transformed into a semi-lattice system. Nevertheless, a lot of current cities still maintain the tree system character: road hierarchy and specialization, urban zoning and functional segregation. Therefore, we are dealing with fragmented cities, where the urban elements, functions and scales are not interrelated. One of the paradigmatic examples of this type of urban organization is a case of Minsk, Belarus. It was almost completely destroyed after the World War II and rebuilt under the Modern Movement concepts. According to the new general plan, it was established a new urban model based in a radio-central system with high functional road hierarchy and strict zoning. Currently, the urban structure of Minsk consists in three road rings, which establish in the hierarchical order the urban areas depending on the distance from the city center. In the same time, it is paid a lot of attention in developing of the continuous green system that is configured by the fluvial corridors of the city. The urban self-sufficient fragments are composed according to the road and green areas structure and based in the “microraion” urban scheme built by residential blocks. In other words, the city structure is organized according to the pyramidal order: all its urban elements (road system, green corridors, residential and industrial fragments, urban centers) are hierarchically organized according to the paper that they play in the city structuring [fig.1]. In particular, this urban organization is found in the residential fragments where the empty interstitial space has a structural role but do not generate any kind of urbanity. As a result, it is challenging to overcome physical segregation and urban and visual discontinuity between adjacent areas. These interstitial spaces are fruits of the urban proposals: “…that work as a collection of autonomous buildings (urban fragments) that share a common ground that organizes the site” [1; pp. 169]. In this way, the urban fragment presents a sum of the isolated parts of the cities.
Figure 3. The scheme of the fragmented urban structure of Minsk, developed by author