**6.2 Diversity**

It can be defined as the mixture of appropriate developments and development of options and differences between the usages in order to create livable places answering local needs. The usages offering diversity indicate how well a place is used, and it supports the economic and social activities in that place. The urban design criteria specified above are meaningful only when concretized. From this aspect, the design policy is an intermediary design instrument between the urban design criteria and the design instruments allowing the implementation of these criteria. The effective design policies do/should focus on how the urban design criteria can be achieved within a specific scope/context.

#### **6.3 Readability and definitiveness**

It can be defined as assisting the people in finding their way by making use of the definable roads and crossroads. The readability is always neglected; thus, it is very important to strengthen it because, in the design process, it is necessary to consider that not all the people are literate, and they do not get pleasure out of a place in the same way. Women and men, children and adults, visitors and inhabitants, old and young persons, and persons from different cultures perceive and interpret the same location in different ways. For this reason, a frame addressing all the perception styles is important.

#### **6.4 Continuity, closeness, coverage, and guidance**

It can be defined as improving the continuity of the street fronts and closeness of "places" via the advancements clearly defining the public and private places. The successful urban space is a field closed and defined by structures, buildings, and landscape components. Both relationships between the structures on a street and between street and structures are an indicator of it. The buildings following the general structure lines define the street and strengthen the effect of the street. The advancements following the borders of street fronts might contribute to clearly distinguishing the public and private spaces.

## **6.5 Flexibility**

It can be defined as creating advancements answering to the social, technologic, and economic conditions changing in the course of time. The urban spaces should be adaptable for usage at different scales. The most successful spaces are those capable of changing under different conditions. From this aspect, the cities should be able to adapt themselves to the rise and collapse of industries and the change from residential to commercial areas, and the structures and infrastructures should show the same adaptation. Moreover, the spaces should allow diversity in usage under different conditions and in different seasons.

**Table 3.**

**338**

*Weights of the sub-criteria.*

*Sustainability in Urban Planning and Design*
