This study analyzed the role of physical and functional characteristics of public open spaces in the case of Mehmet Akif (Dereboyu) Street, Nicosia. This study evaluated the different form of public open spaces such as streets and parks. Different types of streets affect on the urban design and usage. Mehmet Akif (Dereboyu) Street as the main street of Nicosia has the highest potential to be the best active and vital public open space in Nicosia generally and Northern Cyprus specifically. It is worth to mention that there are some deficiencies in the design and construction along the street which all mentioned in the recommendation part. Generally public spaces identify the culture and characteristics of the urban area through providing social interaction and human communications. Hence, public open spaces play an important and vital role in improving the social life alongside of city structure. Streets as the main components of the public open spaces as mentioned before, gather people for exchange of cultures, ideas, lifestyles entertaining and etc. Streets are the most useful part of public spaces during history. Different activities such as shopping, walking, sitting and greeting happen in streets. Streets are both for social activities and access. At the end of the study recommendation and future research paths is presented. Keywords: Public Open Space, Street, Mehmet Akif (Dereboyu) Street, Nicosia ; ÖZ : Bu calisma kamusal açık alan olarak sokaklari incelemektedir. Kibris’in baskenti Lefkosa’nin en onemli arterlerinden biri olan Mehmet Akif (Dereboyu) Caddesi, bu tezin calisma alani olarak secilmistir. Calismanin temel amaci, Mehmet Akif (Dereboyu) Caddesi’ni bir kamusal acik alan ele alarak, soz konusu sokagin fiziksel ve fonksiyonel ozelliklerini inclemektir. Bir alan calismasi olarak ele alinan bu arastirma, birinci ve ikincil kaynaklarin taranmasi ve alan analizlerini arastirma yontemi olarak kullanmistir. Problemin tanimi, amaclar ve metodolojinin tanitilmasinin ardindan, ikinci bolumde bir kamusal acik alan olarak sokak, kuramsal anlamda fiziksel ve fonksiyonel ozellikleri ile irdelenmis, ve alan calismasinin alt yapisi olusturulmustur. Bu altyapidan yola cikilarak ucuncu bolumde Mehmet Akif (Dereboyu) Caddesi, yine fiziksel ve fonksiyonel ozellikleriyle incelenmis, ve son bolumde calismanin genel bulgulari ilea di gecen sokak icin bazi oneriler sunulmustur. Anahtar kelimeler: Kamusal acik alan, sokak, Mehmet Akif (Dereboyu) Caddesi, Lefkoşa ; Master of Science in Architecture. Thesis (M.S.)--Eastern Mediterranean University, Faculty of Architecture, Dept. of Architecture, 2016. Supervisor: Prof. Dr. Şebnem Önal Hoşkara.