This chapter focuses on the urban infrastructure, including water supply and wastewater distribution, waste management, energy supply, public transport and road network. It discusses major social infrastructure, including hospitals and medical clinics, schools and tertiary education, cultural hubs and affordable housing. Social and urban infrastructure includes the basic facilities, services and installations needed for the functioning of a community or society, such as transportation and communications systems, water and power lines, and public institutions, including schools, post offices and community centres. The critical elements of the urban infrastructure include water supply, sewerage, waste collections, electricity and gas supply, the road network system, the public transport system and telecommunications, including the internet. The Urban Guidelines for Kuala Lumpur City Centre identified poor pedestrian connectivity between major activity nodes of the central city. The Green Building Index Township rating system addresses energy efficiency in urban townships and districts.