Proposed sustainable infrastructure criteria for achieving sustainable development in Egyptian cities: Using integrated gray, green, blue infrastructure approaches

The approaches to the sustainable infrastructure are one of the tools to achieve the sustainability of the infrastructure, which aims to achieve sustainable development in urban communities. This research aims to determine the most appropriate sustainable infrastructure approaches for Egyptian cities, while defining the planning criteria for these approaches, through which it is possible to assess the sustainability of the infrastructure sector in Egyptian cities. The research found that the approach of integration between the approaches to the sustainable infrastructure (gray green - blue) is the most suitable approach to the sustainable infrastructure for the Egyptian case. It is commensurate with the specificity of the Egyptian case, through a set of research steps, which will be dealt with in detail within this research.