation. The political-economy perspective considers how various players influence the national and regional decision-making context, and what impact their actions (or lack of action) have on the integration agenda."