Khanh Toan VUONG, Hanoi Architectural University, Faculty of Urban Management, Km10, Nguyen Trai, Thanh Xuan, Hanoi, Vietnam
Thai Huyen NGUYEN, Hanoi Architectural University, Faculty of Urban and Rural Planning, Km10, Nguyen Trai, Thanh Xuan, Hanoi, Vietnam

In the world, urban areas with relatively "closed" or "separate" patterns have been formed for a long time due to particular origin, culture, religion or traditional habits and/or to guarantee certain level of living conditions. These closed spaces gradually become more developed for a variety of reasons and conditions such as class, standard of living, security, scientific and technological development, etc. Not only in developed countries such as France, USA, but also in developing countries such as China, Vietnam, these secured housing areas, closed communities or those for the high class are becomes more and more popular providing comfortable living spaces for society or communities. But at the same time, it also increases the separation in social structure, in community interaction, especially in urban areas.