Mehmet Ali SILGU
@itu.edu.tr
Scopus Publications
- Impacts of Car-Following Models on Simulation-Based Safety Evaluation of Freeways
Sadullah Goncu, Mehmet Ali Silgu
Arabian Journal for Science and Engineering, 2026 - Robust Gain-Scheduled Continuous-Time Linear Quadratic Regulator for Mixed-Traffic Freeways: A Multi-Class Cell Transmission Model Approach
Sadullah Goncu, Mehmet Ali Silgu, Hilmi Berk Celikoglu
IEEE Transactions on Intelligent Transportation Systems, 2026 - State of the Art: Route Choice Decisions in Transportation Systems
Özger Inal, Mehmet Ali Silgu, Abdullah Hilmi Lav
Arabian Journal for Science and Engineering, 2026
Route choice has traditionally been regarded as a fundamental decision-making process aimed at minimizing individual travel costs within transportation systems. However, increasing network complexity, heterogeneous user preferences, and the widespread use of advanced information technologies have transformed route choice into a multidimensional problem closely associated with environmental sustainability, infrastructure efficiency, and overall social welfare. Consequently, route choice is no longer limited to time- or distance-based preferences but represents a dynamic decision-making process shaped by multiple interacting factors. Although the existing literature extensively examines economic costs, engineering constraints, environmental impacts, behavioral responses, investment considerations, and regulatory frameworks, these determinants are often analyzed in isolation. The absence of a comprehensive synthesis integrating these factors within a unified analytical perspective represents an important gap in the literature. Motivated by this limitation, this study provides a structured and interdisciplinary review that synthesizes the principal determinants influencing route choice decisions. The findings indicate that route choice cannot be explained solely by rational cost minimization. Instead, user heterogeneity, trust in information systems, environmental risks, and institutional mechanisms play a critical role in shaping route choice behavior. By consolidating fragmented findings into an integrated conceptual framework, this study provides a comprehensive reference for future research on behavioral modeling, eco-routing strategies, infrastructure investment evaluation, and evidence-based transportation policy design. - Reinforcement Learning-Based Freeway traffic Control Concerning Emissions
Sadullah Goncu, Mehmet Ali Silgu, Hilmi Berk Celikoglu
Transportation Research Procedia, 2026
This study presents a reinforcement learning based framework involving the integrated use of ramp metering (RM) and variable speed limit (VSL) control towards the ultimate aim of mitigating traffic congestion and emissions. Traditional freeway traffic control strategies often fail to adapt dynamically to evolving traffic conditions, resulting in suboptimal performance. The proposed framework seeks, through simulation, the optimal setting of VSL and RM actions by leveraging RL. The learning-based architecture we have designed is trained and tested using data from a hypothetical freeway network piece and synthetic demand profiles. The performance of the framework is evaluated by considering multiple traffic demand levels and connected and automated vehicle penetration rates. - Hydrogen in Transportation
Mohammad Danish, Mohd Sadat, Syed Aqeel Ahmad, Mehmet Ali Silgu
Hydrogen Energy Systems Advancing Sustainable Power Solutions, 2026
The transportation sector is a major contributor to global emissions, necessitating a shift toward sustainable energy sources. Hydrogen has emerged as a promising alternative fuel, offering zero emissions and high energy efficiency. This paper explores the role of hydrogen in transportation, focusing on its adoption in freight transport, business models for hydrogen producers and refueling station owners, and policy frameworks supporting its integration. Various studies highlight strategies for hydrogen deployment in different regions, including China, Sweden, and the Nordic countries, with an emphasis on decarbonization, market acceptance, and infrastructure development. Key challenges such as hydrogen production, storage, transportation, and fuel cell advancements are also discussed. Additionally, the paper examines the economic and environmental implications of hydrogen as a transportation fuel, including the potential of green hydrogen from renewable sources and biomass-based hydrogen production. By analyzing global trends, technological advancements, and policy initiatives, this study provides insights into the feasibility of hydrogen as a sustainable transportation fuel and its role in the transition toward a low-carbon future. - Reinforcement Learning Controlled Variable Speed Limits in Urban Expressway Mixed Traffic
Alfayez Ahmad, Mohd Sadat, Syed Aqeel Ahmad, Shrish Bajpai, Mehmet Ali Silgu
2026 6th International Conference on Multimedia Signal Processing and Communication Technologies Impact 2026, 2026
Increase in Rapid urbanization has intensified traffic congestion, delays, and emissions on urban expressways, revealing the limitations of conventional control strategies. This study aims to develops a Reinforcement Learning (RL) based Variable Speed Limit (VSL) control framework using a Deep QNetwork (DQN) implemented in the Simulation of Urban Mobility (SUMO) environment to enhance traffic efficiency at an expressway merging section. Traffic data used was collected using a video camera recorder and radar speed gun, with vehicle trajectories extracted through the Traffic Data Extractor developed by IIT Bombay. The model implemented was calibrated and validated using field observations from two sitesone representing uninterrupted flow and the other in an onramp merging area. The simulation compared three configurations: a baseline case without control, a conventional rule-based VSL controller, and the proposed DQN-based VSL approach and the findings reveal that the DQN agent achieved a 18.8% reduction in total travel time compared to the baseline, while the rule-based VSL controller worsened performance by 21.7%. The learning-based controller effectively mitigated congestion, reduced shockwave formation, maintained higher average speeds, and improved travel time reliability under dynamic and stochastic traffic conditions demonstrating that a reinforcement learning-driven VSL system can significantly enhance both traffic flow efficiency and user-level reliability, outperforming traditional heuristic control strategies on urban expressways. - Traffic Congestion in Routing Problems: Insights from Autonomous Mobility-on-Demand and Shared Ride Systems
Hazal Akova, Sadullah Göncü, Mehmet Ali Silgu, Hilmi Berk Celikoglu
Arabian Journal for Science and Engineering, 2025 - Multi-objective Optimization Framework for Trade-Off Among Pedestrian Delays and Vehicular Emissions at Signal-Controlled Intersections
Görkem Akyol, Sadullah Göncü, Mehmet Ali Silgu
Arabian Journal for Science and Engineering, 2024
Traffic congestion has several adverse effects on urban traffic networks. Increased travel times of vehicles, with the addition of excessive greenhouse emissions, can be listed as harmful effects. To address these issues, transportation engineers aim to reduce private car usage, reduce travel times through different control strategies, and mitigate harmful effects on urban networks. In this study, we introduce an innovative approach to optimizing traffic signal control settings. This methodology takes into account both pedestrian delays and vehicular emissions. Non-dominated sorting genetic algorithm-II and Multi-objective Artificial Bee Colony algorithms are adopted to solve the multi-objective optimization problem. The vehicular emissions are modeled through the MOVES3 emission model and integrated into the utilized microsimulation environment. Initially, the proposed framework is tested on a hypothetical test network, followed by a real-world case study. Results indicate a significant improvement in pedestrian delays and lower emissions. - A Framework for Evaluating the Safety and Homogenizing Effect of Freeway Traffic Controllers on Mixed Traffic Conditions
Mehmet Ali Silgu
Arabian Journal for Science and Engineering, 2024 - A Bi-Objective Traffic Signal Optimization Model for Mixed Traffic Concerning Pedestrian Delays
Gorkem Akyol, Mehmet Ali Silgu, Sadullah Goncu, Hilmi Berk Celikoglu
Transportation Research Procedia, 2024
Urban traffic networks suffer in numerous ways from traffic congestion. Some of these adverse effects are increased travel times of cars, buses, bicycle users, pedestrians etc., with the addition of excessive greenhouse gas emissions. Transportation engineers and policy makers try to improve the quality of urban transportation systems by developing projects to enhance the pedestrian experience, reduce private car usage, reduce total time spent in the network through different control strategies, and diminish the detrimental effects. In this context, this study takes Connected and Automated Vehicles (CAVs) and pedestrians into account at signal-controlled intersections. A novel intersection signal control optimization methodology that incorporates pedestrian delays and vehicular emissions from CAVs is presented. Non-dominated sorting genetic algorithm-II is utilized to solve the multiobjective optimization problem. For the emission calculations, the MOVES3 emission model is utilized. The proposed framework is tested on real-world case study. Simulation experiments showed major improvements in pedestrian delays and lower emissions. - A Study on Environmental Impact of Slow Moving Electric Vehicles Using Microsimulation on Lucknow Urban Road With an On-Ramp
Mohd Sadat, Syed Aqeel Ahmad, Mehmet Ali Silgu, Shrish Bajpai, Digvijay Pandey
Environmental Health Insights, 2024 - Combined Control of Freeway Traffic Involving Cooperative Adaptive Cruise Controlled and Human Driven Vehicles Using Feedback Control Through SUMO
Mehmet Ali Silgu, Ismet Goksad Erdagi, Gokhan Goksu, Hilmi Berk Celikoglu
IEEE Transactions on Intelligent Transportation Systems, 2022 - Evaluation of Vehicle Assignment Algorithms for Autonomous Mobility on Demand
Sadullah Goncu, Mehmet Ali Silgu, Hilmi Berk Celikoglu
IEEE Intelligent Vehicles Symposium Proceedings, 2022 - Analysis on Effects of Driving Behavior on Freeway Traffic Flow: A Comparative Evaluation of Two Driver Profiles Using Two Car-Following Models
Sadullah Goncu, Ismet Goksad Erdagi, Mehmet Ali Silgu, Hilmi Berk Celikoglu
IEEE Intelligent Vehicles Symposium Proceedings, 2022 - A Methodology to Consider Explicitly Emissions in Dynamic User Equilibrium Assignment
Mehmet Ali Silgu, Ismet Goksad Erdagi, Selin Hulagu, Sercan Akti, Hazal Akova, Gorkem Akyol, Sadullah Goncu, Gokhan Goksu, Hilmi Berk Celikoglu
Lecture Notes in Computer Science Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics, 2022 - H State Feedback Controller for ODE Model of Traffic Flow
Mehmet Ali Silgu, İsmet Gökşad Erdağı, Gökhan Göksu, Hilmi Berk Çelikoğlu
IFAC Papersonline, 2021 - Integral Input-to-State Stability of Traffic Flow with Variable Speed Limit
Gökhan Göksu, Mehmet Ali Silgu, İsmet Gökşad Erdağı, Hilmi Berk Çelikoğlu
IFAC Papersonline, 2021 - A Game-Theoretical Approach for Lane-Changing Maneuvers on Freeway Merging Segments
Sercan Akti, Ismet Goksad Erdagi, Mehmet Ali Silgu, Hilmi Berk Celikoglu
2020 IEEE 23rd International Conference on Intelligent Transportation Systems ITSC 2020, 2020 - Analysis on Pedestrian Green Time Period: Preliminary Findings from a Case Study
Mehmet Ali Silgu, Gorkem Akyol, Hilmi Berk Celikoglu
Lecture Notes in Computer Science Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics, 2020 - Analyzing Network-Wide Effects of Cooperative Adaptive Cruise Control Without Traffic Signal Control at Intersections
Mehmet Ali Silgu, Ismet Goksad Erdagi, Hilmi Berk Celikoglu
Lecture Notes in Computer Science Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics, 2020 - Network-wide emission effects of cooperative adaptive cruise control with signal control at intersections
Mehmet Ali Silgu, İsmet Gökşad Erdağı, Hilmi Berk Çelikoğlu
Transportation Research Procedia, 2020 - Adaptive Signal Control to Enhance Effective Green Times for Pedestrians: A Case Study
Gorkem Akyol, Ismet Goksad Erdagi, Mehmet Ali Silgu, Hilmi Berk Celikoglu
Transportation Research Procedia, 2020 - Pedestrian-friendly traffic signal control using eclipse sumo
Görkem Akyol, Mehmet Ali Silgu, Hilmi Berk Çelikoğlu
Epic Series in Computing, 2019 - Emission effects of cooperative adaptive cruise control: A simulation case using sumo
İsmet Gökşad Erdağı, Mehmet Ali Silgu, Hilmi Berk Çelikoğlu
Epic Series in Computing, 2019 - Approximation of Emission for Heavy Duty Trucks in City Traffic
Mehmet Ali Silgu, Kenan Muderrisoglu, Ahmet Halit Unsal, Hilmi Berk Celikoglu
2018 IEEE International Conference on Vehicular Electronics and Safety Icves 2018, 2018 - A Comparative Performance Analysis of Variable Speed Limit Systems Control Methods Using Microsimulation: A Case Study on D100 Freeway, Istanbul
Mohd Sadat, Ismail M. Abuamer, Mehmet Ali Silgu, Hilmi Berk Celikoglu
Lecture Notes in Computer Science Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics, 2018 - Analyzing the effects of driver behavior within an adaptive ramp control scheme: A case-study with ALINEA
Ismail M. Abuamer, Mohd Sadat, Mehmet Ali Silgu, Hilmi Berk Celikoglu
2017 IEEE International Conference on Vehicular Electronics and Safety Icves 2017, 2017 - Editorial
Hilmi Berk Celikoglu, Abdullah Hilmi Lav, Mehmet Ali Silgu
Transportation Research Procedia, 2017 - Micro-simulation based ramp metering on istanbul freeways: An evaluation adopting ALINEA
Ismail M. Abuamer, Mehmet Ali Silgu, Hilmi Berk Celikoglu
IEEE Conference on Intelligent Transportation Systems Proceedings ITSC, 2016 - Bee Colony Optimization for innovative travel time estimation, based on a mesoscopic traffic assignment model
Mauro Dell’Orco, Mario Marinelli, Mehmet Ali Silgu
Transportation Research Part C Emerging Technologies, 2016 - Extension of traffic flow pattern dynamic classification by a macroscopic model using multivariate clustering
Hilmi Berk Celikoglu, Mehmet Ali Silgu
Transportation Science, 2016 - Clustering traffic flow patterns by fuzzy c-means method: Some preliminary findings
Mehmet Ali Silgu, Hilmi Berk Celikoglu
Lecture Notes in Computer Science Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics, 2015
RECENT SCHOLAR PUBLICATIONS
- State of the Art: Route Choice Decisions in Transportation Systems
Ö Inal, MA Silgu, AH Lav
Arabian Journal for Science and Engineering, 1-16 , 2026
2026 - Robust Gain-Scheduled Continuous-Time Linear Quadratic Regulator for Mixed-Traffic Freeways: A Multi-Class Cell Transmission Model Approach
S Goncu, MA Silgu, HB Celikoglu
IEEE Transactions on Intelligent Transportation Systems , 2026
2026 - Hydrogen in Transportation
M Danish, M Sadat, SA Ahmad, MA Silgu
Hydrogen Energy Systems: Advancing Sustainable Power Solutions, 275-298 , 2026
2026 - Reinforcement Learning Controlled Variable Speed Limits in Urban Expressway Mixed Traffic
A Ahmad, M Sadat, SA Ahmad, S Bajpai, MA Silgu
2026 6th International Conference on Multimedia, Signal Processing and … , 2026
2026 - Impacts of Car-Following Models on Simulation-Based Safety Evaluation of Freeways
S Goncu, MA Silgu
Arabian Journal for Science and Engineering 51 (4), 5175-5189 , 2026
2026 - Reinforcement Learning-Based Freeway Traffic Control Concerning Emissions
S Goncu, MA Silgu, HB Celikoglu
Transportation Research Procedia 95, 25-32 , 2026
2026 - Traffic Congestion in Routing Problems: Insights from Autonomous Mobility-on-Demand and Shared Ride Systems
H Akova, S Göncü, MA Silgu, HB Celikoglu
Arabian Journal for Science and Engineering 51 (1), 489-501 , 2026
2026 - Araç Takip Modellerinin Karma Otoyol Trafik Akım Başarımlarına Olan Etkisinin Karşılaştırılmalı Olarak İncelenmesi: İstanbul E-80 Otoyolu Örneği
MA Silgu
Fırat Üniversitesi Mühendislik Bilimleri Dergisi 37 (2), 813-822 , 2025
2025 - Microscopic modelling of uncontrolled on-ramp at urban expressway under mixed traffic conditions
M Sadat, SA Ahmad, MA Silgu
Advances in Science, Engineering and Technology, 55-59 , 2025
2025
Citations: 1 - Exploring effect of CACC vehicle types on freeway traffic flow: Case study on a Bosphorus Strait
S Goncu, MA Silgu, H Akova, HB Celikoglu
Transportation Research Procedia 86, 467-474 , 2025
2025 - Multi-objective optimization framework for Trade-Off among pedestrian delays and vehicular emissions at Signal-Controlled intersections
G Akyol, S Göncü, MA Silgu
Arabian Journal for Science and Engineering 49 (10), 14117-14130 , 2024
2024
Citations: 8 - A framework for evaluating the safety and homogenizing effect of freeway traffic controllers on mixed traffic conditions
MA Silgu
Arabian Journal for Science and Engineering 49 (4), 4995-5010 , 2024
2024
Citations: 8 - A study on environmental impact of slow moving electric vehicles using microsimulation on Lucknow urban road with an on-ramp
M Sadat, SA Ahmad, MA Silgu, S Bajpai, D Pandey
Environmental Health Insights 18, 11786302241231706 , 2024
2024
Citations: 8 - A bi-objective traffic signal optimization model for mixed traffic concerning pedestrian delays
G Akyol, MA Silgu, S Goncu, HB Celikoglu
Transportation research procedia 78, 182-189 , 2024
2024
Citations: 5 - Mixed traffic modelling: An overview of car following and lane change models
M Sadat, SA Ahmad, MA Silgu
AI and Machine Learning Impacts in Intelligent Supply Chain, 209-225 , 2024
2024
Citations: 4 - Analysis on effects of driving behavior on freeway traffic flow: A comparative evaluation of two driver profiles using two car-following models
S Goncu, IG Erdagi, MA Silgu, HB Celikoglu
2022 IEEE Intelligent Vehicles Symposium (IV), 688-693 , 2022
2022
Citations: 19 - Evaluation of vehicle assignment algorithms for autonomous mobility on demand
S Goncu, MA Silgu, HB Celikoglu
2022 IEEE intelligent vehicles symposium (IV), 702-707 , 2022
2022
Citations: 4 - Sensitivity analysis for a cooperative adaptive cruise control car following model: Preliminary findings
S Goncu, M Ali Silgu, I Goksad Erdagı, H Berk Celikoglu
International Conference on Computer Aided Systems Theory, 370-377 , 2022
2022
Citations: 2 - A Methodology to Consider Explicitly Emissions in Dynamic User Equilibrium Assignment
MA Silgu, IG Erdagi, S Hulagu, S Akti, H Akova, G Akyol, S Goncu, ...
International Conference on Computer Aided Systems Theory, 362-369 , 2022
2022 - Effects of cooperative vehicle dynamics on traffic flow control
MA Silgu
Graduate School , 2022
2022
MOST CITED SCHOLAR PUBLICATIONS
- Extension of traffic flow pattern dynamic classification by a macroscopic model using multivariate clustering
HB Celikoglu, MA Silgu
Transportation Science 50 (3), 966-981 , 2016
2016
Citations: 73 - Combined control of freeway traffic involving cooperative adaptive cruise controlled and human driven vehicles using feedback control through SUMO
MA Silgu, İG Erdağı, G Göksu, HB Celikoglu
IEEE Transactions on Intelligent Transportation Systems 23 (8), 11011-11025 , 2021
2021
Citations: 70 - Micro-simulation based ramp metering on Istanbul freeways: an evaluation adopting ALINEA
IM Abuamer, MA Silgu, HB Celikoglu
2016 IEEE 19th International Conference on Intelligent Transportation … , 2016
2016
Citations: 45 - Analyzing the effects of driver behavior within an adaptive ramp control scheme: a case-study with ALINEA
IM Abuamer, M Sadat, MA Silgu, HB Celikoglu
2017 IEEE International Conference on Vehicular Electronics and Safety … , 2017
2017
Citations: 37 - Bee colony optimization for innovative travel time estimation, based on a mesoscopic traffic assignment model
M Dell’Orco, M Marinelli, MA Silgu
Transportation Research Part C: Emerging Technologies 66, 48-60 , 2016
2016
Citations: 33 - Clustering traffic flow patterns by fuzzy C-means method: some preliminary findings
MA Silgu, HB Celikoglu
International Conference on Computer Aided Systems Theory, 756-764 , 2015
2015
Citations: 33 - Emission effects of cooperative adaptive cruise control: a simulation case using SUMO
İG Erdağı, MA Silgu, HB Çelikoğlu
EPiC Ser. Comput 62, 92-100 , 2019
2019
Citations: 32 - Pedestrian-friendly traffic signal control using Eclipse SUMO
G Akyol, MA Silgu, HB Celikoglu
Proceedings of the SUMO User Conference, 101-106 , 2019
2019
Citations: 20 - K-means clustering method to classify freeway traffic flow patterns
MA Silgu, HB Çelikoğlu
2014
Citations: 20 - Analysis on effects of driving behavior on freeway traffic flow: A comparative evaluation of two driver profiles using two car-following models
S Goncu, IG Erdagi, MA Silgu, HB Celikoglu
2022 IEEE Intelligent Vehicles Symposium (IV), 688-693 , 2022
2022
Citations: 19 - Adaptive signal control to enhance effective green times for pedestrians: A case study
G Akyol, IG Erdagi, MA Silgu, HB Celikoglu
Transportation Research Procedia 47, 704-711 , 2020
2020
Citations: 19 - Network-wide emission effects of cooperative adaptive cruise control with signal control at intersections
MA Silgu, İG Erdağı, HB Çelikoğlu
Transportation Research Procedia 47, 545-552 , 2020
2020
Citations: 19 - H∞ state feedback controller for ODE model of traffic flow
MA Silgu, İG Erdağı, G Göksu, HB Çelikoğlu
IFAC-PapersOnLine 54 (2), 19-24 , 2021
2021
Citations: 16 - A game-theoretical approach for lane-changing maneuvers on freeway merging segments
S Akti, IG Erdagi, MA Silgu, HB Celikoglu
2020 IEEE 23rd International Conference on Intelligent Transportation … , 2020
2020
Citations: 14 - Integral input-to-state stability of traffic flow with variable speed limit
G Göksu, MA Silgu, İG Erdağı, HB Çelikoğlu
IFAC-PapersOnLine 54 (2), 31-36 , 2021
2021
Citations: 12 - Approximation of emission for heavy duty trucks in city traffic
MA Silgu, K Muderrisoglu, AH Unsal, HB Celikoglu
2018 IEEE International Conference on Vehicular Electronics and Safety … , 2018
2018
Citations: 12 - Multi-objective optimization framework for Trade-Off among pedestrian delays and vehicular emissions at Signal-Controlled intersections
G Akyol, S Göncü, MA Silgu
Arabian Journal for Science and Engineering 49 (10), 14117-14130 , 2024
2024
Citations: 8 - A framework for evaluating the safety and homogenizing effect of freeway traffic controllers on mixed traffic conditions
MA Silgu
Arabian Journal for Science and Engineering 49 (4), 4995-5010 , 2024
2024
Citations: 8 - A study on environmental impact of slow moving electric vehicles using microsimulation on Lucknow urban road with an on-ramp
M Sadat, SA Ahmad, MA Silgu, S Bajpai, D Pandey
Environmental Health Insights 18, 11786302241231706 , 2024
2024
Citations: 8 - Analyzing network-wide effects of cooperative adaptive cruise control without traffic signal control at intersections
M Ali Silgu, I Goksad Erdagi, H Berk Celikoglu
International Conference on Computer Aided Systems Theory, 79-86 , 2019
2019
Citations: 7
