How do the characteristics of the CBD create problems for town planners

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1)how do the characteristics of the CBD create problems for town planners (7)

If you are looking for the physical characteristics.

-Congestion can make navigation difficult
- Difficult to plan and construct critical and established road networks.
-Old CBD plans and designs may be difficult to adjust to suit a modern CBD.
-Topographical/ relief barriers such as hills can hinder planning and construction works. Surface conditions e.g weak sand soils, wetlands can also affect planning.

Phenomenons occurring in CBD
-Urbanisation can be difficult to deal with as more people move in the CBDs. Houses, roads etc needed will be difficult to calculate.
More people means urban sprawl may prove difficult to control.
-Growth of shanties/ illegal settlements in the CBD, e.g Mumbai can hinder planning. For example, areas to relocate displaced people
-Resistance to move/ relocate