Most of the traditional cities are relatively unplanned - they have simply appeared naturally by people who were building near each other, copying the patterns they saw elsewhere
Traditional architecture is the essence of the culture and experience of society, which has benefited from feedback to adapt to and harmonize with the environment, deeply settled in the subconscious of society.
"Trial and error" and experience whether, Lead to feedback as a result of that experience. Traditional architecture has taken a long period of time to adaptable than .contemporary architecture ,Which despite the use of science and the correct approach, but did not have time to benefit from feedback.