Browsing by Author "Albdairi, Mustafa"

Now showing 1 - 5 of 5

Citation - WoS: 1
Citation - Scopus: 3
Assessing Traffic Performance: Comparative Study of Human and Automated Hgvs in Urban Intersections and Highway Segments
(Univ Tun Hussein onn Malaysia, 2024) Almusawi, Ali; Albdairi, Mustafa; Qadri, Syed Shah Sultan Mohiuddin
This study conducts a comparative analysis of traffic dynamics at urban signalized intersections and on highways, incorporating both human-operated and automated heavy goods vehicles (HGVs) using the PTV VISSIM simulation model. It examines the impacts of automated driving technologies on critical traffic performance metrics such as queue length, travel time, vehicle delay, emissions, and fuel consumption. Initial findings indicate that automation in HGVs enhances traffic flow, particularly by reducing queue lengths and vehicle delays. However, varying levels of automation from cautious to aggressive reveal complex trade-offs between operational efficiency and environmental impacts. On highways, automated HGVs demonstrate superior performance by reducing travel times and delays while increasing throughput compared to human-driven HGVs. These results underscore the operational benefits of automated HGVs under diverse traffic conditions and highlight their significant implications for transportation planning and policy-making. This research contributes valuable insights into the integration of automated technologies in transportation systems, facilitating informed decision-making for stakeholders considering the adoption of these advancements in the current infrastructure.
Dönel Kavşakta Artan Trafik Hacminin Otonom Araçlar Üzerindeki Etkisi
(2024) Almusawı, Alı; Albdairi, Mustafa
Bu çalışma, PTV VISSIM benzetim programını kullanarak, artan trafik hacimlerinin sürücülü araçlarla birlikte farklı davranış özelliklerine sahip otonom araçlar (AV'ler) üzerindeki etkisini araştırmayı amaçlamaktadır. Benzetimler, 100 ile 600 araç arasındaki çeşitli trafik yoğunluklarını içermekte ve seyahat süreleri, emisyonlar (CO, NOX, VOC) ve yakıt tüketimi üzerindeki etkilerini ölçmektedir. Sonuçlar, AV'lerin yayılım oranlarının artmasıyla birlikte genellikle seyahat sürelerinin azaldığını göstermektedir; agresif AV'ler en kısa süreleri elde ederken, bunu normal ve ardından dikkatli AV'ler takip etmektedir. Emisyonlar ve yakıt tüketimi de AV'lerin yayılım oranı arttıkça azalma eğilimi göstermektedir. Özellikle, agresif AV'lerin seyahat süresini azaltmada etkili olduğu, normal AV'lerin verimlilik ve azalan emisyonlar arasında tutarlı bir denge sağladığı ve dikkatli AV'lerin güvenlik ve düşük emisyonları vurguladığı görülmektedir. Davranış özelliklerindeki farklılıklara rağmen, tüm AV türleri geleneksel araçlara kıyasla belirgin bir iyileşme sergilemektedir. Her yayılım oranında, AV'ler daha kısa seyahat süreleri ve daha düşük emisyonlara yol açmaktadır; agresif AV'ler en verimli olurken, bunu normal ve ardından dikkatli AV'ler takip etmektedir. Bu bulgular, otonom araçların ulaşım ağlarına entegre edilmesinin potansiyel faydalarını vurgulamaktadır. Bu durum, hedeflere ve koşullara bağlı olarak AV davranışlarının optimize edilmesinin, daha verimli ve çevre dostu trafik sistemlerinin oluşmasına olanak tanıyabileceğini öne sürmektedir. Çalışma, her bir AV davranışının farklı güçlü yönlerinden yararlanarak otonom ulaşım için daha sürdürülebilir ve verimli bir gelecek yaratmayı amaçlayan politika yapıcılar, şehir planlamacıları ve araştırmacılar için değerli içgörüler sunmaktadır.
Citation - WoS: 0
Citation - Scopus: 5
Integrating Autonomous Vehicles (Avs) Into Urban Traffic: Simulating Driving and Signal Control
(Mdpi, 2024) Almusawi, Ali; Albdairi, Mustafa; Qadri, Syed Shah Sultan Mohiuddin
The integration of autonomous vehicles into urban traffic systems offers a significant opportunity to improve traffic efficiency and safety at signalized intersections. This study provides a comprehensive evaluation of how different autonomous vehicle driving behaviors-cautious, normal, aggressive, and platooning-affect key traffic metrics, including queue lengths, travel times, vehicle delays, emissions, and fuel consumption. A four-leg signalized intersection in Balgat, Ankara, was modeled and validated using field data, with twenty-one scenarios simulated to assess the effects of various autonomous vehicle behaviors at penetration rates from 25% to 100%, alongside human-driven vehicles. The results show that while cautious autonomous vehicles promote smoother traffic flow, they also result in longer delays and higher emissions due to conservative driving patterns, especially at higher penetration levels. In contrast, aggressive and platooning autonomous vehicles significantly improve traffic flow and reduce delays and emissions. Mixed-behavior scenarios reveal that different driving styles can coexist effectively, balancing safety and efficiency. These findings emphasize the need for optimized autonomous vehicle algorithms and signal control strategies to harness the potential benefits of autonomous vehicle integration in urban traffic systems fully, particularly in terms of improving traffic performance and sustainability.
Citation - WoS: 0
Citation - Scopus: 0
Integrating Recycled Asphalt Pavement and Warm Mix Additives for Enhanced Performance and Reduced Emissions in Asphalt Mixtures
(Elsevier, 2025) Viktorovich, Gladyshev Nikolai; Almusawi, Ali; Shoman, Sarmad; Lupanov, Andrei P.; Albdairi, Mustafa
This research explores the effects of integrating recycled asphalt pavement (RAP) with various warm mix asphalt (WMA) additives on the production and performance of asphalt concrete mixtures. The main goal is to improve these mixtures' mechanical properties and environmental sustainability by decreasing the production temperature and reducing harmful emissions. The WMA additives tested-CCBit 113 CE, Rediset WMX 8017, Evotherm J-1, Sylvaroad RP1000, ZycoTherm, Amphoteric type DAD-1, and Adgezol 3-TD-vary in composition, including wax-based, amide-based, polyol ether, and surfactant additives, each influencing asphalt properties differently. Laboratory experiments evaluated enhancements in density, compressive strength, water resistance coefficient, and water saturation. The findings show that these additives significantly boost the mechanical properties of asphalt concrete and lower production temperatures by 40-50 C, reducing it from 145 to 155 C to 100-110 degrees C and consequently decreasing emissions of harmful substances like carbon monoxide. Furthermore, the study features a field performance evaluation in partnership with industry collaborators at a pilot section on Yegoryevskoye Highway, Moscow, Russia. This thorough assessment confirms the practicality and advantages of combining RAP and WMA additives in asphalt concrete production, offering a sustainable approach to road construction.
Citation - WoS: 0
Citation - Scopus: 0
Viscoelastic and Fatigue Performance of Modified Bitumen Using Polymer and Bio-Based Additives: a Comparative Study
(Mdpi, 2025) Almusawi, Ali; Nasraldeen, Shvan Tahir; Albdairi, Mustafa; Norri, Hussein H.
This study investigates the performance and viscoelastic characteristics of unmodified and modified bitumen using Performance Grading, Frequency Sweep, and Linear Amplitude Sweep tests. The bitumen modifications include styrene-butadiene-styrene at 4% and 5%, animal bone powder at concentrations of 4%, 5%, and 6%, and waste cooking oil at 3%, 4%, and 5%. Performance Grading tests were conducted to evaluate the high-temperature performance of bitumen samples. Frequency Sweep tests were used to analyze the complex shear modulus and phase angle, providing insights into stiffness and elasticity. The Linear Amplitude Sweep tests assessed fatigue resistance by monitoring the degradation of the complex shear modulus under cyclic loading. Styrene-butadiene-styrene and animal bone powder significantly enhanced stiffness, elasticity, and fatigue resistance, with styrene-butadiene-styrene-modified samples achieving the highest performance grades and fatigue resistance. Waste cooking oil-modified bitumen reduces stiffness and fatigue resistance, indicating it primarily acts as a plasticizer. Styrene-butadiene-styrene and animal bone powder are effective modifiers for improving bitumen's mechanical and fatigue properties and are suitable for demanding applications. In contrast, waste cooking oil compromises structural performance despite its environmental benefits, making it less suitable for high-performance use.