Introduction: The fast growing trend of urbanization in the past few decades has developed an idea suggesting that the city and its components are integral parts of human life today. Following the growing development of cities, poverty, expansion of social inequalities, environmental degradation, spread of pollution in urban areas, and the growth of social and cultural abnormalities, have caused the developing countries to face with numerous adverse crises of the fast growing globalization. This issue has made urban instability as one of the most challenging urban issues in twenty-first century.