"How do socio$-$economic factors influence the spatial distribution of urban infrastructure in developing countries, and what are the implications for sustainable development? Consider the interplay between historical legacies, political power dynamics, and planning policies in shaping the allocation of resources for infrastructure development. Discuss the role of government interventions, private sector investments, and community participation in addressing disparities in access to essential services such as water, sanitation, transportation, and healthcare. Analyze case studies from diverse geographical contexts to illustrate the complex interactions between socio$-$economic variables and infrastructure provision, and propose strategies for promoting equitable and sustainable urban development in the face of rapid urbanization and population growth."