The document discusses fuzzy logic and its application in determining thresholds for traffic flow parameters. It provides context on fuzzy logic and fuzzy input. It then discusses literature on using fuzzy logic to set thresholds for factors like traffic density, speed, and congestion. The literature emphasizes dynamic adjustment of thresholds based on real-time traffic conditions. The document aims to determine an optimal range of thresholds for traffic flow parameters using fuzzy logic models to handle uncertainty in a way that mimics human reasoning. It reviews recent related studies and discusses challenges and potential future directions for research.
This document outlines a study to identify the range of thresholds for fuzzy inputs in traffic flow. It begins with the aim and objectives, which are to review literature on fuzzy logic applications in traffic engineering and understand traffic flow conditions and parameters. It then provides an overview of fuzzy logic and its applications in areas like traffic congestion, gap acceptance, overtaking, lane changing, and speed limits. Thresholds identified from various studies are presented. The document demonstrates a fuzzy logic model for traffic congestion detection in MATLAB. It concludes that identifying threshold ranges can help traffic managers maintain efficient flow and addresses unanswered questions and recommendations for future research.
This document presents a student's research on defining the range of threshold values for fuzzy inputs in a traffic flow system. It discusses key concepts like fuzzy logic, thresholds, and common traffic flow parameters. It then provides hypothetical examples of threshold ranges for the linguistic variables "speed", "volume", and "density" based on factors like road type and traffic regulations. The conclusion recommends validating the fuzzy logic system with real data, getting expert input, and continuously refining the system based on monitoring. The goal is to develop a responsive traffic control system using fuzzy logic.
This document provides an introduction, literature review, and discussion of determining the range of thresholds for fuzzy input in traffic flow modeling. It discusses how fuzzy logic can be used to represent traffic parameters like density, speed, and volume linguistically rather than with precise values. The document explores applications of fuzzy logic in traffic management, advantages and disadvantages, and recommends a multidimensional analysis using data, simulations, and machine learning to establish effective threshold ranges that capture traffic dynamics.
OKPANACHI JONATHAN ; A STUDY OF FUZZY LOGIC AS THRESHOLD FOR TRAFFIC INPUT.pptxJonathanOkpanachi
This document discusses a study to identify the range of thresholds for fuzzy input in traffic flow modeling. It discusses how fuzzy logic allows traffic management systems to consider imprecise data when modeling traffic. The study aims to optimize these systems by accurately identifying input thresholds, which can improve precision and efficiency of traffic control strategies. Identifying appropriate fuzzy input thresholds is important for enhancing decision-making, machine learning, and robust control systems. The document outlines the research objectives and concepts of traffic flow that are important to manage, such as density, speed, flow rate and congestion. It also discusses challenges in modeling traffic and benefits of using fuzzy logic for its dynamic and complex nature.
OKPANACHI JONATHAN ; A STUDY OF FUZZY LOGIC AS THRESHOLD FOR TRAFFIC INPUT.pptxJonathanOkpanachi
This document discusses a study to identify the range of thresholds for fuzzy input in traffic flow modeling. It discusses how fuzzy logic allows traffic management systems to consider imprecise data when modeling traffic. The study aims to optimize these systems by accurately identifying input thresholds, which can improve precision and efficiency of traffic control strategies. Identifying appropriate fuzzy input thresholds is important for enhancing decision-making, machine learning, and robust control systems. The document outlines the research objectives and concepts of traffic flow that are important to management, such as density, speed, flow rate and congestion. It also discusses challenges in modeling traffic and benefits of using fuzzy logic for its dynamic and complex nature.
RANGE OF THRESHOLDS FOR FUZZY INPUTS IN THE TRAFFIC FLOW BY BELLO SULEIMAN86subell
This document discusses fuzzy logic approaches for modeling traffic flow. It explains that fuzzy logic can help capture the uncertainty inherent in traffic data by representing variables like traffic density or speed as fuzzy sets with membership functions. Thresholds define the boundaries between these fuzzy sets and their appropriate range depends on the specific application and input data. The document reviews different studies that use fuzzy logic systems with input thresholds to develop traffic control systems, concluding that fuzzy logic is effective for traffic modeling and control when thresholds are chosen carefully.
This document reviews a fuzzy logic-based microscopic traffic simulation model. It discusses how fuzzy logic can be applied to problems in traffic engineering that involve uncertainty, such as incident detection and congestion modeling. The review examines literature on using fuzzy set theory for incident detection algorithms. It also discusses problems with current research in the area and potential future directions, such as incorporating fuzzy logic into lane changing rules in microscopic models. The conclusion is that fuzzy logic approaches to traffic signal control can better handle high congestion and uneven traffic flows compared to traditional controls.
A Presentation of fuzzy input. To model and analyze traffic flow, different approaches have been proposed, such as mathematical, statistical, simulation, and artificial intelligence methods. One of the artificial intelligence methods that has been applied to traffic flow is fuzzy logic, which is a form of multi-valued logic that deals with uncertainty, vagueness, and imprecision.
This document outlines a study to identify the range of thresholds for fuzzy inputs in traffic flow. It begins with the aim and objectives, which are to review literature on fuzzy logic applications in traffic engineering and understand traffic flow conditions and parameters. It then provides an overview of fuzzy logic and its applications in areas like traffic congestion, gap acceptance, overtaking, lane changing, and speed limits. Thresholds identified from various studies are presented. The document demonstrates a fuzzy logic model for traffic congestion detection in MATLAB. It concludes that identifying threshold ranges can help traffic managers maintain efficient flow and addresses unanswered questions and recommendations for future research.
This document presents a student's research on defining the range of threshold values for fuzzy inputs in a traffic flow system. It discusses key concepts like fuzzy logic, thresholds, and common traffic flow parameters. It then provides hypothetical examples of threshold ranges for the linguistic variables "speed", "volume", and "density" based on factors like road type and traffic regulations. The conclusion recommends validating the fuzzy logic system with real data, getting expert input, and continuously refining the system based on monitoring. The goal is to develop a responsive traffic control system using fuzzy logic.
This document provides an introduction, literature review, and discussion of determining the range of thresholds for fuzzy input in traffic flow modeling. It discusses how fuzzy logic can be used to represent traffic parameters like density, speed, and volume linguistically rather than with precise values. The document explores applications of fuzzy logic in traffic management, advantages and disadvantages, and recommends a multidimensional analysis using data, simulations, and machine learning to establish effective threshold ranges that capture traffic dynamics.
OKPANACHI JONATHAN ; A STUDY OF FUZZY LOGIC AS THRESHOLD FOR TRAFFIC INPUT.pptxJonathanOkpanachi
This document discusses a study to identify the range of thresholds for fuzzy input in traffic flow modeling. It discusses how fuzzy logic allows traffic management systems to consider imprecise data when modeling traffic. The study aims to optimize these systems by accurately identifying input thresholds, which can improve precision and efficiency of traffic control strategies. Identifying appropriate fuzzy input thresholds is important for enhancing decision-making, machine learning, and robust control systems. The document outlines the research objectives and concepts of traffic flow that are important to manage, such as density, speed, flow rate and congestion. It also discusses challenges in modeling traffic and benefits of using fuzzy logic for its dynamic and complex nature.
OKPANACHI JONATHAN ; A STUDY OF FUZZY LOGIC AS THRESHOLD FOR TRAFFIC INPUT.pptxJonathanOkpanachi
This document discusses a study to identify the range of thresholds for fuzzy input in traffic flow modeling. It discusses how fuzzy logic allows traffic management systems to consider imprecise data when modeling traffic. The study aims to optimize these systems by accurately identifying input thresholds, which can improve precision and efficiency of traffic control strategies. Identifying appropriate fuzzy input thresholds is important for enhancing decision-making, machine learning, and robust control systems. The document outlines the research objectives and concepts of traffic flow that are important to management, such as density, speed, flow rate and congestion. It also discusses challenges in modeling traffic and benefits of using fuzzy logic for its dynamic and complex nature.
RANGE OF THRESHOLDS FOR FUZZY INPUTS IN THE TRAFFIC FLOW BY BELLO SULEIMAN86subell
This document discusses fuzzy logic approaches for modeling traffic flow. It explains that fuzzy logic can help capture the uncertainty inherent in traffic data by representing variables like traffic density or speed as fuzzy sets with membership functions. Thresholds define the boundaries between these fuzzy sets and their appropriate range depends on the specific application and input data. The document reviews different studies that use fuzzy logic systems with input thresholds to develop traffic control systems, concluding that fuzzy logic is effective for traffic modeling and control when thresholds are chosen carefully.
This document reviews a fuzzy logic-based microscopic traffic simulation model. It discusses how fuzzy logic can be applied to problems in traffic engineering that involve uncertainty, such as incident detection and congestion modeling. The review examines literature on using fuzzy set theory for incident detection algorithms. It also discusses problems with current research in the area and potential future directions, such as incorporating fuzzy logic into lane changing rules in microscopic models. The conclusion is that fuzzy logic approaches to traffic signal control can better handle high congestion and uneven traffic flows compared to traditional controls.
A Presentation of fuzzy input. To model and analyze traffic flow, different approaches have been proposed, such as mathematical, statistical, simulation, and artificial intelligence methods. One of the artificial intelligence methods that has been applied to traffic flow is fuzzy logic, which is a form of multi-valued logic that deals with uncertainty, vagueness, and imprecision.
Fuzzy Logic Model for Traffic CongestionIOSR Journals
Abstract: Traffic congestion has become a serious problem in the urban districts. This is mainly due to the
rapid increase in the number and the use of vehicles. Travel time, travel safety, environmental quality, and life
quality are all adversely affected by traffic congestion. Many traffic control systems have been developed and
installed to alleviate the problem with limited success. Traffic demands are still high and increasing. The main
focus of this report is to introduce a versatile fuzzy logic traffic flow model capable of making optimal traffic
predictions. This model can be used to evaluate various traffic-light timing plans. More importantly, it provides
a framework for implementing adaptive traffic signal controllers based on fuzzy logic technology. When
implemented it solved the problem of waiting time, travel cost, accident, traffic congestion.
Key words: Traffic Congestion, fuzzy logic, Traffic Density, fuzzy controller, conventional controller.
The document discusses fuzzy logic models for traffic flow simulation. It begins by noting the problems of urban transportation and motivations for minimizing traffic and accidents. It then discusses the literature on traffic modeling, including fuzzy logic microscopic simulation models introduced in 1992. The rest of the document details fuzzy logic models, their limitations, and potential future directions like fuzzy inference systems and neuro-fuzzy approaches to better account for human factors in traffic modeling.
Zainab Sani Shehu presented on identifying the optimal range of thresholds for fuzzy input parameters in traffic flow modeling. Key fuzzy inputs for traffic include density, volume, speed, and reaction time. Determining the threshold ranges allows the fuzzy system to more accurately represent traffic conditions and make effective decisions. The presentation analyzed different threshold ranges for various traffic flow parameters based on historical data analysis and outlined applications of fuzzy input modeling like traffic light control and route planning.
IRJET-To Analyze Calibration of Car-Following Behavior of VehiclesIRJET Journal
This document analyzes the calibration of car-following behavior for vehicles. It discusses how car-following models are used in traffic simulations and the importance of choosing input parameters that accurately reflect real-world driver behavior. The document also examines how connectivity between vehicles can provide information to drivers to improve decision-making and safety. It proposes using percolation theory to model how communication range and vehicle density affect information availability and therefore traffic flow stability, especially with connected and autonomous vehicles. The goal is to develop a more accurate understanding of how connectivity impacts traffic behavior.
RANGE OF THRESHOLD FOR FUZZY INPUT IN TRAFFIC FLOWAlhamduKure
This document discusses the use of fuzzy logic in traffic flow modeling. It explains that fuzzy logic can help deal with imprecise factors like vehicle density, traffic volume, speed differential, and reaction time. It proposes ranges of thresholds for these factors, like low, moderate, and high density. The document recommends using real data and integrating technologies like machine learning to better determine accurate threshold ranges in fuzzy traffic modeling and ensure ideal vehicle experiences.
This document summarizes research on inter-vehicular communication using packet network theory. It discusses how vehicle-to-vehicle and vehicle-to-infrastructure communication can improve road safety and efficiency. The paper proposes using localization techniques combined with GPS to determine vehicle positions, and applying congestion algorithms to decongest traffic lanes. It also outlines algorithms for lane detection, pedestrian detection, and modifying Dijkstra's algorithm for optimal vehicle routing.
The document summarizes research on handoff processes in heterogeneous wireless networks and proposes directions for future work. It introduces the need for efficient handoff algorithms to maximize user satisfaction and network resource usage. The author's proposed scheme uses fuzzy logic to estimate when handoffs are necessary and to select target networks based on criteria like predicted signal strength and quality of service metrics. Simulations show this scheme reduces unnecessary handoffs and increases connection time with preferred networks compared to traditional algorithms. Future work may integrate handoff optimization with other resource management tasks, improve the scheme's efficiency for different traffic types, and test the algorithm using real network conditions and specific wireless technologies.
Adaptive traffic lights based on traffic flow prediction using machine learni...IJECEIAES
This document discusses using machine learning algorithms to predict traffic flow and reduce congestion at intersections. It compares linear regression, random forest regressor, decision tree regressor, gradient boosting regressor, and K-neighbor regressor models on a UK road traffic dataset. All models performed well according to evaluation metrics, indicating they are suitable for an adaptive traffic light system. The system was implemented using a random forest regressor model and simulations showed it reduced traffic congestion by 30.8%, justifying its effectiveness.
An efficient vertical handoff mechanism for future mobile networkBasil John
This document proposes a novel fuzzy logic based vertical handoff decision algorithm for heterogeneous wireless networks. It introduces a speed-adaptive system discovery scheme to improve the update rate of candidate networks based on the mobile terminal's speed. It also includes a pre-handoff decision method to quickly filter candidate networks and reduce unnecessary handoffs. The key aspects of the proposed algorithm are: 1) It uses a speed-adaptive scheme to dynamically adjust the discovery of candidate networks. 2) It employs a pre-handoff decision method to filter networks and reduce ping-pong effects. 3) It applies fuzzy logic to evaluate multiple parameters like bandwidth, RSS, and cost to select the best network. Simulations show it outperforms traditional RSS-based
The document discusses approaches for providing accurate and robust traffic forecasts using empirical data. It describes two main types of empirical approaches: basic forecast approaches that use individual prediction models, and combined forecast approaches that combine different forecasts into a single prediction. Basic approaches can be parametric (e.g. linear regression) or non-parametric (e.g. neural networks), while combined approaches aim to improve accuracy by incorporating each model's unique strengths. The document provides an overview of various techniques within each category.
A vertical handover decision approaches in next generation wireless networks ...ijmnct
In next generation wireless network the most desirable feature is its ability to move seamlessly over various
access network regardless of the network infrastructure is used. The handover between these dissimilar
networks can be explored by using vertical handover algorithms. This paper focuses on the vertical
handover decision methods and algorithms effectiveness. Most of the algorithms which are based on RSS
values provide vertical handover with small delay at a lower rate of throughput. There are such algorithms
which provide significant improvements in throughput but at a cost of higher delays. As per the need for the
real time applications in next generation wireless networks there is a requirement of developing new
optimized algorithms that are able to produce high throughput and minimizing signalling cost and delay.
In ad hoc networks, routing plays a pertinent role. Deploying the appropriate routing protocol is very important in order to achieve best routing performance and reliability. Equally important is the mobility model that is used in the routing protocol. Various mobility models are available and each can have different impact on the performance of the routing protocol. In this paper, we focus on this issue by examining how the routing protocol, Optimized Link State Routing protocol, behaves as the mobility model is varied. For this, three random mobility models, viz., random waypoint, random walk and random direction are considered. The performance metrics used for assessment of Optimized Link State Routing protocol are throughput, end-to-end delay and packet delivery ratio.
In ad hoc networks, routing plays a pertinent role. Deploying the appropriate routing protocol is very important in order to achieve best routing performance and reliability. Equally important is the mobility model that is used in the routing protocol. Various mobility models are available and each can have different impact on the performance of the routing protocol. In this paper, we focus on this issue by examining how the routing protocol, Optimized Link State Routing protocol, behaves as the mobility model is varied. For this, three random mobility models, viz., random waypoint, random walk and random direction are considered. The performance metrics used for assessment of Optimized Link State Routing protocol are Optimized Link State Routing protocol, end-to-end delay and packet delivery ratio.
A Review on Traffic Classification Methods in WSNIJARIIT
In a wireless network it is very important to provide the network security and quality of service. To achieve these parameters there must be proper traffic classification in the wireless network. There are many algorithms used such as port number, deep packet inspection as the earlier methods and now days KISS, nearest cluster based classifier (NCC), SVM method and used to classify the traffic and improve the network security and quality of service of a network.
Vehicular ad hoc networks (VANETs) have seen tremendous growth in the last decade, providing a vast
range of applications in both military and civilian activities. The temporary connectivity in the vehicles can also
increase the driver’s capability on the road. However, such applications require heavy data packets to be shared on
the same spectrum without the requirement of excessive radios. Thus, e-client approaches are required which can
provide improved data dissemination along with the better quality of services to allow heavy traffic to be easily
shared between the vehicles. In this paper, an e-client data dissemination approach is proposed which not only
improves the vehicle to vehicle connectivity but also improves the QoS between the source and the destination. The
proposed approach is analyzed and compared with the existing state-of-the-art approaches. The effectiveness of the
proposed approach is demonstrated in terms of the significant gains attained in the parameters namely, end to end
delay, packet delivery ratio, route acquisition time, throughput, and message dissemination rate in comparison with
the existing approaches.
Traffic Prediction from Street Network images.pptxchirantanGupta1
While considering the spatial and temporal features of traffic, capturing the impacts of various external factors on travel is an essential step towards achieving accurate traffic forecasting. However, existing studies seldom consider external factors or neglect the effect of the complex correlations among external factors on traffic. Intuitively, knowledge graphs can naturally describe these correlations. Since knowledge graphs and traffic networks are essentially heterogeneous networks, it is challenging to integrate the information in both networks. On this background, this study presents a knowledge representation-driven traffic forecasting method based on spatial-temporal graph convolutional networks.
Comparative study of traffic signals with and without signal coordination of ...IRJET Journal
This document presents a study that compares traffic signals with and without signal coordination at various intersections.
The study focuses on quantifying congestion at intersections by updating signal timing to improve intersection capacity, reduce delays, and enhance overall traffic efficiency. Signal coordination is identified as the most effective method to maximize vehicle flow across intersections with minimum stops and accidents.
The study designs traffic signals for various intersections based on field data using Webster's method. Signal timing and offsets are theoretically coordinated for a route between intersections to establish a green wave bandwidth. Simulation results show that with coordination, delays, queue lengths and fuel consumption are reduced compared to without coordination.
Comparative study of traffic signals with and without signal coordination of ...IRJET Journal
1) The document presents a comparative study of traffic signals with and without signal coordination at various intersections. It aims to quantify congestion and update signal timing to improve traffic flow.
2) A literature review is presented on previous studies related to signal optimization and coordination. Simulation software is used to model traffic behavior and coordinate signal timing.
3) Field data on traffic volume and speed is collected. Signals are designed using Webster's method and coordinated theoretically to maximize green bandwidth. Simulation results show reduced delays, queue lengths and fuel consumption with coordination.
This document provides a review of fuzzy microscopic traffic flow models. It discusses how fuzzy logic can be used to model traffic flow and driver behavior by introducing uncertainty into variables like speed and headway. It describes fuzzy cellular automata models that represent traffic as vehicles characterized by fuzzy numbers for position and velocity. It also covers fuzzy logic car-following models that use linguistic terms and rules to model car-following behavior, and fuzzy route choice models that calculate possibility indexes to determine the most likely route. The goal of these fuzzy models is to more realistically simulate traffic flow and account for the imprecise nature of traffic data.
This document provides an overview of a student's assignment reviewing fuzzy microscopic traffic flow models. It discusses how fuzzy logic can be used to introduce uncertainty into traffic simulation models to better reflect real-world conditions. It reviews different types of fuzzy microscopic models, including fuzzy cellular models that use fuzzy numbers to represent vehicle parameters and transitions between time steps, and fuzzy logic car-following models that use fuzzy reasoning and linguistic terms to describe driver behavior. The goal is to understand how these fuzzy microscopic models work.
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024Sinan KOZAK
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
Fuzzy Logic Model for Traffic CongestionIOSR Journals
Abstract: Traffic congestion has become a serious problem in the urban districts. This is mainly due to the
rapid increase in the number and the use of vehicles. Travel time, travel safety, environmental quality, and life
quality are all adversely affected by traffic congestion. Many traffic control systems have been developed and
installed to alleviate the problem with limited success. Traffic demands are still high and increasing. The main
focus of this report is to introduce a versatile fuzzy logic traffic flow model capable of making optimal traffic
predictions. This model can be used to evaluate various traffic-light timing plans. More importantly, it provides
a framework for implementing adaptive traffic signal controllers based on fuzzy logic technology. When
implemented it solved the problem of waiting time, travel cost, accident, traffic congestion.
Key words: Traffic Congestion, fuzzy logic, Traffic Density, fuzzy controller, conventional controller.
The document discusses fuzzy logic models for traffic flow simulation. It begins by noting the problems of urban transportation and motivations for minimizing traffic and accidents. It then discusses the literature on traffic modeling, including fuzzy logic microscopic simulation models introduced in 1992. The rest of the document details fuzzy logic models, their limitations, and potential future directions like fuzzy inference systems and neuro-fuzzy approaches to better account for human factors in traffic modeling.
Zainab Sani Shehu presented on identifying the optimal range of thresholds for fuzzy input parameters in traffic flow modeling. Key fuzzy inputs for traffic include density, volume, speed, and reaction time. Determining the threshold ranges allows the fuzzy system to more accurately represent traffic conditions and make effective decisions. The presentation analyzed different threshold ranges for various traffic flow parameters based on historical data analysis and outlined applications of fuzzy input modeling like traffic light control and route planning.
IRJET-To Analyze Calibration of Car-Following Behavior of VehiclesIRJET Journal
This document analyzes the calibration of car-following behavior for vehicles. It discusses how car-following models are used in traffic simulations and the importance of choosing input parameters that accurately reflect real-world driver behavior. The document also examines how connectivity between vehicles can provide information to drivers to improve decision-making and safety. It proposes using percolation theory to model how communication range and vehicle density affect information availability and therefore traffic flow stability, especially with connected and autonomous vehicles. The goal is to develop a more accurate understanding of how connectivity impacts traffic behavior.
RANGE OF THRESHOLD FOR FUZZY INPUT IN TRAFFIC FLOWAlhamduKure
This document discusses the use of fuzzy logic in traffic flow modeling. It explains that fuzzy logic can help deal with imprecise factors like vehicle density, traffic volume, speed differential, and reaction time. It proposes ranges of thresholds for these factors, like low, moderate, and high density. The document recommends using real data and integrating technologies like machine learning to better determine accurate threshold ranges in fuzzy traffic modeling and ensure ideal vehicle experiences.
This document summarizes research on inter-vehicular communication using packet network theory. It discusses how vehicle-to-vehicle and vehicle-to-infrastructure communication can improve road safety and efficiency. The paper proposes using localization techniques combined with GPS to determine vehicle positions, and applying congestion algorithms to decongest traffic lanes. It also outlines algorithms for lane detection, pedestrian detection, and modifying Dijkstra's algorithm for optimal vehicle routing.
The document summarizes research on handoff processes in heterogeneous wireless networks and proposes directions for future work. It introduces the need for efficient handoff algorithms to maximize user satisfaction and network resource usage. The author's proposed scheme uses fuzzy logic to estimate when handoffs are necessary and to select target networks based on criteria like predicted signal strength and quality of service metrics. Simulations show this scheme reduces unnecessary handoffs and increases connection time with preferred networks compared to traditional algorithms. Future work may integrate handoff optimization with other resource management tasks, improve the scheme's efficiency for different traffic types, and test the algorithm using real network conditions and specific wireless technologies.
Adaptive traffic lights based on traffic flow prediction using machine learni...IJECEIAES
This document discusses using machine learning algorithms to predict traffic flow and reduce congestion at intersections. It compares linear regression, random forest regressor, decision tree regressor, gradient boosting regressor, and K-neighbor regressor models on a UK road traffic dataset. All models performed well according to evaluation metrics, indicating they are suitable for an adaptive traffic light system. The system was implemented using a random forest regressor model and simulations showed it reduced traffic congestion by 30.8%, justifying its effectiveness.
An efficient vertical handoff mechanism for future mobile networkBasil John
This document proposes a novel fuzzy logic based vertical handoff decision algorithm for heterogeneous wireless networks. It introduces a speed-adaptive system discovery scheme to improve the update rate of candidate networks based on the mobile terminal's speed. It also includes a pre-handoff decision method to quickly filter candidate networks and reduce unnecessary handoffs. The key aspects of the proposed algorithm are: 1) It uses a speed-adaptive scheme to dynamically adjust the discovery of candidate networks. 2) It employs a pre-handoff decision method to filter networks and reduce ping-pong effects. 3) It applies fuzzy logic to evaluate multiple parameters like bandwidth, RSS, and cost to select the best network. Simulations show it outperforms traditional RSS-based
The document discusses approaches for providing accurate and robust traffic forecasts using empirical data. It describes two main types of empirical approaches: basic forecast approaches that use individual prediction models, and combined forecast approaches that combine different forecasts into a single prediction. Basic approaches can be parametric (e.g. linear regression) or non-parametric (e.g. neural networks), while combined approaches aim to improve accuracy by incorporating each model's unique strengths. The document provides an overview of various techniques within each category.
A vertical handover decision approaches in next generation wireless networks ...ijmnct
In next generation wireless network the most desirable feature is its ability to move seamlessly over various
access network regardless of the network infrastructure is used. The handover between these dissimilar
networks can be explored by using vertical handover algorithms. This paper focuses on the vertical
handover decision methods and algorithms effectiveness. Most of the algorithms which are based on RSS
values provide vertical handover with small delay at a lower rate of throughput. There are such algorithms
which provide significant improvements in throughput but at a cost of higher delays. As per the need for the
real time applications in next generation wireless networks there is a requirement of developing new
optimized algorithms that are able to produce high throughput and minimizing signalling cost and delay.
In ad hoc networks, routing plays a pertinent role. Deploying the appropriate routing protocol is very important in order to achieve best routing performance and reliability. Equally important is the mobility model that is used in the routing protocol. Various mobility models are available and each can have different impact on the performance of the routing protocol. In this paper, we focus on this issue by examining how the routing protocol, Optimized Link State Routing protocol, behaves as the mobility model is varied. For this, three random mobility models, viz., random waypoint, random walk and random direction are considered. The performance metrics used for assessment of Optimized Link State Routing protocol are throughput, end-to-end delay and packet delivery ratio.
In ad hoc networks, routing plays a pertinent role. Deploying the appropriate routing protocol is very important in order to achieve best routing performance and reliability. Equally important is the mobility model that is used in the routing protocol. Various mobility models are available and each can have different impact on the performance of the routing protocol. In this paper, we focus on this issue by examining how the routing protocol, Optimized Link State Routing protocol, behaves as the mobility model is varied. For this, three random mobility models, viz., random waypoint, random walk and random direction are considered. The performance metrics used for assessment of Optimized Link State Routing protocol are Optimized Link State Routing protocol, end-to-end delay and packet delivery ratio.
A Review on Traffic Classification Methods in WSNIJARIIT
In a wireless network it is very important to provide the network security and quality of service. To achieve these parameters there must be proper traffic classification in the wireless network. There are many algorithms used such as port number, deep packet inspection as the earlier methods and now days KISS, nearest cluster based classifier (NCC), SVM method and used to classify the traffic and improve the network security and quality of service of a network.
Vehicular ad hoc networks (VANETs) have seen tremendous growth in the last decade, providing a vast
range of applications in both military and civilian activities. The temporary connectivity in the vehicles can also
increase the driver’s capability on the road. However, such applications require heavy data packets to be shared on
the same spectrum without the requirement of excessive radios. Thus, e-client approaches are required which can
provide improved data dissemination along with the better quality of services to allow heavy traffic to be easily
shared between the vehicles. In this paper, an e-client data dissemination approach is proposed which not only
improves the vehicle to vehicle connectivity but also improves the QoS between the source and the destination. The
proposed approach is analyzed and compared with the existing state-of-the-art approaches. The effectiveness of the
proposed approach is demonstrated in terms of the significant gains attained in the parameters namely, end to end
delay, packet delivery ratio, route acquisition time, throughput, and message dissemination rate in comparison with
the existing approaches.
Traffic Prediction from Street Network images.pptxchirantanGupta1
While considering the spatial and temporal features of traffic, capturing the impacts of various external factors on travel is an essential step towards achieving accurate traffic forecasting. However, existing studies seldom consider external factors or neglect the effect of the complex correlations among external factors on traffic. Intuitively, knowledge graphs can naturally describe these correlations. Since knowledge graphs and traffic networks are essentially heterogeneous networks, it is challenging to integrate the information in both networks. On this background, this study presents a knowledge representation-driven traffic forecasting method based on spatial-temporal graph convolutional networks.
Comparative study of traffic signals with and without signal coordination of ...IRJET Journal
This document presents a study that compares traffic signals with and without signal coordination at various intersections.
The study focuses on quantifying congestion at intersections by updating signal timing to improve intersection capacity, reduce delays, and enhance overall traffic efficiency. Signal coordination is identified as the most effective method to maximize vehicle flow across intersections with minimum stops and accidents.
The study designs traffic signals for various intersections based on field data using Webster's method. Signal timing and offsets are theoretically coordinated for a route between intersections to establish a green wave bandwidth. Simulation results show that with coordination, delays, queue lengths and fuel consumption are reduced compared to without coordination.
Comparative study of traffic signals with and without signal coordination of ...IRJET Journal
1) The document presents a comparative study of traffic signals with and without signal coordination at various intersections. It aims to quantify congestion and update signal timing to improve traffic flow.
2) A literature review is presented on previous studies related to signal optimization and coordination. Simulation software is used to model traffic behavior and coordinate signal timing.
3) Field data on traffic volume and speed is collected. Signals are designed using Webster's method and coordinated theoretically to maximize green bandwidth. Simulation results show reduced delays, queue lengths and fuel consumption with coordination.
This document provides a review of fuzzy microscopic traffic flow models. It discusses how fuzzy logic can be used to model traffic flow and driver behavior by introducing uncertainty into variables like speed and headway. It describes fuzzy cellular automata models that represent traffic as vehicles characterized by fuzzy numbers for position and velocity. It also covers fuzzy logic car-following models that use linguistic terms and rules to model car-following behavior, and fuzzy route choice models that calculate possibility indexes to determine the most likely route. The goal of these fuzzy models is to more realistically simulate traffic flow and account for the imprecise nature of traffic data.
This document provides an overview of a student's assignment reviewing fuzzy microscopic traffic flow models. It discusses how fuzzy logic can be used to introduce uncertainty into traffic simulation models to better reflect real-world conditions. It reviews different types of fuzzy microscopic models, including fuzzy cellular models that use fuzzy numbers to represent vehicle parameters and transitions between time steps, and fuzzy logic car-following models that use fuzzy reasoning and linguistic terms to describe driver behavior. The goal is to understand how these fuzzy microscopic models work.
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Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024Sinan KOZAK
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
Introduction- e - waste – definition - sources of e-waste– hazardous substances in e-waste - effects of e-waste on environment and human health- need for e-waste management– e-waste handling rules - waste minimization techniques for managing e-waste – recycling of e-waste - disposal treatment methods of e- waste – mechanism of extraction of precious metal from leaching solution-global Scenario of E-waste – E-waste in India- case studies.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
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THRESHOLD RANGE FOR TRAFFIC FLOW PARAMETERS USING FUZZY LOGIC.pdf
1. BAYERO UNIVERSITY KANO
FACULTY OF ENGINEERING
Identification of the Range of Threshold for Fuzzy Input in Traffic Flow
By
Yusuf Musa Yerima
SPS/21/MCE/00027
Submitted To
Engr. Prof. H.M. Alhassan
November, 2023
DEPARTMENT OF CIVIL ENGINEERING
CIV8331: Advance Traffic Engineering
Assignment On:
2. WHAT IS FUZZY LOGIC AND INPUT?
• Fuzzy logic is a mathematical framework that deals with reasoning and
decision-making under uncertainty. Unlike traditional binary logic (true or
false), fuzzy logic allows for degrees of truth between 0 and 1. It's often used
in control systems, artificial intelligence, and various applications where
imprecise or ambiguous information needs to be considered.
• Fuzzy input refers to input data or information that is imprecise or has
uncertainty associated with it. In fuzzy logic systems, input variables can take
on a range of values with degrees of membership in different fuzzy sets. This
allows the system to handle and process information that may not have clear-
cut boundaries, enabling a more flexible and realistic representation of certain
types of data.
4. INTRODUCTION
• Since 1965 when the fuzzy logic and fuzzy algebra were introduced
by Lotfi Zadeh, the fuzzy theory successfully found its applications
in the wide range of subject fields. This is mainly due to its ability to
process various data, including vague or uncertain data, and provide
results that are suitable for the decision making.
• The increasing complexity of urban traffic systems demands
intelligent and adaptive control mechanisms to optimize traffic flow.
Fuzzy logic has emerged as a promising approach for setting
thresholds in traffic management, offering the flexibility to capture
the uncertainty inherent in real-world traffic conditions(Al-Jarrah,
O,2017)
5. INTRODUCTION (CONT.)
• Many research aimed to contribute to the evolving landscape of intelligent
traffic control by investigating the range of thresholds using fuzzy logic
through an exploration of dynamic adaptation strategies, threshold range
selection methodologies, and the integration of human behavior models.
• In a fuzzy logic system for traffic flow parameters, the range of thresholds
is defined using linguistic variables and fuzzy sets. Here are some
examples of the driver car-following behavior when entering a u-turn,
1. Distance to the Lead Vehicle:
v Fuzzy sets: Far, Medium, Close
v Linguistic rules: If the distance to the lead vehicle is "Close" then
decrease speed.
6. INTRODUCTION (CONT.)
2. Speed of the Lead Vehicle:
vFuzzy sets: Slow, Moderate, Fast
vLinguistic rules: If the lead vehicle is moving "Slow,"
then maintain a safe following distance.
3. Driver Comfort Level:
vFuzzy sets: Uncomfortable, Neutral, Comfortable
vLinguistic rules: If the driver feels "Uncomfortable" due
to the u-turn, then adjust speed and following distance.
7. INTRODUCTION (CONT.)
• These fuzzy logic examples help create a system
that can make decisions based on imprecise and
uncertain inputs. By incorporating fuzzy sets and
rules, the model can emulate human-like reasoning,
making the car-following behavior more adaptable to
varying conditions during a making u-turn.
• In summary, it’s important to note that the range of
thresholds in fuzzy logic is not fixed and can be
adjusted based on the specific needs and objectives of
the traffic flow analysis or control system.
8. PROBLEM STATEMENT
• The increasing complexity of urban traffic systems demands
intelligent and adaptive control mechanisms to optimize traffic
flow. Fuzzy logic has emerged as a promising approach for
setting thresholds in traffic management, offering the flexibility to
capture the uncertainty inherent in real-time traffic conditions by
enabling more accurate and robust analysis and decision-making
in transportation systems.
9. AIM AND OBJECTIVES
• The aim is to determine the thresholds range using fuzzy logic for traffic
flow parameters such as traffic speed, traffic density, traffic congestion and
driver behaviors in order to enhance the adaptability of traffic control
systems by incorporating a more flexible approach.
• The objective of this study is to determine using fuzzy logic models that
can handle the uncertainty and imprecision associated with traffic flow
parameters especially the fundamental traffic stream parameters (flow,
density and speed) and the driver’s behavior such as aggressiveness or
cautiousness and how such behavior can influence factors like following
distances, lane changing patterns, and reaction times.
10. LITERATURE REVIEW
• The literature on fuzzy logic applied to traffic flow thresholds
encompasses various aspects, including dynamic adaptation, optimal
selection, and integration with smart infrastructure. Notable studies
emphasize the importance of real-time adjustments in fuzzy
thresholds based on traffic conditions (Huang et al., 2018),
• Tarhini, A, (2018), Threshold values are used to determine the
membership of an element in a fuzzy set. These thresholds can vary
based on the context and the granularity of your model. Here are some
general examples of threshold ranges for traffic flow:
11. LITERATURE REVIEW (CONT.)
1. Traffic Density:
v Low: 0 to 0.3
v Moderate: 0.2 to 0.7
v High: 0.5 to 1.0
2. Traffic Speed:
v Slow: 0 to 0.4
v Moderate: 0.3 to 0.7
v Fast: 0.6 to 1.0
3. Traffic Congestion:
v Light: 0 to 0.3
v Moderate: 0.2 to 0.6
v Heavy: 0.5 to 1.0
12. LITERATURE REVIEW (CONT.)
• Al-Jarrah, O, (2017) , The specific range and terms used can be determined based
on the characteristics of the traffic system. Some common fuzzy parameters used in
traffic flow analysis include:
1. Traffic density: Fuzzy sets can be used to describe traffic density, where
membership functions represent low, moderate, and high-density levels.
2. Traffic speed: Fuzzy logic can be used to model varying speeds, such as slow,
moderate, and fast traffic speeds.
3. Traffic congestion: Fuzzy sets can describe the degree of congestion, ranging
from light congestion to heavy congestion.
4. Driver behavior: Fuzzy parameters can be used to model driver behavior, such as
aggressive, cautious, or normal driving.
5. Weather conditions: Fuzzy logic can represent weather conditions like light rain,
heavy rain, snow, and their impact on traffic flow.
13. LITERATURE REVIEW (CONT.)
• Human behavior modeling is identified as a critical factor, with
efforts directed towards integrating realistic driver reactions into
fuzzy thresholds (Chien et al., 2017).
• In summary, the literature on fuzzy logic on thresholds range for
traffic flow underscores the significance of dynamic adaptation,
optimal selection, uncertainty handling, human behavior integration,
multi-criteria decision-making, mixed traffic scenarios, smart
infrastructure integration, sensitivity analysis, and scalability.
14. CURRENT RESEARCH ON THE STUDY AREA
1. "Adaptive Threshold Determination for Fuzzy Traffic Flow Classification" by M.
Pradhan et al. (2021): The authors use a combination of fuzzy logic and
evolutionary optimization algorithms to dynamically adjust the threshold values
based on real-time traffic data. The effectiveness of the proposed approach is
evaluated using a case study in urban road networks.
2. "Fuzzy Logic-Based Traffic Flow Assessment Using Real-Time Data" by K.
Kumar et al. (2020): The study recommends a range of threshold values based on
fuzzy logic-based classification of traffic conditions. The proposed approach is
validated using traffic data collected from multiple urban areas.
15. CURRENT RESEARCH ON THE STUDY AREA (CONT.)
3. "Fuzzy Model for Traffic Flow Classification" by P. D. Ponnaganti et al.
(2019): The study focuses on determining the range of threshold values for traffic
variables, such as traffic volume, speed, and occupancy. The proposed model is
applied to real-time traffic data, and its performance is compared against
traditional traffic flow classification methods.
4. "Fuzzy Logic-Based Inference System for Traffic Flow Classification" by S.
Patra et al. (2018): The authors determine the range of thresholds for traffic
variables by considering the linguistic terms and membership functions.
• In summary, these recent studies provide insights into the use of fuzzy logic
for determining the range of thresholds in traffic flow classification. They apply
innovative approaches to dynamically adjust the thresholds based on real-time
traffic data, enhancing the accuracy and adaptability of the fuzzy logic models.
16. PROBLEMS WITH THE CURRENT RESEARCH
v Lack of consensus on threshold determination
v Subjectivity in defining membership functions
v Data availability and quality
v Limited validation and benchmarking
v Interpretation challenges
• Despite these challenges, fuzzy logic still offers valuable insights into
understanding traffic flow patterns and has been successfully applied in
various transportation systems worldwide. Researchers continue to work
on addressing these problems through advancements in methodology and
standardization efforts within the field.
17. FUTURE DIRECTIONS IN THE SUBJECT AREA
v Integration with emerging technologies
v Dynamic threshold adjustment
v Multi-modal traffic systems
v Human Behavior Integration
v Cybersecurity Concerns
• These potential future researches aim to advance the understanding
and application of fuzzy logic in addressing the complex challenges
associated with traffic flow in evolving urban environments and
real-world situations.
18. CONCLUSIONS
• The primary aim of this work is to determine the range of threshold for
fuzzy input in traffic flow parameters. Some literature has been reviewed
that dealt with the use of fuzzy logic to determine the range of threshold
for traffic flow parameters especially fundamental traffic stream
parameters (flow, density and speed) and the driver behavior such as
aggressiveness or cautiousness and how such behavior can influence
factors like following distances, lane changing patterns, and reaction
times. The study highlights the sensitivity of traffic flow parameters to
threshold values in fuzzy logic emphasizing the need for a systematic
exploration of a range of thresholds. Through systematic analysis, optimal
parameters for fuzzy logic thresholds can be identified and contribute to
the enhancement of traffic management systems.
19. RECOMMENDATIONS
v Integration with Advanced Technologies
v Continuous Threshold Monitoring
v Collaboration with Stakeholders
v Public Awareness and Education
v Security Measures
v Pilot Programs
20. REFERENCES
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Engineering Research, 8(5), 35-41.
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Transportation, 2017, 8795404.
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