Adequate infrastructure is essential to economic growth. Investments in transportation and infrastructure systems such as roads, ports, railways, waterways and utilities, provide the foundation for economic development. But the capital available to provide that infrastructure is always limited, and subject to many competing demands. Regardless of whether funds are provided by the public or the private sector, careful analysis and evaluation of infrastructure projects is essential if that scarce capital is to be wisely allocated. There are two main perspectives from which this analysis and evaluation may be undertaken: (a) an economic perspective, in which the focus is on the overall impact on the material well-being of the society as a whole, (b) a financial perspective, in which the focus is on the monetary return to the proponent of the project.