Works (91)
Updated: November 19th, 2024 10:55
2024 article
A relaxation-based Voronoi diagram approach for equitable resource distribution
Li, K., Atik, A., Zheng, D., Hajibabai, L., & Hajbabaie, A. (2024, September 17). COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING, Vol. 9.
Contributors: K. Li n , A. Atik*, D. Zheng n, L. Hajibabai n & n
open access via doi.org (publisher)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: September 23, 2024
2024 article
Advancing the white phase mobile traffic control paradigm to consider pedestrians
Niroumand, R., Hajibabai, L., & Hajbabaie, A. (2024, March 10). COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING, Vol. 3.
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: April 8, 2024
2024 article
Deep Reinforcement Learning Technique for Traffic Metering in Connected Urban Street Networks
Mohebifard, R., & Hajbabaie, A. (2024, June 19). TRANSPORTATION RESEARCH RECORD, Vol. 6.
author keywords: perimeter control; data and data science; artificial intelligence and advanced computing applications; machine learning; planning and analysis; transportation network modeling
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries
Added: June 22, 2024
2024 journal article
Distributed Methodology for a Cell-Transmission-Based System Optimal Dynamic Traffic Assignment
Transportation Research Record: Journal of the Transportation Research Board.
Source: ORCID
Added: November 18, 2024
2024 article
Integrated corridor management by cooperative traffic signal and ramp metering control
Al Farabi, A., Mohebifard, R., Niroumand, R., Hajbabaie, A., Hadi, M., & Elefteriadou, L. (2024, April 16). COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING, Vol. 4.
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: April 29, 2024
2024 article
Joint Signal Timing and Trajectory Control With Uncertainty in Connected Automated Vehicle Dynamics
Bin Al Islam, S. M. A., & Hajbabaie, A. (2024, May 31). IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS, Vol. 5.
author keywords: Trajectory; Timing; Uncertainty; Vehicle dynamics; Safety; Stochastic processes; Linear programming; Signal timing; trajectory optimization; connected and automated vehicles; chance constraint optimization; optimization under uncertainty
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries
Added: June 1, 2024
2023 article
Connected autonomous vehicles: State of practice
Islam, M. M., Newaz, A. A. R., Song, L., Lartey, B., Lin, S.-C., Fan, W., … Karimoddini, A. (2023, May 25). APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, Vol. 5.
author keywords: autonomous vehicles; CAV use cases; CAVs; V2I; V2V
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: June 5, 2023
2023 journal article
Effects of Connectivity and Automation on Saturation Headway and Capacity at Signalized Intersections
Transportation Research Record: Journal of the Transportation Research Board, 8.
author keywords: operations; traffic signal systems
TL;DR:
Results show that increasing CV and CAV market-penetration rate reduces saturation headway and consequently increases capacity at signalized intersections and on the other hand, increasing the AV market-Penetration rates deteriorates traffic operations.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: August 12, 2023
2023 journal article
White Phase Intersection Control Through Distributed Coordination: A Mobile Controller Paradigm in a Mixed Traffic Stream
IEEE Transactions on Intelligent Transportation Systems, 24(3), 2993–3007.
author keywords: Trajectory; Delays; Green products; Trajectory optimization; Safety; Fuels; Complexity theory; White phase; joint signal and trajectory optimization; autonomous vehicles; mixed autonomy traffic
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: February 7, 2023
2022 journal article
A Distributed Gradient Approach for System Optimal Dynamic Traffic Assignment
IEEE Transactions on Intelligent Transportation Systems, 23(10), 17410–17424.
author keywords: Computational modeling; Computational complexity; Linear programming; Load modeling; Transportation; Loading; Heuristic algorithms; Distributed; system optimal; dynamic traffic assignment; sub-problem; decomposition
TL;DR:
This study presents a distributed gradient-based approach to solve system optimal dynamic traffic assignment (SODTA) formulated based on the cell transmission model that distributes SODTA into local sub-problems, who find optimal values for their decision variables within an intersection.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
16. Peace, Justice and Strong Institutions
(OpenAlex)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: April 21, 2022
2022 journal article
Battery Electric Vehicles Network Equilibrium With Flow-Dependent Energy Consumption
Transportation Research Record: Journal of the Transportation Research Board, 2677(5), 444–462.
author keywords: traffic assignment; electric vehicles; flow-dependent energy consumption; network equilibrium; transportation network modeling
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(Web of Science; OpenAlex)
11. Sustainable Cities and Communities
(Web of Science)
13. Climate Action
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: November 17, 2022
2022 journal article
Distributed cooperative trajectory and lane changing optimization of connected automated vehicles: Freeway segments with lane drop
Transportation Research Part C: Emerging Technologies, 143, 103761.
author keywords: Connected Automated Vehicles; Lane Changing Optimization; Trajectory Control; Freeway
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: August 24, 2022
2022 journal article
Effects of Autonomous Driving Behavior on Intersection Performance and Safety in the Presence of White Phase for Mixed-Autonomy Traffic Stream
Transportation Research Record: Journal of the Transportation Research Board, 2676(8), 112–130.
author keywords: operations; traffic signal systems
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: April 14, 2022
2022 journal article
Testing Connected Vehicle-Based Accident Mitigation for Red-Light Violation Using Simulation Strategies
Transportation Research Record: Journal of the Transportation Research Board, 2676(6), 583–600.
author keywords: connected vehicles; microscopic traffic simulation; operations; traffic flow theory and characteristics; traffic simulation
TL;DR:
This paper presents new ideas about how to do assessments of the value of vehicle to vehicle, vehicle to infrastructure, and vehicle to pedestrian communications in preventing crashes because of red-light violation at signalized intersections, and suggests that the number of near-crash events can be reduced significantly if V2V and V2P communications are implemented.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: March 12, 2022
2022 journal article
Using COVID-19 Data on Vaccine Shipments and Wastage to Inform Modeling and Decision-Making
Transportation Science, 56(5), 1135–1147.
author keywords: COVID-19; vaccine distribution; vaccine wastage; data analytics
TL;DR:
An overview of vaccine distribution logistics in the United States is given, the data the authors obtain, how they may be accessed and used by others, and some high-level analyses demonstrating some aspects of the data are described.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being
(Web of Science; OpenAlex)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: April 14, 2022
2021 journal article
An Enhanced Cell Transmission Model for Multi-Class Signal Control
IEEE Transactions on Intelligent Transportation Systems, 23(8), 11215–11226.
author keywords: Automobiles; Optimization; Process control; Linear programming; Transportation; Real-time systems; Loading; Multi-class cell transmission model; transit signal priority; signal timing optimization; traffic light control
TL;DR:
Constraints to project the position of transit vehicles based on the speed and cell occupancy variations between different classes of vehicles and incorporates them into the multi-class CTM are presented.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science; OpenAlex)
Sources: ORCID, Crossref, Web Of Science, NC State University Libraries
Added: January 3, 2022
2021 journal article
Connected automated vehicle control in single lane roundabouts
Transportation Research Part C: Emerging Technologies, 131, 103308.
author keywords: Roundabout; Connected and automated vehicles; Trajectory; Convexification; Optimization; Alternating direction method of multipliers; Model predictive
TL;DR:
An optimization problem that includes vehicle dynamics and collision-avoidance constraints with explicit representation of vehicle paths is formulated and it is shown that iterating between the two sub-problems leads to convergence to the optimal solutions of the convexified problem.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries, Crossref, ORCID
Added: October 18, 2021
2021 journal article
Effects of Connectivity and Traffic Observability on an Adaptive Traffic Signal Control System
Transportation Research Record: Journal of the Transportation Research Board, 2675(10), 800–814.
TL;DR:
The results showed that a 40% CV market share was required for the adaptive signal controller using only CV data to outperform signal control with only loop detector data, and integrating 10% of CV data with loop detectors data in the adaptive sign control improved traffic performance and travel time reliability.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: June 30, 2021
2021 article proceedings
The Effects of Connectivity on Intersection Operations with “White Phase”
The Effects of Connectivity on Intersection Operations with “White Phase.” Presented at the 2021 IEEE International Intelligent Transportation Systems Conference (ITSC).
Event: 2021 IEEE International Intelligent Transportation Systems Conference (ITSC)
TL;DR:
The results indicate that average delay decreases as the CAV market share and level of connectivity increase, and the problem is formulated as an optimization model and solved using a receding horizon framework.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure
(OpenAlex)
Sources: Crossref, NC State University Libraries
Added: September 18, 2023
2021 journal article
Traffic Signal Timing and Trajectory Optimization in a Mixed Autonomy Traffic Stream
IEEE Transactions on Intelligent Transportation Systems, 23(7), 6525–6538.
author keywords: Timing; Trajectory optimization; Fuels; Delays; Complexity theory; Vehicle dynamics; Green products; Signal timing; trajectory optimization; connected and automated vehicles; Lagrangian relaxation
TL;DR:
The developed methodology provides a balance between computational efficiency and solution quality by linearizing the nonlinear constraints and reformulating the problem with a tight convex hull of the mixed-integer solutions and decomposing the intersection-level program into several lane-level programs.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, Crossref, Web Of Science, NC State University Libraries
Added: February 21, 2021
2021 journal article
Trajectory control in roundabouts with a mixed fleet of automated and human‐driven vehicles
Computer-Aided Civil and Infrastructure Engineering, 37(15), 1959–1977.
TL;DR:
The analyses indicate that the presence of cooperative CAVs in roundabouts can lead to considerable improvements, and the solution technique has convexification, alternating direction method of multipliers, and cutting plane decomposition components to tackle the complexities of the problem.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: June 30, 2021
2021 journal article
Utilization and Cost Estimation Models for Highway Fleet Equipment
Transportation Research Record: Journal of the Transportation Research Board, 2675(12), 1172–1186.
TL;DR:
This research has identified annual mileage as an appropriate and widely used utilization metric and a set of predictive models to estimate the annual utilization of seven non-stationary highway equipment types based on several explanatory variables including their annual fuel cost, downtime hours, age, and weight.
(via Semantic Scholar)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: August 25, 2021
2020 journal article
A real-time network-level traffic signal control methodology with partial connected vehicle information
Transportation Research Part C: Emerging Technologies, 121, 102830.
author keywords: Traffic signal control; Traffic state estimation; Connected vehicles; Distributed optimization and coordination algorithm; Market penetration rate
TL;DR:
Two algorithms to estimate traffic state in urban street networks with a mixed traffic stream of connected and unconnected vehicles and incorporates them in a real-time and distributed traffic signal control methodology are presented.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science; OpenAlex)
Source: ORCID
Added: November 24, 2020
2020 article proceedings
Effects of Automated Vehicles on Traffic Operations at Roundabouts
Presented at the 2020 IEEE 23rd International Conference on Intelligent Transportation Systems (ITSC).
Event: 2020 IEEE 23rd International Conference on Intelligent Transportation Systems (ITSC)
TL;DR:
Simulation results showed that CAVs improved traffic operations in under-and semi-saturated flow conditions and the optimization of CAV trajectories resulted in significant delay reductions and improvements in the roundabout performance.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Crossref, NC State University Libraries
Added: September 18, 2023
2020 journal article
Joint optimization of vehicle-group trajectory and signal timing: Introducing the white phase for mixed-autonomy traffic stream
Transportation Research Part C: Emerging Technologies, 116, 102659.
Contributors: R. Niroumand n, M. Tajalli n, L. Hajibabai n & n
author keywords: Connected and automated vehicle; White phase; Mixed-autonomy traffic; Selfdriving vehicles
TL;DR:
A novel mixed-integer non-linear program to control the trajectory of mixed connected-automated vehicles (CAVs) and connected human-driven vehicles (CHVs) through signalized intersections and reveals that a higher CAV market penetration rate induces more frequent white phase indication compared to green-red signals.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: Web Of Science, NC State University Libraries, Crossref, ORCID
Added: June 29, 2020
2020 journal article
Network-Level Coordinated Speed Optimization and Traffic Light Control for Connected and Automated Vehicles
IEEE Transactions on Intelligent Transportation Systems, 22(11), 6748–6759.
author keywords: Optimization; Delays; Throughput; Trajectory; Fuels; Real-time systems; Connected and automated vehicles; distributed coordination; signal timing optimization; speed harmonization
TL;DR:
The results show that coordinated signal timing and speed optimization improved network performance in comparison with cases that either signal timing parameters or average speed of vehicles are optimized.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: June 6, 2020
2020 journal article
Stochastic Gradient-Based Optimal Signal Control With Energy Consumption Bounds
IEEE Transactions on Intelligent Transportation Systems, 22(5), 3054–3067.
author keywords: Energy consumption; Optimization; Delays; Linear programming; Stochastic processes; Mathematical model; Fuels; Traffic signal optimization; fuel consumption; simultaneous perturbation stochastic approximation (SPSA); vehicle-specific power; gradient approximation; SPSA with constraints
TL;DR:
A novel gradient-approximation-based solution technique offers a functional and feasible way to accommodate non-convex energy consumption bounds within a signal control optimization model to achieve maximal mobility with minimal energy consumption.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy
(OpenAlex)
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, Web Of Science, NC State University Libraries, Crossref
Added: March 19, 2020
2020 article proceedings
The Effects of the “White Phase” on Intersection Performance with Mixed-Autonomy Traffic Stream
Presented at the 2020 IEEE 23rd International Conference on Intelligent Transportation Systems (ITSC).
Event: 2020 IEEE 23rd International Conference on Intelligent Transportation Systems (ITSC)
TL;DR:
The results indicate that the white phase yields significant improvement in intersection performance while maintaining the same safety level.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Sources: Crossref, NC State University Libraries
Added: September 22, 2023
2020 journal article
Utilization Management of Highway Operations Equipment
TRANSPORTATION RESEARCH RECORD, 2674(9), 202–215.
TL;DR:
The numerical experiments reveal that the proposed framework can facilitate the utilization prediction and management of highway operations equipment and save up to 16.6% in operational costs considering different demand scenarios.
(via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: July 20, 2020
2019 journal article
A consensus-based distributed trajectory control in a signal-free intersection
Transportation Research Part C: Emerging Technologies, 100, 161–176.
Contributors: A. Mirheli *, M. Tajalli *, L. Hajibabai* & *
author keywords: Distributed algorithm; Coordination; Signal-free; Cooperative; Control logic; Connected and autonomous vehicles
TL;DR:
The results show that the proposed distributed coordinated framework converges to near-optimal CAV trajectories with no conflicts in the intersection neighborhood, while eliminating all near-crash conditions.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: August 27, 2019
2019 journal article
A decomposition scheme for parallelization of system optimal dynamic traffic assignment on urban networks with multiple origins and destinations
Computer-Aided Civil and Infrastructure Engineering, 34(10), 915–931.
Contributors: M. Mehrabipour*, L. Hajibabai* & *
TL;DR:
The numerical results show that the decomposition scheme converges to the optimal solution, within 2.0% gap, in substantially less time compared to a benchmark solution, which confirms the computational efficiency of the proposed algorithm.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: August 27, 2019
2019 journal article
Cooperative traffic signal and perimeter control in semi-connected urban-street networks
Transportation Research Part C: Emerging Technologies, 104, 408–427.
Contributors: R. Mohebifard* , S. Islam * & *
author keywords: Cooperative traffic control; Traffic signal optimization; Perimeter control; Distributed optimization and coordination algorithms; Connected vehicles
TL;DR:
An integrated formulation and a distributed solution technique for cooperative signal control and perimeter traffic metering in urban street networks with various market penetration rates of connected vehicles and observed that cooperative signal timing and perimeter control yielded significant improvements in traffic operations.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: December 10, 2019
2019 journal article
Optimal network-level traffic signal control: A benders decomposition-based solution algorithm
Transportation Research Part B: Methodological, 121, 252–274.
Contributors: R. Mohebifard* & *
author keywords: Traffic signal control; Cell transmission model; Benders decomposition; Flow holding-back problem
TL;DR:
It is proved that the proposed solution technique guarantees convergence to optimal solutions with a finite number of iterations and a dual estimation algorithm is proposed for the new MINLP (the Primal problem), which utilizes a simulation-based approach to generate Benders cuts instead of solving a complex optimization program.
(via Semantic Scholar)
Source: ORCID
Added: August 27, 2019
2018 journal article
Development of a signal-head-free intersection control logic in a fully connected and autonomous vehicle environment
Transportation Research Part C: Emerging Technologies, 92, 412–425.
Contributors: A. Mirheli *, L. Hajibabai* & *
author keywords: Control logic; Autonomous intersection control; Monte Carlo tree search; Look-ahead model; Connected and autonomous vehicles; Dynamic programming
Source: ORCID
Added: August 27, 2019
2018 journal article
Distributed Optimization and Coordination Algorithms for Dynamic Traffic Metering in Urban Street Networks
IEEE Transactions on Intelligent Transportation Systems, 20(5), 1930–1941.
Contributors: R. Mohebifard* & *
author keywords: Dynamic traffic metering; perimeter control; distributed optimization; distributed coordination; model predictive control; mixed-integer linear program
TL;DR:
A real-time and scalable methodology for finding near-optimal metering rates dynamically in urban street networks based on the cell transmission model and found significant improvements in network operations as a result of traffic metering.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: August 27, 2019
2018 journal article
Distributed optimization and coordination algorithms for dynamic speed optimization of connected and autonomous vehicles in urban street networks
Transportation Research Part C: Emerging Technologies, 95, 497–515.
Contributors: M. Tajalli * & *
TL;DR:
DOCA decomposes the nonlinear network-level speed optimization problem into several sub-network-level nonlinear problems thus, it significantly reduces the problem complexity and ensures scalability and real-time runtime constraints.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: August 27, 2019
2018 journal article
Dynamic speed harmonization in connected urban street networks
Computer-Aided Civil and Infrastructure Engineering, 33(6), 510–523.
Contributors: M. Tajalli * & *
TL;DR:
This study develops a mathematical nonlinear formulation for dynamic speed harmonization in urban street networks aiming at improving traffic operations and developed a model predictive control approach to account for stochastic changes in traffic demand and further improve the efficiency of the developed solution algorithm.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: August 27, 2019
2018 journal article
Dynamic traffic metering in urban street networks: Formulation and solution algorithm
Transportation Research Part C: Emerging Technologies, 93, 161–178.
Contributors: R. Mohebifard* & *
author keywords: Traffic metering; Perimeter control; Mixed integer linear programming; Optimization; Cell transmission model; Benders decomposition; Urban street networks
TL;DR:
This paper presents an optimization program for dynamic traffic metering in urban street networks based on the Cell Transmission Model (CTM) and develops a novel and efficient solution approach that solves the problem by converting the MILP to a linear program and several CTM simulation runs.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: August 27, 2019
2017 journal article
A cell-based distributed-coordinated approach for network-level signal timing optimization
Computer-Aided Civil and Infrastructure Engineering, 32(7), 599–616.
TL;DR:
An efficient methodology to optimize the timing of signalized intersections in urban street networks by distributing a network‐level mixed‐integer linear program (MILP) to intersection level and creating coordination between MILPs to reduce the probability of finding locally optimal solutions.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: August 27, 2019
2017 journal article
Distributed coordinated signal timing optimization in connected transportation networks
Transportation Research Part C: Emerging Technologies, 80, 272–285.
Contributors: S. Islam * & *
author keywords: Distributed-coordinated approach; Connected vehicles; Real-time and scalable; Signal timing optimization; Oversaturated flow conditions
TL;DR:
A real-time and scalable solution technique to solve the signal timing optimization problem in connected urban street networks and applied it to several case study networks under various demand patterns.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: August 27, 2019
2017 journal article
Estimation of saturation headway in work zones on urban streets
Transportation Research Record, 2615(1), 26–34.
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: August 27, 2019
2017 journal article
Freeway work zone free-flow speed model development
ITE Journal (Institute of Transportation Engineers), 87(11), 38–44. http://www.scopus.com/inward/record.url?eid=2-s2.0-85044119212&partnerID=MN8TOARS
Source: ORCID
Added: May 22, 2020
2017 journal article
On the relationships between commuting mode choice and public health
Journal of Transport & Health, 4, 267–277.
Contributors: M. Tajalli * & *
author keywords: Commuting mode choice; Public health; Mental health; Homeworking; Choice model; Binary probit
TL;DR:
Community Health Survey data collected in New York City in 2010 shows that walking, as expected, is associated with a lower probability of obesity, hypertension, diabetes, and mental disorders when compared to using private transportation.
(via Semantic Scholar)
Source: ORCID
Added: August 27, 2019
2016 journal article
Enhanced Decision-Making Framework Using Reliability Concepts for Freeway Facilities
Journal of Transportation Engineering, 142(4), 04016008.
Contributors: * , S. Aghdashi n & N. Rouphail n
author keywords: Travel time reliability; Decision-making framework; Highway capacity manual
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, Crossref, NC State University Libraries
Added: August 27, 2019
2016 conference paper
Proposed Data-Driven Performance Measures for Comparing and Ranking Traffic Bottlenecks
Transportation Research Procedia, 15, 483–494.
author keywords: performance measures; traffic bottlenecks; INRIX; reliability
Source: ORCID
Added: May 22, 2020
2015 conference paper
A Planning-Level Methodology for Freeway Facilities
The 94th Annual Meeting of the Transportation Research Board. Presented at the 94th Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 94th Annual Meeting of the Transportation Research Board at Washington, DC on January 11-15, 2015
Source: NC State University Libraries
Added: September 23, 2023
2015 journal article
A program for simultaneous network signal timing optimization and traffic assignment
IEEE Transactions on Intelligent Transportation Systems, 16(5), 2573–2586.
Contributors: * & R. Benekohal *
author keywords: Network signal timing optimization; traffic assignment; genetic algorithms; weighted trip maximization; objective function upper-bound; system optimal
TL;DR:
This study formulates a program for simultaneous traffic signal optimization and system optimal traffic assignment for urban transportation networks with added degree of realism and proposes a framework to calculate an upper bound on the value of the objective function by solving the problem while several constraints are relaxed.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: August 27, 2019
2015 journal article
Dynamic Bandwidth Analysis for Coordinated Arterial Streets
JOURNAL OF INTELLIGENT TRANSPORTATION SYSTEMS, 20(3), 294–310.
Contributors: S. Kim n, * , B. Williams n & N. Rouphail n
TL;DR:
Detailed analysis at three arterial sites revealed that coordinated green phase time distributions are complex and multimodal and cannot be represented by a single-valued statistic, and dynamic bandwidth analysis confirmed that programmed green bandwidth consistently underestimates the size of the actual dynamic bandwidth.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science; OpenAlex)
Sources: ORCID, Web Of Science, NC State University Libraries
Added: August 6, 2018
2015 conference paper
Estimating Saturation Headways at Work Zones on Urban Arterials
The 94th Annual Meeting of the Transportation Research Board. Presented at the 94th Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 94th Annual Meeting of the Transportation Research Board at Washington, DC on January 11-15, 2015
Source: NC State University Libraries
Added: September 30, 2023
2015 conference paper
Freeway Reliability Scenario Generation: A Hybrid Approach
The 94th Annual Meeting of the Transportation Research Board. Presented at the 94th Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 94th Annual Meeting of the Transportation Research Board at Washington, DC on January 11-15, 2015
Source: NC State University Libraries
Added: September 30, 2023
2015 conference paper
Freeway Work Zone Speed Prediction from Multi-State Sensor Data
The 94th Annual Meeting of the Transportation Research Board. Presented at the 94th Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 94th Annual Meeting of the Transportation Research Board at Washington, DC on January 11-15, 2015
Source: NC State University Libraries
Added: September 30, 2023
2015 journal article
Generating Scenarios of Freeway Reliability Analysis: Hybrid Approach
Transportation Research Record: Journal of the Transportation Research Board, 2483(1), 148–159.
Contributors: S. Aghdashi n, * , B. Schroeder, J. Trask n & N. Rouphail n
TL;DR:
A comparison of results between the proposed method and the SHRP 2 Project L08 approach confirms that the proposed approach yields a higher level of accuracy in matching observed freeway reliability performance measures.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 27, 2019
2015 conference paper
Generic Speed Flow Models for Basic Freeway Segments on General Purpose and Managed Lanes
The 94th Annual Meeting of the Transportation Research Board. Presented at the 94th Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 94th Annual Meeting of the Transportation Research Board at Washington, DC on January 11-15, 2015
Source: NC State University Libraries
Added: September 30, 2023
2015 journal article
Generic Speed--Flow Models for Basic Freeway Segments on General-Purpose and Managed Lanes in Undersaturated Flow Conditions
Transportation Research Record, 2483(1), 102–110.
Source: ORCID
Added: August 27, 2019
2015 book
Generic speed-flow models for basic freeway segments on general-purpose and managed lanes in undersaturated flow conditions
In Transportation Research Record (Vol. 2483, pp. 102–110).
Contributors: S. Aghdashi n, N. Rouphail *, * & B. Schroeder n
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: ORCID
Added: May 22, 2020
2015 conference paper
Innovative Work Zone Capacity Models from Nationwide Field and Archival Sources
The 94th Annual Meeting of the Transportation Research Board. Presented at the 94th Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 94th Annual Meeting of the Transportation Research Board at Washington, DC on January 11-15, 2015
Source: NC State University Libraries
Added: September 30, 2023
2015 journal article
Innovative work zone capacity models from nationwide field and archival sources
Transportation Research Record, 2485(1), 51–60.
Contributors: C. Yeom n, * , B. Schroeder n, C. Vaughan n, X. Xuan n & N. Rouphail n
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: ORCID
Added: August 27, 2019
2015 journal article
Planning-Level Methodology for Freeway Facilities
Transportation Research Record, 2483(1), 47–56.
Contributors: * , N. Rouphail n, B. Schroeder & R. Dowling
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: ORCID
Added: August 27, 2019
2013 journal article
Effects of metered entry volume on an oversaturated network with dynamic signal timing
Transportation Research Record, 2356(1), 53–60.
Contributors: J. Medina *, n & R. Benekohal *
TL;DR:
This paper analyzes the effects of different traffic metering levels at the entry points of a simulated signalized network to maintain efficient vehicle processing and suggests that an optimal congestion level exists inside the network that can be achieved by a metering strategy.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Source: ORCID
Added: August 27, 2019
2013 journal article
Effects of metered entry volume on an oversaturated network with dynamic signal timing
Transportation Research Record, (2356), 53–60.
Source: NC State University Libraries
Added: August 6, 2018
2013 conference paper
Estimating Incident Propensity Analysis in the Highway Capacity Manual
The 92nd Annual Meeting of the Transportation Research Board. Presented at the 92nd Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 92nd Annual Meeting of the Transportation Research Board at Washington, DC on January 13-17, 2013
Source: NC State University Libraries
Added: September 30, 2023
2013 journal article
Estimation of incident propensity for reliability analysis in the Highway Capacity Manual
Transportation Research Record, 2395(1), 123–131.
Contributors: S. Aghdashi n, N. Rouphail n & n
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science)
Sources: ORCID, NC State University Libraries, NC State University Libraries
Added: August 6, 2018
2013 conference paper
Incorporating Weather Effects in HCM Reliability Analysis
The 92nd Annual Meeting of the Transportation Research Board. Presented at the 92nd Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 92nd Annual Meeting of the Transportation Research Board at Washington, DC on January 13-17, 2013
Source: NC State University Libraries
Added: September 30, 2023
2013 journal article
Traffic Signal Timing Optimization Choosing the Objective Function
TRANSPORTATION RESEARCH RECORD, 2355(2355), 10–19.
Contributors: n & R. Benekohal *
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(Web of Science; OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018
2011 conference paper
A comparison of approximate dynamic programming and simple genetic algorithm for traffic control in oversaturated conditions - Case study of a simple symmetric network
IEEE Conference on Intelligent Transportation Systems, Proceedings, ITSC, 1815–1820.
Contributors: J. Medina *, * & R. Benekohal *
TL;DR:
The performance of two algorithms for finding traffic signal timings in a small symmetric network with oversaturated conditions was analyzed, showing that even though the solutions from ADP were very different from those in GA, the network performance was similar, used green time efficiently preventing queue backups, and served all approaches according to current demands.
(via Semantic Scholar)
Source: ORCID
Added: May 22, 2020
2011 conference paper
Common or Variable Cycle Length Policy for a More Efficient Network Performance?
Transportation and Development Institute Congress 2011, 1138–1146.
Contributors: * & R. Benekohal *
Event: First Congress of Transportation and Development Institute (TDI)
TL;DR:
The finding, as an example of other conditions that were analyzed, indicated that using variable signal timing policy results in a considerably higher number of vehicles processed by the network as well as a significantly lower delay in the network compared to a common cycle length.
(via Semantic Scholar)
Sources: ORCID, Crossref, NC State University Libraries
Added: May 22, 2020
2011 journal article
Detection Performance of Wireless Magnetometers at Signalized Intersection and Railroad Grade Crossing under various Weather Conditions
Transportation Research Record: Journal of the Transportation Research Board, 2259(1), 233–241.
Contributors: J. Medina *, * & R. Benekohal *
TL;DR:
The performance of wireless magnetometers for vehicle detection was evaluated under favorable and adverse weather conditions at two sites: a signalized intersection with stop bar and advance detection zones and a railroad grade crossing, as a potential backup system to control the operation of gates.
(via Semantic Scholar)
Sources: ORCID, Crossref, NC State University Libraries
Added: August 27, 2019
2011 conference paper
Detection Performance of Wireless Magnetometers at a Signalized and a Railroad Grade Crossing under Different Weather Conditions
The 90th Annual Meeting of the Transportation Research Board. Presented at the 90th Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 90th Annual Meeting of the Transportation Research Board at Washington, DC on January 23-27, 2011
Source: NC State University Libraries
Added: September 30, 2023
2011 conference paper
Does traffic metering improve network performance efficiency?
IEEE Conference on Intelligent Transportation Systems, Proceedings, ITSC, 1114–1119.
Contributors: * & R. Benekohal *
TL;DR:
The results showed that letting all traffic enter the network or metering a large portion of the traffic are not the best options and suggested that in an urban network, there is an optimal point that sending more vehicles into the network than that deteriorates network performance efficiency.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: May 22, 2020
2011 conference paper
Evaluation of wireless magnetometers for vehicle detection at signalized intersections
T and DI Congress 2011: Integrated Transportation and Development for a Better Tomorrow - Proceedings of the 1st Congress of the Transportation and Development Institute of ASCE, 1147–1156.
Contributors: J. Medina *, * & R. Benekohal *
Source: ORCID
Added: May 22, 2020
2011 journal article
Safety and headway characteristics in highway work zones with automated speed enforcement
Advances in Transportation Studies, (23), 67–76.
Contributors: M. Wang*, R. Benekohal *, H. Ramezani*, H. Nassiri *, J. Medina * & *
Source: ORCID
Added: August 27, 2019
2011 conference paper
Speed photo enforcement effects on headways in work zones
T and DI Congress 2011: Integrated Transportation and Development for a Better Tomorrow - Proceedings of the 1st Congress of the Transportation and Development Institute of ASCE, 1226–1234.
Contributors: * , H. Ramezani * & R. Benekohal *
TL;DR:
The results of this study showed that the presence of the SPE did not reduce the headway of the traffic stream at the location that it was present, as well as at the downstream location, and the same result was observed for different pairs of leaders and followers.
(via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities
(OpenAlex)
Source: ORCID
Added: May 22, 2020
2011 journal article
Sustained and Halo Effects of Various Speed Reduction Treatments in Highway Work Zones
Transportation Research Record: Journal of the Transportation Research Board, 2265(1), 118–128.
Contributors: * , J. Medina *, M. Wang*, R. Benekohal * & M. Chitturi *
UN Sustainable Development Goal Categories
3. Good Health and Well-being
(OpenAlex)
Sources: ORCID, Crossref, NC State University Libraries
Added: August 27, 2019
2011 conference paper
Sustained and Halo Effects of Various Speed Reduction Treatments in Highway Work Zones
The 90th Annual Meeting of the Transportation Research Board. Presented at the 90th Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 90th Annual Meeting of the Transportation Research Board at Washington, DC on January 23-27, 2011
Source: NC State University Libraries
Added: September 30, 2023
2010 conference paper
Arterial traffic control using reinforcement learning agents and information from adjacent intersections in the state and reward structure
13th International IEEE Conference on Intelligent Transportation Systems, 525–530.
Contributors: J. Medina *, * & R. Benekohal *
Event: 2010 13th International IEEE Conference on Intelligent Transportation Systems - (ITSC 2010)
TL;DR:
An application that uses reinforcement learning (RL) agents for traffic control along an arterial under high traffic volumes is presented, and results showed lower delays and less number of stops with RL agents, as well as a more balanced distribution of the delay among all vehicles in the system.
(via Semantic Scholar)
Sources: ORCID, Crossref, NC State University Libraries
Added: May 22, 2020
2010 journal article
Effectiveness of Automated Speed Enforcement in Work Zones
Institute of Transportation Engineers. ITE Journal, 80(6), 26.
Source: ORCID
Added: August 27, 2019
2010 journal article
Effectiveness of automated speed enforcement in work Zones
ITE Journal (Institute of Transportation Engineers), 80(6), 26–35. http://www.scopus.com/inward/record.url?eid=2-s2.0-77954149350&partnerID=MN8TOARS
Source: ORCID
Added: May 22, 2020
2010 conference paper
Effects of ITS-based left turn policies on network performance
13th International IEEE Conference on Intelligent Transportation Systems, 80–84.
Contributors: * , J. Medina * & R. Benekohal *
Event: 2010 13th International IEEE Conference on Intelligent Transportation Systems - (ITSC 2010)
TL;DR:
Compared the effects of three ITS-based left turn policies on the performance of a congested transportation network, it was showed that prohibiting left turns in every other intersection along an arterial of the case study network increased the total number of vehicles processed by the network by 6.6% and resulted in a total of 2550 processed vehicles.
(via Semantic Scholar)
Sources: ORCID, Crossref, NC State University Libraries
Added: May 22, 2020
2010 conference paper
The Effects of Heavy Vehicle Percentage on Passenger Car Equivalency Factor
Proceedings of the TFT 2010 Conference. Presented at the TFT 2010 Conference, Annecy, France.
Event: TFT 2010 Conference at Annecy, France on July 7-9, 2010
Source: NC State University Libraries
Added: September 30, 2023
2010 conference paper
Wireless Magnetometers for Traffic Data Collection at Signalized Intersections
Proceedings of the TFT 2010 Conference. Presented at the TFT 2010 Conference, Annecy, France.
Event: TFT 2010 Conference at Annecy, France on July 7-9, 2010
Source: NC State University Libraries
Added: September 30, 2023
2009 conference paper
Comparison of Effects of Automated Speed Enforcement and Police Presence on Speeding in Work Zones
The 88th Annual Meeting of the Transportation Research Board. Presented at the 88th Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 88th Annual Meeting of the Transportation Research Board at Washington, DC on January 11-15, 2009
Source: NC State University Libraries
Added: September 30, 2023
2009 journal article
Downstream Effects of Speed Photo--Radar Enforcement and Other Speed Reduction Treatments on Work Zones
Transportation Research Record, 2107(1), 24–33.
Source: ORCID
Added: August 27, 2019
2009 conference paper
Downstream Effects of Speed Photo–Radar Enforcement and Other Speed Reduction Treatments on Work Zones
The 88th Annual Meeting of the Transportation Research Board. Presented at the 88th Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 88th Annual Meeting of the Transportation Research Board at Washington, DC on January 11-15, 2009
Source: NC State University Libraries
Added: September 30, 2023
2009 book
Downstream effects of speed photo-radar enforcement and other speed reduction treatments on work zones
In Transportation Research Record (pp. 24–33).
Contributors: J. Medina *, R. Benekohal *, * , M. Wang* & M. Chitturi *
TL;DR:
The effects of automated speed photo–radar enforcement (SPE) and traditional speed reduction treatments (speed feedback trailer, presence of police vehicles with emergency lights on and off, and combinations of the speed feedback trailer and police presence) on speed were studied at a location 1.5 mi downstream of the actual treatment (spatial effects).
(via Semantic Scholar)
Source: ORCID
Added: May 22, 2020
2009 conference paper
Evolution strategies compared to genetic algorithms in finding optimal signal timing for oversaturated transportation network
IJCCI 2009 - International Joint Conference on Computational Intelligence, Proceedings, 298–301. http://www.scopus.com/inward/record.url?eid=2-s2.0-77955445784&partnerID=MN8TOARS
Source: ORCID
Added: May 22, 2020
2009 journal article
Speed Photo--Radar Enforcement and Its Effects on Speed in Work Zones
Transportation Research Record, 2096(1), 89–97.
Source: ORCID
Added: August 27, 2019
2009 conference paper
Speed Photo–Radar Enforcement and Its Effects on Speed in Work Zones
The 88th Annual Meeting of the Transportation Research Board. Presented at the 88th Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 88th Annual Meeting of the Transportation Research Board at Washington, DC on January 11-15, 2009
Source: NC State University Libraries
Added: September 30, 2023
2009 book
Speed photo-radar enforcement and Its effects on speed in work zones
In Transportation Research Record (pp. 89–97).
Contributors: R. Benekohal *, M. Wang*, M. Chitturi *, * & J. Medina *
Source: ORCID
Added: May 22, 2020
2008 conference paper
Automated Speed Enforcement Effects on Speeding and Platooning in Work Zones
The 10th International Conference on Applications of Advanced Technologies in Transportation. Presented at the 10th International Conference on Applications of Advanced Technologies in Transportation, Athens, Greece.
Event: 10th International Conference on Applications of Advanced Technologies in Transportation at Athens, Greece on May 27-31, 2008
Source: NC State University Libraries
Added: September 30, 2023
2008 conference paper
Automated Speed Photo Enforcement Effects on Speeds in Work Zones
The 87th Annual Meeting of the Transportation Research Board. Presented at the 87th Annual Meeting of the Transportation Research Board, Washington, DC.
Event: 87th Annual Meeting of the Transportation Research Board at Washington, DC on January 13-17, 2008
Source: NC State University Libraries
Added: September 30, 2023
2008 journal article
Automated speed photo enforcement effects on speeds in work zones
Transportation Research Record, 2055(1), 11–20.
Contributors: R. Benekohal *, M. Chitturi *, * , M. Wang* & J. Medina *
Source: ORCID
Added: August 27, 2019
Employment
Updated: September 15th, 2023 09:56
2022 - present
NC State University Raleigh, NC, US
Associate Professor
Civil, Construction, and Environmental Engineering
2019 - 2022
North Carolina State University Raleigh, North Carolina, US
Assistant Professor
Civil, Construction and Environmental Engineering
2014 - 2019
Washington State University Pullman, Washington, US
Assistant Professor
Civil and Environmental Engineering
Education
Updated: September 15th, 2023 09:59
2006 - 2011
University of Illinois at Urbana-Champaign Urbana, IL, US
Ph.D.
Civil and Environmental Engineering
University of Illinois Urbana-Champaign Urbana, Illinois, US
Master of Science
Civil and Environmental Engineering
Sharif University of Technology Tehran, IR
Master of Science
Civil and Environmental Engineering
Sharif University of Technology Tehran, IR
Bachelor of Science
Civil and Environmental Engineering
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