4.    Walkable urban design    The physical environment characteristics  that make up the walkability index are potentially important candidate factors  (Owen et al., 2007) which make subtropical country such as Australia included a slightly different  item which is: “trees give shade” in the (NEWS)  (Cerin et al., 2013). Yet, that factor  was placed in the wrong section “Aesthetics”, because it is not a beauty  factor. In fact, Plant trees create  oxygen, shade/cool the environment (Eissa, 2012). Moreover, that is relevant to  the hot, dry climate because it will smooth the area, which could help people to  walk further.
5.   Public transport orientated development    Although  the advantage of a walkable environment, taking more trips by foot at the neighborhood scale  while still driving for work or other purposes at  the regional scale (Crane and Scweitzer, 2003) therefore, the planner should implement better transportation than a car, the bet has  the same advantage. The PRT (Personal Rapid  Transit) advanced technology allows for the full integration of walkability,  opportunity to create walkable transit-friendly environments by enabling more compact  and interconnected ways to move through space due to its small size and new  transit moment paradigm – point to point – providing service similar to a cab  (Murrell and Al-Qadi, 2011). Which  increase the connectivity. The Connectivity  is the directness and variety of routes to destinations, typically as a result  of grid patterns of interconnecting streets (Owen et al., 2007). In the other  hand, if planner increased densities then neighborhood  will have the potential to reducing the distance driven, encouraging more  walking (Rydin, 2011).  This can be achieved  through slowing down urban traffic and reallocating space to public transport,  through parking controls and road pricing, and through making it easier to use  public transport  (Banister, 2008).

Conclusion    

In conclusion,  The urban morphology of Doha,was developed considering walkability as the main mode of mobility and interaction among communities. Accordingly, certain physical qualities were deemed necessary for functional walkways. Walkways primarily provide access to adjacent amenities and allow travel on foot from one place to another within and throughout surrounding neighborhoods. The main qualities of good walkways are safety, offering warmth or sunlight when it is cool and shade and coolness when it is not, comfortable space for pedestrian traffic, and a healthy social atmosphere. Additionally, the best walkways are characterized by the transparency at the boundaries, where the public realm starts to be less public, often when a semi-private or a private property meets the walkway. In such instances, one can see or have a sense of what it is that defines the street and the public realm. In particular, one senses an invitation to view or get to know, even if only imaginatively, what is behind the walls surrounding the private spaces. This is where a sort of tension is formed between the public and the private realms.the role of urban planners to successfully achieve  a walkable, sustainable neighborhood at subtropical climate will be  possible but need careful thoughtful, and  long process because each neighborhood has its one size that (NEWS) can determine. Also,  each neighborhood has to be the right density with the 13 facilities. Moreover,  planner also should think about what beyond  the walking distance, how could people travel to another distant point. Furthermore, the social element has a significant  impact on how the neighborhood is felt by individuals  and planner have to think and ask people how to make it even better. Moreover, on top of all of that, the subtropical climate country are  developing fast with no reliable study about how to make their neighborhood sustainable  walkable.