Sürdürülebilir Kalkınma Amaçları

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• MakaleAçık Erişim2022Scopus SJRQ3/r/bayburt/12105
  Design of an efficient vehicle-actuated signal control logic for signalized intersections

  Cakici, Ziya; Murat, Yetis Sazi; Aydin, Metin Mutlu

  The effectiveness of fixed-time management systems dramatically decreases in case of fluctuating traffic demands in signalized intersection approaches. The result is the utter waste of time in traffic to be followed by material, psychological, and ecological problems. In recent years, to minimize the negative impacts of these problems, many researchers have focused on Intelligent Transportation Systems (ITS). As it is known, one of the applications of ITS is called vehicle-actuated (traffic-actuated) management systems. Because the success of these types of applications is directly related to the created control logic, the selection of the most proper control parameters for the created control logic is an important issue. This study aims to create an effective control logic and flow chart for the vehicle-actuated management system. At the end of the analyses, it is seen that the created vehicle-actuated management system can adapt to fluctuations in traffic demands in signalized intersection approaches. Average vehicle delays, fuel consumptions, and exhaust emissions can be reduced significantly by the created system. In case of fluctuations in traffic demands in intersection approaches, it is concluded that the performance of the intersection may increase enormously because of the created vehicle-actuated management system.

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  AtıfScopus4·WoS6·OpenAlex7

  İncele
• MakaleAçık Erişim2021Scopus SJRQ4/r/bayburt/14613
  Sinyalize Dönel Kavşaklarda Diferansiyel Gelişim Algoritması ile Sinyal Süre Optimizasyonu

  Murat, Yetis Sazi; Cakici, Ziya

  “Vakit” in “Nakit” ten daha değerli olduğunu her fırsatta dile getiren insanoğlu, günlük hayatta, zamanının büyük bir bölümünü de trafikte harcamaktadır. Özellikle sinyalizasyon sistemi ile kontrol edilen kavşaklarda meydana gelen yüksek düzeyli zaman kayıpları, yakıt tüketimleri, gürültü kirlilikleri vb. psikolojik, ekonomik ve çevresel problemleri de beraberinde getirebilmektedir. Karşılaşılabilecek olası problemler ise yalnızca doğru ve güçlü bir matematiksel altyapıya sahip olan denetim stratejileri ile en aza indirilebilmektedir. Bu çalışmada, sinyalize dönel kavşakların performanslarının arttırılması amacıyla, kavşaktaki ortalama taşıt gecikmesinin minimize edilmesini hedefleyen bir sinyal süresi optimizasyonu modeli oluşturulmuştur. Oluşturulan modelde, fazlara ait sinyal süreleri ve devre süresi Diferansiyel Gelişim Algoritması kullanılarak optimize edilmiştir. Çalışma kapsamında, modelin etkinliği, Denizli Kelleci Kardeşler Kavşağı’ndan 4 farklı zaman periyodunda toplanan gerçek trafik verileri kullanılarak VISSIM simülasyon programında test edilmiştir. Sonuç olarak, söz konusu model ile ortalama gecikmelerin, kavşaktaki mevcut duruma kıyasla yaklaşık %45’ e kadar azaltılabileceği belirlenmiştir.

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  AtıfOpenAlex8·TR Dizin5

  İncele
• MakaleAçık Erişim2019Scopus SJRQ3/r/bayburt/13922
  A Differential Evolution Algorithm-Based Traffic Control Model for Signalized Intersections

  Cakici, Ziya; Murat, Yetis Sazi

  Sustainable management of traffic flows at signalized intersections is an important issue in terms of traffic engineering. The minimization of lost time, emission, fuel consumption, etc., can be achieved by optimization-based intersection management. In this study, a new traffic signal control model is developed for the management of three-leg signalized intersections. In the proposed model, signal timing and signal phasing are optimized simultaneously using Differential Evolution (DE) algorithm which is one of the population-based metaheuristic algorithms. The effectiveness of the model is tested on sample traffic scenarios with VISSIM simulation software considering average vehicle delay performance criteria. Results show that the proposed approach may reduce the average vehicle delay between the rates of 28%-42% and 3%-38% comparing to the optimum fixed-time signal control and vehicle-actuated signal control for tested scenarios, respectively.

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  AtıfScopus39·WoS37·OpenAlex39

  İncele
• MakaleAçık Erişim2019Scopus SJRQ3/r/bayburt/13769
  A signal timing assignment proposal for urban multi lane signalised roundabouts

  Murat, Yetis Sazi; Cakici, Ziya; Tian, Zong

  The relationship between the left-turning traffic volume and the storage area at signalised roundabouts is investigated, and a calculation procedure for signal timing is proposed in this paper. The parameters associated with the developing stages of a new expression/ model are also defined. Four different signal timing scenarios are considered. The results show that the proposed formula can be used for the design of signalised roundabouts.

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  AtıfScopus11·WoS7·OpenAlex9

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