Thus, in order to recognize the significance of their benefits and multiplier effects, project planning for infrastructure needs to consider the following public policy aspects: (a) public goods, (b) spillover effects, (c) time horizon of the project cycle, (d) project partnership, and (e) national policy frameworks. This also requires that appropriate governance structures are in place, especially in procurement processes, to enhance the impact of private sector investment in developing sustainable infrastructure. Indeed, the efficiency-adjusted approach demonstrates that the productive capacity of public capital has largely been underestimated when employing traditional methods to measure the role of public capital stock (Gupta and others, 2014). Similarly, evidence also emphasizes the efficiency of public investment as (efficiency-adjusted) public capital is a significant contributor to growth (Gupta and others, 2014, IMF, 2014).