The growth of  cities experienced during the last two decades continue with specific urbanization characteristics unique to each geographical area. In Africa, urbanization is largely characterized by a high concentration of  people in the capital cities, while metropolitan expansion in Asia is taking place with populations shifting to satellite cities or sub-urban areas. In addition to the rapid growth of  small cities, migration from one city to another, and the continuing trend of  rural-urban migration urge development decision makers and practitioners to acknowledge the fact that the 21st century is the “Century of  the City”.