###### Abstract  
This paper is intended to improve the performance of signalized intersections, one of the most important systems of traffic control explained within the scope of smart transportation systems. These structures, which have the main role in ensuring the order and flow of traffic, are alternative systems depending on the different methods and techniques used. Determining the operation principles of these systems requires an extremely careful and planned study, considering their important role. Performance outputs obtained from the queue analyses made in previous studies formed the input of this study. The most important techniques are used in the effective control of intersections, such as signal timing: in particular, the use of effective green time and order of the transitions between phases. In this research, a traffic-sensitive signalized intersection control system was designed with the suggested methods against these two problems. The sample intersections were selected from three cities with the highest population density as the case study area. In the analysis of the performance of the connection arms of the selected intersections, flow intensity data were taken into consideration, as well as the arrival and service rates. Based on this, the outputs of the two proposed models regarding the use of phase transitions and effective green durations were compared with two other adaptive control systems and their positive results were shared. The results showed that signalized intersections, operating with a well-planned and correctly chosen technique, better regulate density and queuing. s 2021 22 May 2021 22 May 2021 2  
this field to develop the smart city concept and improve living standards. Especially as a result of studies on city residents, research is carried out to determine the indicators that make up the smart city concept [1]. The smart city model, which comprises the collaboration of technology and city management processes, affects many environmental factors. This model has begun to be used in many areas, such as health, education, energy, accommodation, infrastructure, agriculture, environment, and especially in transportation. There are many environmental and economic benefits of reducing traffic congestion and density, such as the reduction in the time wasted in transportation, the reduction in traffic accidents, and increased efficiency of fuel consumption. Transportation systems are important components in terms of social and living standards that can directly improve people's life quality and make a difference in industrial activities in a sectoral sense. Intelligent Transportation Systems, which stand out in this context, are some of the areas where cities invest the most in terms of technology and infrastructure [2]. Applications developed or likely to be improved in the transport context and their possible benefits formed the basic idea of this article study. Traffic management, which has become the most important problem of cities, especially as a result of increasing urbanization and population density shifting from rural areas to cities, came to the fore as the starting point of the study. In this context, many factors are presented as the main aspect of urban traffic management. Studies such as observations, interviews, and literature reviews have concluded that the problem is especially at the intersections of urban connection roads. Intersections are the most basic infrastructure element designed and implemented by city planners over many years to manage traffic at these points [3]. Signalized intersections and traffic lights, which are the main urban traffic regulatory controls, are especially used at the intersections of connection roads coming from more than one direction. The travel times of vehicles in urban traffic can be prolonged due to insufficient traffic light control. These waiting points and queues that may be experienced affect more than one intersection or transition route.