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Title: Evaluating the impact of increased frequency on light rail operations on private traffic.
Creator: Mitrovic, Nikola, Stevanovic, Aleksandar, Graduate College
Date Issued: 2011-04-08
PURL: http://purl.flvc.org/fcla/dt/3164665
Subject Headings: Railroads, Local and light--Utah--Salt Lake City Metropolitan Area, Freight and freightage, Traffic flow
Format: Document (PDF)

Title: Travel-time Based Signal Performance Measures (TTSPM).
Creator: Petrovska, Natasha, Stevanovic, Aleksandar, Graduate College
Abstract/Description: Vehicle travel time on arterial roads with signalized intersections is an essential parameter for traffic management. There is an increasing interest in signal performance measurement for signalized intersections in the United States. Reducing the journey times and increasing the capacity are some of the fundamental aims with potential benefits in environmental pollution, and energy utilization. The Travel-time Based Signal Performance Measures application is a tool for estimating signal...
Show moreVehicle travel time on arterial roads with signalized intersections is an essential parameter for traffic management. There is an increasing interest in signal performance measurement for signalized intersections in the United States. Reducing the journey times and increasing the capacity are some of the fundamental aims with potential benefits in environmental pollution, and energy utilization. The Travel-time Based Signal Performance Measures application is a tool for estimating signal performance measures based on upstream-link travel times. The application utilizes well known concept of Volume- Delay Functions to convert measured travel times into signal performance measures. Based on this functionality, it can estimate the performance measures for 7 signalized intersections on Glades Road, Boca Raton, Florida. Available performance measures for the major through movements are: volumeto- capacity ratio, Level of Service LOS, and the number of cycles to wait. The derived measures can be graphically visualized on Google Maps. The travel time data acquisition is performed using BlueTOAD devices. The goal is to introduce automated assessment tool, visualization and evaluation of the intersections’ performance measures simultaneously at multiple intersections. The main objective of this web application is to help traffic operators/engineers to evaluate performance of the signalized corridors exploiting the archived measured travel times.
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Date Issued: 2015
PURL: http://purl.flvc.org/fau/fd/FA00005907
Format: Document (PDF)

Title: Assessment of optimality of arterial signal timing plans under diurnal and day-to-day variations in traffic demand.
Creator: Ostojic, Marija, Stevanovic, Aleksandar, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: Most U.S. urban traffic signal systems deploy multiple signal timing plans to account for daily variability of traffic demand (i.e. morning peak, midday, afternoon peak, off peak and night). Groups of signals (belonging to the one zone or section) along an urban arterial, usually operate in a coordinated manner. This essentially means that timing plans change at the same time for all the signals in the group, so as to facilitate vehicle progression of through a series of signals. Good traffic...
Show moreMost U.S. urban traffic signal systems deploy multiple signal timing plans to account for daily variability of traffic demand (i.e. morning peak, midday, afternoon peak, off peak and night). Groups of signals (belonging to the one zone or section) along an urban arterial, usually operate in a coordinated manner. This essentially means that timing plans change at the same time for all the signals in the group, so as to facilitate vehicle progression of through a series of signals. Good traffic signal timing practices assume a certain level of monitoring and maintenance in order to guarantee that they are efficient in servicing current traffic conditions.
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Date Issued: 2015
PURL: http://purl.flvc.org/fau/fd/FA00004457, http://purl.flvc.org/fau/fd/FA00004457
Subject Headings: Electronic traffic controls -- Evaluation, Roads -- Safety measures -- Evaluation, Signalized intersections, Traffic flow management, Traffic signs and signals -- Control systems -- Methodology, Transportation engineering -- Technological innovations
Format: Document (PDF)

Title: Estimating Pedestrian Impact on Coordination of Urban Corridors.
Creator: Chowdhury, Sharmin-E-Shams, Stevanovic, Aleksandar, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: At most of the US signal, pedestrian walk timings run in concurrence with relevant vehicular traffic signal phases which means that major-street coordinated operations can be interrupted by a pedestrian call. Such interruption may increase delays and stops for major traffic flows. An alternative to this design is to increase the cycle length and embed pedestrian timings within the ring-barrier structure of the prevailing coordination plan. Both approaches have advantages and disadvantages....
Show moreAt most of the US signal, pedestrian walk timings run in concurrence with relevant vehicular traffic signal phases which means that major-street coordinated operations can be interrupted by a pedestrian call. Such interruption may increase delays and stops for major traffic flows. An alternative to this design is to increase the cycle length and embed pedestrian timings within the ring-barrier structure of the prevailing coordination plan. Both approaches have advantages and disadvantages. This study attempts a novel approach to address this situation by a comprehensive experimental evaluation of traffic performance under various pedestrian signal timing strategies. Findings show that either abovementioned approach works well for very low traffic demands. When the traffic demand increases findings cannot be generalized as they differ for major coordinated movements versus overall network performance. While coordinated movements prefer no interruption of the coordinated operations, the overall network performance is better in the other case.
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Date Issued: 2018
PURL: http://purl.flvc.org/fau/fd/FA00013128
Subject Headings: Transportation corridors, Pedestrians, Urban traffic, Traffic estimation
Format: Document (PDF)

Title: Configuration and assessment of hardware-in-the-loop-simulation with high resolution data to coordinate traffic signals.
Creator: Klanac, Ivica, Stevanovic, Aleksandar, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: Today, the information (signal timings, detector extension, phase sequence, etc.) to install traffic lights on the street are obtained from traffic software simulations platforms, meaning that information from simulation is not tested on the field (intersection where it will be installed) before the installation. Many installed controllers on the street use time of day (TOD) patterns due to cheaper cost than adaptive traffic control systems, but that is not the best solution for traffic...
Show moreToday, the information (signal timings, detector extension, phase sequence, etc.) to install traffic lights on the street are obtained from traffic software simulations platforms, meaning that information from simulation is not tested on the field (intersection where it will be installed) before the installation. Many installed controllers on the street use time of day (TOD) patterns due to cheaper cost than adaptive traffic control systems, but that is not the best solution for traffic volume changes that can occur during the day or even a month. To improve traffic signal operation most of the traffic signal controllers in the same corridor or zone operate in coordination mode. Furthermore, phases need to be in coordination to achieve “green wave”. Green wave is term used when in corridor traffic lights allow continues flow of traffic through intersections that are coordinated.
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Date Issued: 2016
PURL: http://purl.flvc.org/fau/fd/FA00004709, http://purl.flvc.org/fau/fd/FA00004709
Subject Headings: Digital control systems, Digital integrated circuits -- Design and construction, Hardware in the loop simulation, Highway engineering -- Safety measures, Traffic engineering -- Technological innovations, Traffic flow -- Management, Traffic signs and signals -- Control systems -- Methodology
Format: Document (PDF)

Title: Framework for Integration of the Driving Simulator in Connected Vehicle Environment.
Creator: Ostojic, Bratislav, Stevanovic, Aleksandar, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: Research on connected vehicles (CV) has attracted attention in the last decade due to numerous potential applications and challenges related to exchange of information between the vehicles (and infrastructure). Most of the relevant studies focus on these applications and challenges with the help of novel or existing simulation frameworks. The simulation framework often contains the mobility and communication components, and these components are frequently simplified. In this study, the...
Show moreResearch on connected vehicles (CV) has attracted attention in the last decade due to numerous potential applications and challenges related to exchange of information between the vehicles (and infrastructure). Most of the relevant studies focus on these applications and challenges with the help of novel or existing simulation frameworks. The simulation framework often contains the mobility and communication components, and these components are frequently simplified. In this study, the authors aim to provide the detailed information for developing a fully V2X capable infrastructure within the lab environment. The physical components of the proposed infrastructure include: (i) userdriven Driving Simulator (DS) with the embedded micro-simulation tool (MS); (ii) external traffic signal controller (TSC); (iii) Road Side Unit (RSU) and omnidirectional antenna attached to RSU; (iv) On-Board Unit (OBU) that is integrated within DS‘s cockpit. The proposed framework can be used for advanced applications in the context of connected vehicles.
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Date Issued: 2017
PURL: http://purl.flvc.org/fau/fd/FA00004936, http://purl.flvc.org/fau/fd/FA00004936
Subject Headings: Intelligent transportation systems., Wireless communication systems., Traffic flow--Computer simulation., Traffic signs and signals--Evaluation--Computer simulation., Highway communications.
Format: Document (PDF)

Title: EVALUATION OF THEORETICAL AND PRACTICAL SIGNAL OPTIMIZATION TOOLS IN MICROSIMULATION ENVIRONMENT.
Creator: Al shayeb, Suhaib, Stevanovic, Aleksandar, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: Traffic simulation and signal timing optimization are classified in structure into two main categories: (i) Macroscopic or Microscopic; (ii) Deterministic or Stochastic. Performance of the optimized signal timing derived by any tool is influenced by the methodology used in how calculations are executed in a particular tool. In this study, the performance of the optimal signal timing plans developed by two of the most popular traffic analysis tools, HCS and Tru-Traffic, each of them has its...
Show moreTraffic simulation and signal timing optimization are classified in structure into two main categories: (i) Macroscopic or Microscopic; (ii) Deterministic or Stochastic. Performance of the optimized signal timing derived by any tool is influenced by the methodology used in how calculations are executed in a particular tool. In this study, the performance of the optimal signal timing plans developed by two of the most popular traffic analysis tools, HCS and Tru-Traffic, each of them has its inbuilt objective function(s) to optimize signal timing for intersection, is compared with an ideal and an existing timing plans (base case) for the area of study using the microsimulation software VISSIM. An urban arterial with 29 intersections and high traffic in Fort Lauderdale, Florida serves as the test bed. To eliminate unfair superiority in the results, all experiments were performed under identical geometry and traffic conditions in each tool. Comparison of the optimized plans is conducted on the basis of average delay, average stopped delay, average number of stops, number of vehicles completed trips, latent delay, and latent demand from the simulated vehicle network performance evaluation results in VISSIM. The results indicate that, overall, HCS with its overall delay objective and the Tru-Traffic programs produce signal timing with comparable quality that performed similar to the un-optimized base case for most of the performance measures.
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Date Issued: 2019
PURL: http://purl.flvc.org/fau/fd/FA00013284
Subject Headings: Traffic simulation, Traffic signal timing, Microsimulation, Traffic signs and signals--Automatic control
Format: Document (PDF)

Title: On Development of Arterial Fundamental Diagrams Based on Surrogate Density Measures from Adaptive Traffic Control Systems Utilizing Stop Line Detection.
Creator: Dakic, Igor, Stevanovic, Aleksandar, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: Macroscopic fundamental diagram is the concept of the highest importance in traffic flow theory used for development of network-wide control strategies. Previous studies showed that so called Arterial Fundamental Diagrams (AFDs) properly depict relationships between major macroscopic traffic variables on urban arterials. Most of these studies used detector’s occupancy as a surrogate measure to represent traffic density. Nevertheless, detector’s occupancy is not very often present in the field...
Show moreMacroscopic fundamental diagram is the concept of the highest importance in traffic flow theory used for development of network-wide control strategies. Previous studies showed that so called Arterial Fundamental Diagrams (AFDs) properly depict relationships between major macroscopic traffic variables on urban arterials. Most of these studies used detector’s occupancy as a surrogate measure to represent traffic density. Nevertheless, detector’s occupancy is not very often present in the field data. More frequently, field data from arterial streets provide performance metrics measured at the stop lines of traffic signals, which represent a hybrid of flow and occupancy. When such performance measures are used in lieu of density, the outcomes of the relationships between macroscopic fundamental variables can be confusing. This study investigates appropriateness of using degree of saturation, as a representative surrogate measure of traffic density, obtained from an adaptive traffic control system that utilizes stop-line detectors, for development of AFDs.
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Date Issued: 2016
PURL: http://purl.flvc.org/fau/fd/FA00004672, http://purl.flvc.org/fau/fd/FA00004672
Subject Headings: Adaptive control systems, Intelligent transportation systems, Traffic engineering, Traffic estimation -- Computer simulation, Traffic estimation -- Mathematical models, Traffic flow -- Computer simulation, Traffic flow -- Mathematical models
Format: Document (PDF)

Title: MODIFYING SIGNAL RETIMING PROCEDURES AND POLICIES: A CASE OF HIGH-FIDELITY MODELING WITH MEDIUM-RESOLUTION DATA.
Creator: Dobrota, Nemanja, Stevanovic, Aleksandar, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: Signal retiming, or signal optimization process, has not changed much over the last few decades. Traditional procedures rely on low-resolution data and a low-fidelity modeling approach. Such developed signal timing plans always require a fine-tuning process for deployed signal plans in field, thus questioning the very benefits of signal optimization. New trends suggest the use of high-resolution data, which are not easily available. At the same time, many improvements could be made if the...
Show moreSignal retiming, or signal optimization process, has not changed much over the last few decades. Traditional procedures rely on low-resolution data and a low-fidelity modeling approach. Such developed signal timing plans always require a fine-tuning process for deployed signal plans in field, thus questioning the very benefits of signal optimization. New trends suggest the use of high-resolution data, which are not easily available. At the same time, many improvements could be made if the traditional signal retiming process was modified to include the use of medium-resolution data and high-fidelity modeling. This study covers such an approach, where a traditional retiming procedure is modified to utilize large medium-resolution data sets, high-fidelity simulation models, and powerful stochastic optimization to develop robust signal timing plans. The study covers a 28-intersection urban corridor in Southeastern Florida. Medium-resolution data are used to identify peak-hour, Day-Of-Year (DOY) representative volumes for major seasons. Both low-fidelity and high-fidelity models are developed and calibrated with high precision to match the field signal operations. Then, by using traditional and stochastic optimization tools, signal timing plans are developed and tested in microsimulation. The findings reveal shortcomings of the traditional approach. Signal timing plans developed from medium-resolution data and high-fidelity modeling approach reduce average delay by 5%-26%. Travel times on the corridor are usually reduced by up to 10.5%, and the final solution does not transfer delay on the other neighboring streets (illustrated through latent delay), which is also decreased by 10%-49% when compared with the traditional results. In general, the novel approach has shown a great potential. The next step should be field testing and validation.
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Date Issued: 2019
PURL: http://purl.flvc.org/fau/fd/FA00013298
Subject Headings: Traffic signal timing, Traffic signs and signals--Automatic control, Traffic signs and signals--Research, Stochastic optimization
Format: Document (PDF)

Title: Monitoring of Traffic Signal System’s Performance and Reliability Based on the Data from ATMS.now Signal System Central Software.
Creator: Radivojevic, Danilo, Stevanovic, Aleksandar, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: The monitoring of traffic signal systems can be of great importance for identifying problems, self-assessment, budgeting, creating the strategy for future steps, etc. Monitoring procedure was developed through a set of dashboards with relevant signal performance and reliability measures. The dashboards were created to reflect performance and reliability of a specific signal system on a weekly or monthly level. The author used data from ATMS.now signal system central software to illustrate how...
Show moreThe monitoring of traffic signal systems can be of great importance for identifying problems, self-assessment, budgeting, creating the strategy for future steps, etc. Monitoring procedure was developed through a set of dashboards with relevant signal performance and reliability measures. The dashboards were created to reflect performance and reliability of a specific signal system on a weekly or monthly level. The author used data from ATMS.now signal system central software to illustrate how similar dashboards could be developed from any central software to enable operators to promptly and efficiently monitor various parameters of traffic signals. The main outcome of the study is a pair of Excel dashboards accompanied with appropriate user manual. The dashboards represent the tool for monitoring which can be helpful in the process of evaluation for traffic signal systems.
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Date Issued: 2017
PURL: http://purl.flvc.org/fau/fd/FA00004864, http://purl.flvc.org/fau/fd/FA00004864
Subject Headings: Traffic signs and signals--Control systems., Traffic signs and signals--Evaluation., Multiuser detection (Telecommunication)
Format: Document (PDF)

Title: TESTING ALTERNATIVE METHODS TO CALCULATE USER TOLLS ON I-95 EXPRESS LANES.
Creator: Mitrovic, Durdija, Stevanovic, Aleksandar, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: Nowadays, there is increasing number of facilities that implement various pricing strategies in order to manage increasing traffic demand. Most of these strategies use traffic data collected on several points in the system, aggregate them in certain aggregation interval and calculate tolls based on them. Some strategies derive performance measures (as traffic density) based on aggregated data, and define tolls. However, derived performance measures tend to underestimate traffic conditions and...
Show moreNowadays, there is increasing number of facilities that implement various pricing strategies in order to manage increasing traffic demand. Most of these strategies use traffic data collected on several points in the system, aggregate them in certain aggregation interval and calculate tolls based on them. Some strategies derive performance measures (as traffic density) based on aggregated data, and define tolls. However, derived performance measures tend to underestimate traffic conditions and data aggregation interval can smooth traffic data. On the other hand, travel time has not been utilized in order to calculate user tolls on such systems, and yet it can directly measure users delay in the system, and directly capture field conditions. In addition, technology to collect travel times is becoming more popular and used in transportation systems. Hence, this study aims to test alternative methods for toll calculation that will rely on travel time data and compare their performance with currently utilized toll calculation algorithm on I-95 Express lanes in South Florida.
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Date Issued: 2019
PURL: http://purl.flvc.org/fau/fd/FA00013335
Subject Headings: Tolls, Interstate 95, Toll roads--Florida
Format: Document (PDF)

Title: Innovative web applications for analyzing traffic operations.
Creator: Petrovska, Natasha, Furht, Borko, Stevanovic, Aleksandar, Florida Atlantic University, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description: The road traffic along with other key infrastructure sectors such as telecommunication, power, etc. has an important role in economic and technological growth of one country. Traffic engineers and analysts are responsible for solving a diversity of traffic problems, such as traffic data acquisition and evaluation. In response to the need to improve traffic operation, researchers implement advanced technologies and integration of systems and data, and develop state-of-the-art applications....
Show moreThe road traffic along with other key infrastructure sectors such as telecommunication, power, etc. has an important role in economic and technological growth of one country. Traffic engineers and analysts are responsible for solving a diversity of traffic problems, such as traffic data acquisition and evaluation. In response to the need to improve traffic operation, researchers implement advanced technologies and integration of systems and data, and develop state-of-the-art applications. This thesis introduces three novel web applications with an aim to offer traffic operators, managers, and analysts’ possibility to monitor the congestion, and analyze incidents and signal performance measures. They offer more detailed analysis providing users with insights from different levels and perspectives. The benefit of providing these visualization tools is more efficient estimation of the performance of local networks, thus facilitating the decision making process in case of emergency events.
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Date Issued: 2015
PURL: http://purl.flvc.org/fau/fd/FA00004459, http://purl.flvc.org/fau/fd/FA00004459
Subject Headings: Application program interfaces (Computer software), Internet -- Mathematical models, Traffic congestion -- Management, Traffic estimation -- Computer simulation, Transportation demand -- Forecasting
Format: Document (PDF)

FAU Theses and Dissertations (10)	+ -
FAU Graduate Student Research (2)	+ -

Traffic signal timing (2)	+ -
Traffic signs and signals--Automatic control (2)	+ -
Adaptive control systems (1)	+ -
Application program interfaces (Computer software) (1)	+ -
Digital control systems (1)	+ -

Digital integrated circuits -- Design and construction (1)	+ -
Electronic traffic controls -- Evaluation (1)	+ -
Freight and freightage (1)	+ -
Hardware in the loop simulation (1)	+ -
Highway communications. (1)	+ -
Highway engineering -- Safety measures (1)	+ -
Intelligent transportation systems (1)	+ -
Intelligent transportation systems. (1)	+ -
Internet -- Mathematical models (1)	+ -
Interstate 95 (1)	+ -
Microsimulation (1)	+ -
Multiuser detection (Telecommunication) (1)	+ -
Pedestrians (1)	+ -
Railroads, Local and light--Utah--Salt Lake City Metropolitan Area (1)	+ -
Roads -- Safety measures -- Evaluation (1)	+ -
Signalized intersections (1)	+ -
Stochastic optimization (1)	+ -
Toll roads--Florida (1)	+ -
Tolls (1)	+ -
Traffic engineering (1)	+ -
Traffic engineering -- Technological innovations (1)	+ -
Traffic estimation (1)	+ -
Traffic estimation -- Computer simulation (1)	+ -
Traffic estimation -- Mathematical models (1)	+ -
Traffic flow (1)	+ -

Electronic Thesis or Dissertation (10)	+ -
abstract (1)	+ -
poster (1)	+ -

Stevanovic, Aleksandar (12)	+ -
College of Engineering and Computer Science (10)	+ -
Florida Atlantic University (10)	+ -
Department of Civil, Environmental and Geomatics Engineering (9)	+ -
Graduate College (2)	+ -

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