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Title: Transportation operation and safety comparison between unsignalized/signalized offset t-intersections, two-lane roundabout, and modified roundabout.
Creator: Fleming, Brandon, Kaisar, Evangelos I., Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: Traditional intersections have always caused congestion, delay, and accidents. There are numerous geometric intersection designs that best fit each situation. This study performed an operational and safety comparison with unsignalized/signalized offset, Tintersections, a two-lane roundabout, and a modified roundabout to decrease the overall travel delay and increase the safety using a case study. Using data from a government source, all designs were tested in a calibrated micro simulation...
Show moreTraditional intersections have always caused congestion, delay, and accidents. There are numerous geometric intersection designs that best fit each situation. This study performed an operational and safety comparison with unsignalized/signalized offset, Tintersections, a two-lane roundabout, and a modified roundabout to decrease the overall travel delay and increase the safety using a case study. Using data from a government source, all designs were tested in a calibrated micro simulation model and traffic signals were optimized using a signal optimization platform. Each design was tested with various balancing schemes, left turn percentages, and hourly volumes to determine the failure point. The unsignalized/signalized offset T-intersections, two-lane roundabout, and modified roundabout were compared by throughputs, travel delay, and travel time. After analysis, it was determined that the modified roundabout performed the best out of any design. All approaches had minimum travel delay while reducing the number of conflict points considerably with the modified roundabout.
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Date Issued: 2014
PURL: http://purl.flvc.org/fau/fd/FA00004110, http://purl.flvc.org/fau/fd/FA00004110
Subject Headings: Roads -- Interchanges and intersections -- Safety measures, Traffic circles -- Safety measures, Traffic safety, Traffic signs and signals -- Design
Format: Document (PDF)

Title: Investigation of the impact of junctions on the frequency of road crashes in urban areas.
Creator: Kapetanakis, Konstantinos, Kaisar, Evangelos I., Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: The huge financial and societal cost associated with traffic crashes and the fact that more than half of them occur at junctions, revealed the need for further research in the field of junction safety. This research aims to investigate the quantitative impact of junctions in relation to other selected parameters, on the frequency of road crashes in urban areas in the State of Florida. Mathematical models were developed with the use of loglinear analysis method for different traffic volumes in...
Show moreThe huge financial and societal cost associated with traffic crashes and the fact that more than half of them occur at junctions, revealed the need for further research in the field of junction safety. This research aims to investigate the quantitative impact of junctions in relation to other selected parameters, on the frequency of road crashes in urban areas in the State of Florida. Mathematical models were developed with the use of loglinear analysis method for different traffic volumes in and out of junction. In addition, sensitivity analysis was performed in order to better understand the impact of selected parameters to the total number of crashes. The analysis has led to several conclusions such as that angle and left turn collisions have much higher probability of occurrence at junctions and that crashes which occur at junctions are much more probable for low and medium volumes compared to no-junctions.
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Date Issued: 2014
PURL: http://purl.flvc.org/fau/fd/FA00004128, http://purl.flvc.org/fau/fd/FA00004128
Subject Headings: Roads -- Intersections and interchanges -- Safety measures, Traffic safety -- Mathematical models
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: Geographic Routing Reliability Enhancement in Urban Vehicular Ad Hoc Networks.
Creator: Alzamzami, Ohoud, Mahgoub, Imad, Florida Atlantic University, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description: Vehicular Ad hoc Networks (VANETs) have the potential to enable various kinds of applications aiming at improving road safety and transportation efficiency. These applications require uni-cast routing, which remains a significant challenge due to VANETs characteristics. Given VANET dynamic topology, geographic routing protocols are considered the most suitable for such network due to their scalability and low overhead. However, the optimal selection of next-hop nodes in geographic routing is...
Show moreVehicular Ad hoc Networks (VANETs) have the potential to enable various kinds of applications aiming at improving road safety and transportation efficiency. These applications require uni-cast routing, which remains a significant challenge due to VANETs characteristics. Given VANET dynamic topology, geographic routing protocols are considered the most suitable for such network due to their scalability and low overhead. However, the optimal selection of next-hop nodes in geographic routing is a challenging problem where the routing performance is highly affected by the variable link quality and bandwidth availability. In this dissertation, a number of enhancements to improve geographic routing reliability in VANETs are proposed. To minimize packet losses, the direction and link quality of next-hop nodes using the Expected Transmission Count (ETX) are considered to select links with low loss ratios. To consider the available bandwidth, a cross-layer enchantment of geographic routing, which can select more reliable links and quickly react to varying nodes load and channel conditions, is proposed. We present a novel model of the dynamic behavior of a wireless link. It considers the loss ratio on a link, in addition to transmission and queuing delays, and it takes into account the physical interference e ect on the link. Then, a novel geographic routing protocol based on fuzzy logic systems, which help in coordinating di erent contradicting metrics, is proposed. Multiple metrics related to vehicles' position, direction, link quality and achievable throughput are combined using fuzzy rules in order to select the more reliable next-hop nodes for packet forwarding. Finally, we propose a novel link utility aware geographic routing protocol, which extends the local view of the network topology using two-hop neighbor information. We present our model of link utility, which measures the usefulness of a two-hop neighbor link by considering its minimum residual bandwidth and packet loss rate. The proposed protocol can react appropriately to increased network tra c and to frequent topology dis-connectivity in VANETs. To evaluate the performance of the proposed protocols, extensive simulation experiments are performed using network and urban mobility simulation tools. Results confirm the advantages of the proposed schemes in increased traffic loads and network density.
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Date Issued: 2018
PURL: http://purl.flvc.org/fau/fd/FA00013037
Subject Headings: Vehicular ad hoc networks (Computer networks), Traffic safety, Routing protocols (Computer network protocols), Fuzzy logic
Format: Document (PDF)

Title: Distracted Driving: A Cross-Disciplinary Analysis Exploring The Effectiveness Of Public Service Announcements Regarding Texting And Driving That Employ A Filmed Narrative With Emotional Appeals.
Creator: Seibold, Jeremy R., Charbonneau, Stephen, Florida Atlantic University, Dorothy F. Schmidt College of Arts and Letters, School of Communication and Multimedia Studies
Abstract/Description: Despite efforts to mitigate texting and driving in the United States, accidents as a result of distracted driving continue to increase, especially within the 16-24 age group. Considering the traits of the members of this age group, as well as the attributes of the various means that are utilized to mitigate such behavior, I hypothesize that the employment of filmed narratives in public service announcements is more effective than any other established approach. Testing the validity of this...
Show moreDespite efforts to mitigate texting and driving in the United States, accidents as a result of distracted driving continue to increase, especially within the 16-24 age group. Considering the traits of the members of this age group, as well as the attributes of the various means that are utilized to mitigate such behavior, I hypothesize that the employment of filmed narratives in public service announcements is more effective than any other established approach. Testing the validity of this hypothesis, contributing to a lack of research, three methods of analysis were employed in this project: a textual analysis of a filmed narrative; an audience analysis of the comments accompanying the filmed narrative; and a video session followed by a self-administered questionnaire. The results of this study indicate that while the filmed narrative is more effective than the spoken narrative, more intensive analyses are necessary for further speculation.
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Date Issued: 2017
PURL: http://purl.flvc.org/fau/fd/FA00004874, http://purl.flvc.org/fau/fd/FA00004874
Subject Headings: Distracted driving--Case studies., Advertising, Public service--Case studies., Text messaging (Cell phone systems), Traffic safety.
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)

Traffic safety (2)	+ -
Advertising, Public service--Case studies. (1)	+ -
Digital control systems (1)	+ -
Digital integrated circuits -- Design and construction (1)	+ -
Distracted driving--Case studies. (1)	+ -

Electronic traffic controls -- Evaluation (1)	+ -
Fuzzy logic (1)	+ -
Hardware in the loop simulation (1)	+ -
Highway engineering -- Safety measures (1)	+ -
Roads -- Interchanges and intersections -- Safety measures (1)	+ -
Roads -- Intersections and interchanges -- Safety measures (1)	+ -
Roads -- Safety measures -- Evaluation (1)	+ -
Routing protocols (Computer network protocols) (1)	+ -
Signalized intersections (1)	+ -
Text messaging (Cell phone systems) (1)	+ -
Traffic circles -- Safety measures (1)	+ -
Traffic engineering -- Technological innovations (1)	+ -
Traffic flow -- Management (1)	+ -
Traffic safety -- Mathematical models (1)	+ -
Traffic safety. (1)	+ -
Traffic signs and signals -- Control systems -- Methodology (1)	+ -
Traffic signs and signals -- Design (1)	+ -
Traffic flow management (1)	+ -
Traffic signs and signals -- Control systems -- Methodology (1)	+ -
Transportation engineering -- Technological innovations (1)	+ -
Vehicular ad hoc networks (Computer networks) (1)	+ -

Florida Atlantic University (6)	+ -
College of Engineering and Computer Science (5)	+ -
Department of Civil, Environmental and Geomatics Engineering (4)	+ -
Kaisar, Evangelos I. (2)	+ -
Stevanovic, Aleksandar (2)	+ -

Alzamzami, Ohoud (1)	+ -
Charbonneau, Stephen (1)	+ -
Department of Computer and Electrical Engineering and Computer Science (1)	+ -
Dorothy F. Schmidt College of Arts and Letters (1)	+ -
Fleming, Brandon (1)	+ -
Kapetanakis, Konstantinos (1)	+ -
Klanac, Ivica (1)	+ -
Mahgoub, Imad (1)	+ -
Ostojic, Marija (1)	+ -
School of Communication and Multimedia Studies (1)	+ -
Seibold, Jeremy R. (1)	+ -

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