At Present, the total utilizable area of space under highway or expressway as in figure 1 in the Bangkok Metropolitan region is 4,641,476 square meters (Expressway Authority of Thailand, 2562). This area has been defined in many different ways as a lost space, waste space, dead space, and urban void. However, these neglected abandoned areas share some common aspects, often referred to a fraction of neglected, unutilized or useless area of a city that has different physical characteristics from the surroundings and the city’s overall areas. These abandoned areas look different from the public open space, such as parks, walking streets, and footpaths which are empty spaces outside buildings and their coverings, serving as useful spaces for public activities for different groups of people in the city. The significant reason of these abandoned areas is the spread of transportation network quantitatively and qualitatively, which results from the city's growth. The greater the city has expanded, the more expanded of transportation network will likely be from the city’s original areas in order to connect between areas of the city or between cities more efficiently. Nevertheless, these elevated transport structures overlap on the city’s original areas, which are often the city’s public areas, historic districts or commercial communities. As a result, the areas below became deserted useless areas which have led to several problems such as the deterioration of areas, the occupation of homeless people, and unsafety for pedestrians all of which cause negative impacts on the environment both at the community and the city levels