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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: V. M. Kurganov;

    In this article the analysis of existing schemes of periodization of the main stages of evolution of logistics and transportation systems. Analyzes the concept of "logistics revolution", the "waves" of changes in transport infrastructure and others. Revealed and substantiated the necessity of developing a holistic concept of development of transport and logistics systems in accordance with the main stages of development of the world economy. On the basis of this study we propose an original multi-parameter classification scheme of the main stages of the development of international and regional transport systems and complexes

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Partha Sarathi Chakraborty; Arti Tiwari; Pranshu Raj Sinha;

    Rapid development of metropolitan cities into smart cities and daily increased in number of vehicles on the roads causes increase in traffic maintenance challenges such as traffic congestion, accidents, dispatching of emergency vehicle and pollution. It will suffers people travel time, delay in response time of emergency vehicle such as ambulance, fire brigade, police etc., causes heavy loss or effects society in terms of wealth, emotions and security. The research work done in the area of Intelligent Transportation Systems and Traffic Management primarily focuses on determining effectively green light duration along with dispatching of emergency vehicle. In this research paper, the authors propose an algorithm which not only determines green light duration dynamically but also handles the emergency vehicle management efficiently. The objectives of the proposed algorithm are minimizing average waiting time. It always analysis the traffic situation at traffic intersection, along with continuous monitoring of emergency vehicle arrival at different lanes causes to optimize the waiting time of vehicle in lanes. It also deals with the deadlock and starvation condition, due to arrival of emergency vehicle in repeated interval of time in traffic intersection. The security level of emergency vehicle is in consideration during dispatching that assigned and verified by authorities to preserve security measures and society values. Here, the source of input on dynamic traffic condition is collected through Wireless Sensor Networks technology.

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Mathilde François; Philippe Crave; François Osiurak; Alexandra Fort; +1 Authors

    Existing literature does not draw conclusions as to which speedometer type is better for truck driving. A digital speedometer would be more beneficial when obtaining absolute and relative readings, while an analogue speedometer would be more efficient and less distracting when detecting dynamic speed changes. Redundant speedometers, which simultaneously present digital and analogue speedometers, appear increasingly in vehicles, but no information is available on their ergonomic qualities. This study compared three speedometers: digital speedometers, analogue speedometers, and redundant speedometers. This study compared the efficiency, usability and visual distraction measures for all three types of speedometers in a simulated truck driving setting. The task-dependant results were confirmed for the digital and analogue speedometer. The redundant speedometer combined the benefits of each type presented separately, which highlights interesting theoretical and applied implications.

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Ruilin Liu; Hongzhang Liu; Daehan Kwak; Yong Xiang; +3 Authors

    Navigators based on real-time traffic conditions achieve suboptimal results since, in face of congestion, they greedily shift drivers to currently light-traffic roads and cause new traffic jams. This article presents Themis, a participatory system navigating drivers in a balanced way. By analyzing time-stamped position reports and route decisions collected from the Themis mobile app, the Themis server estimates both the current traffic rhythm and the future traffic distribution. According to the estimated travel time and a popularity score computed for each route, Themis coordinates the traffic between alternative routes and proactively alleviates congestion. Themis has been implemented and its performance has been evaluated in both a synthetic experiment using real data from over 26,000 taxis and a field study. Results from both experiments demonstrate that Themis reduces traffic congestion and average travel time at various traffic densities and system penetration rates.

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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Andrii Hnatov; Shchasiana Arhun; Hanna Hnatova; Kyrylo Tarasov; +1 Authors

    Problem. The danger posed by high-speed vehicles passing through crowded areas is extremely high. An analysis of the cause of accidents involving victims in Ukraine showed that speeding was the main cause for that in the city. Therefore, one of the main means of reducing the causes of road traffic accidents involving pedestrians is artificial road irregularities, also called «speed bumps». Goal. Development of a device for generating electricity and forcing reduction of the speed of vehicles at pedestrian crossings and other sections of the road where there is a need to reduce the speed of vehicles. Methodology. The analytical methods of research on the development and application of methods and devices for transforming the energy of the sun into electricity were used. Methods of experimental researches and mathematical methods of processing and modulation of the obtained results are used. Results. The result is the analysis of the technical solutions for the devices of forced reduction of the car speed. The design of the device of forced reduction of the car speed with the function of electricity generation is developed, as well as its schematic drawings and the schematic diagram, which are shown. The principle of operation of the developed device of forced reduction of car speed is revealed. One of the variants of the pedestrian crossing with additional lighting and laser signaling system is offered, which is equipped with devices of forced reduction of car speed with the function of electricity generation. Originality. The amount of electricity that the proposed device is able to generate is modulated (depending on the traffic intensity) from 60 kW to 400 kW. Practical value. The implementation of the proposed development into road construction will lead to the implementation of energy-efficient technologies in this field and will significantly improve road safety. Pedestrian crossings equipped with additional lighting and a laser signaling system to alert road users when using these devices will receive power from a decentralized, renewable power source.

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    Avtomobilʹnyj Transport (Harʹkov)
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      Avtomobilʹnyj Transport (Harʹkov)
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  • Authors: Perazzo, Mariana Costa, 1989-;

    Orientador: Paulo Roberto Gardel Kurka Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica Resumo: O transporte ferroviário vem buscando melhorias e soluções para se manter um modal de transporte competitivo no mercado. Por isso, torna-se necessário investimentos para aumentar a velocidade e o número de veículos nos trens, alcançando um menor tempo de viagem. Ocorre que estas mudanças aumentam a probabilidade de acidentes, principalmente em curvas e inclinações acentuadas, onde crescem os riscos de descarrilamento. Sendo a estrada de ferro o principal causador destes acidentes, é preciso realizar um estudo da geometria da via permanente para que se determine os pontos de contato entre a roda e o trilho, tornando possível determinar as forças tangentes, laterais e gravitacionais que agem no sistema. O conhecimento da geometria é importante para entender a dinâmica da composição do trem e prever as condições de operação nas vias. Diante das necessidades mencionadas o presente trabalho tem o objetivo de gerar uma Trajetória da Via em 3D, a partir de uma tabela com dados da curvatura e elevação, e extrair informações sobre os raios de curvatura, inclinação e posição individual dos componentes de um comboio. A partir do modelo 3D é realizado o cálculo das forças de via para posteriormente representar o movimento da composição em um ambiente de simulação 3D. Neste estudo a interação entre o veículo e a via férrea será considerada apenas na direção longitudinal. Portanto, as imperfeições verticais, laterais e de bitola não serão explicitamente quantificados. Para a metodologia, devem ser levadas em consideração somente as propriedades da via que afetam diretamente os movimentos longitudinais Abstract: Rail transport has been seeking improvements and solutions to stay competitive in the market. That is why investments are needed to increase the speed and the number of vehicles on the trains, achieving a shorter travel time with increased load. On the other hand these changes increase the likelihood of accidents, especially in sharp curves and slopes, where derailment risks happen. These are the main causes of these accidents in the railroad, it is necessary to study the geometry of the permanent way to determine the points of contact between the wheel and the rail, making it possible to determine the tangent, lateral and gravitational forces acting on the system. The knowledge of geometry is important to understand the dynamics of train composition and predict the operating conditions on the tracks. In view of the aforementioned needs, the present work has the objective of generating a 3D Track Trajectory, from a table with curvature and elevation data, and extract information about the radii of curvature, inclination and individual position of the components of a train. From the 3D model the calculation of the forces of pathway is performed to later represent the movement of the composition in a 3D simulation environment. In this study the interaction between the vehicle and the railway will be considered only in the longitudinal direction. Therefore, vertical, lateral and gauge imperfections will not be explicitly quantified. For the methodology, only the properties of the pathway that directly affect the longitudinal movements must be taken into account Mestrado Mecânica dos Sólidos e Projeto Mecânico Mestra em Engenharia Mecânica Funcamp 4946

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    Authors: Çağlar Koşun; Hüseyin Murat Çelik; Serhan Özdemir;

    Traffic flow data are stochastic in nature, and an abundance of literature exists thereof. One way to express stochastic data is the Langevin equation. Langevin equation consists of two parts. The first part is known as the deterministic drift term, the other as the stochastic diffusion term. Langevin equation does not only help derive the deterministic and random terms of the selected portion of the city of Istanbul traffic empirically, but also sheds light on the underlying dynamics of the flow. Drift diagrams have shown that slow lane tends to get congested faster when vehicle speeds attain a value of 25 km/h, and it is 20 km/h for the fast lane. Three or four distinct regimes may be discriminated again from the drift diagrams; congested, intermediate, and free-flow regimes. At places, even the intermediate regime may be divided in two, often with readiness to congestion. This has revealed the fact that for the selected portion of the highway, there are two main states of flow, namely, congestion and free-flow, with an intermediate state where the noise-driven traffic flow forces the flow into either of the distinct regimes.

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    Authors: Pinky Ann Jose;
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    Authors: Hammarsten, Anna; Ohlsson, Emma;

    The issue that this study addresses is the public transportations difficulty to adapt and keep up with the continuously digitizing society. To address this problem, the purpose of this study will be to investigate what could be a contribution to the further improvements within public transportation systems. The study is established alongside with the recently started “Welcome onboard” project, where the purpose is to develop and extend the public transportation as we know it today. The aim is to through five different functional areas urge the utility, where crowdsourcing will play a central role. We are distinguishing three public transport authorities attitudes towards the different functions of the project. We will investigate the attitudes towards the Welcome onboardprojects functions and if they could be a contribution to the RKM-companies future development. Furthermore, this thesis will also investigate how the RKM-companies would grade the different advantages of different functional areas, and in a extend what would bevital for an future implementation. The empirical data collection consist of interviews of informants with a deep understanding ofthe development of the public transportations. First we interviewed two key persons of the Welcome onboard project, to get a deep understanding of the project. Later on we interviewed key persons at Värmlandstrafiken and Västtrafik, that are two different regional public transportation authorities. To strengthen our results we also chose to interview Samtrafiken, which task are to develop collaborations and offer services within information and ticket solutions for the public transport industry. This is made in order to benefit both traffic the RKM and the travelers. All the interviews were transcribed and analyzed, later the empirical data collection could be compared through different cases. These cases were categorized by information about the company that the interviewees where representing and the answers regarding the attitudes towards the “Welcome onboard”-project and its functions. The result from the thesis will give an understanding of Västtrafik, Värmlandstrafiken and Samtrafikens perspective of the functions and attitudes towards the further development of public transportation.

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    Authors: A. P. Oliinyk; G. V. Grigorchuk; R. M. Govdyak;

    In the context of providing trouble-free operation of oil and gas pipelines and preventing possible negative impacts on the environment, the issues of constructing an integrated mathematical model for assessing the technical condition of pipelines and the impact of emergency situations on the state of the environment in the course of hydrocarbon leakage are considered. The model of the evaluation of the stress-strain state of the pipeline according to the data on the displacement of surface points for the above ground and underground sections is given by constructing the law of motion of the site by known displacements of a certain set of surface points using assumptions about the type of deformation of the sections and reproduction of the deformations and stresses tensors components on the basis of different models of deformed solid body. The specified model does not require information on the whole complex of forces and loads acting on the investigated object during operation. The flow model has been refined in a pipeline with a violation of its tightness by recording a special type of boundary conditions for a Navier-Stokes equation system in a two-dimensional formulation and developing an original method for its solution on the basis of the finite difference method. In the article the stability conditions of the proposed numerical schemes on basis of the spectral sign of stability are presented. In order to assess possible negative impacts on the environment, a model of propagation of matter at its leakage from the pipeline was developed by solving two-dimensional diffusion equations taking into account the variables and different types of boundary conditions that take into account the number of sources of pollution and their intensity. The results of computations based on computational algorithms implemented by these models and graphic material illustrating these calculations are presented, peculiarities of distribution of harmful substances in the environment near the pipeline are analyzed. Directions of further researches for successful practical realization of the offered models are established.

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    METHODS AND DEVICES OF QUALITY CONTROL
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    Authors: V. M. Kurganov;

    In this article the analysis of existing schemes of periodization of the main stages of evolution of logistics and transportation systems. Analyzes the concept of "logistics revolution", the "waves" of changes in transport infrastructure and others. Revealed and substantiated the necessity of developing a holistic concept of development of transport and logistics systems in accordance with the main stages of development of the world economy. On the basis of this study we propose an original multi-parameter classification scheme of the main stages of the development of international and regional transport systems and complexes

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    Authors: Partha Sarathi Chakraborty; Arti Tiwari; Pranshu Raj Sinha;

    Rapid development of metropolitan cities into smart cities and daily increased in number of vehicles on the roads causes increase in traffic maintenance challenges such as traffic congestion, accidents, dispatching of emergency vehicle and pollution. It will suffers people travel time, delay in response time of emergency vehicle such as ambulance, fire brigade, police etc., causes heavy loss or effects society in terms of wealth, emotions and security. The research work done in the area of Intelligent Transportation Systems and Traffic Management primarily focuses on determining effectively green light duration along with dispatching of emergency vehicle. In this research paper, the authors propose an algorithm which not only determines green light duration dynamically but also handles the emergency vehicle management efficiently. The objectives of the proposed algorithm are minimizing average waiting time. It always analysis the traffic situation at traffic intersection, along with continuous monitoring of emergency vehicle arrival at different lanes causes to optimize the waiting time of vehicle in lanes. It also deals with the deadlock and starvation condition, due to arrival of emergency vehicle in repeated interval of time in traffic intersection. The security level of emergency vehicle is in consideration during dispatching that assigned and verified by authorities to preserve security measures and society values. Here, the source of input on dynamic traffic condition is collected through Wireless Sensor Networks technology.

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    Authors: Mathilde François; Philippe Crave; François Osiurak; Alexandra Fort; +1 Authors

    Existing literature does not draw conclusions as to which speedometer type is better for truck driving. A digital speedometer would be more beneficial when obtaining absolute and relative readings, while an analogue speedometer would be more efficient and less distracting when detecting dynamic speed changes. Redundant speedometers, which simultaneously present digital and analogue speedometers, appear increasingly in vehicles, but no information is available on their ergonomic qualities. This study compared three speedometers: digital speedometers, analogue speedometers, and redundant speedometers. This study compared the efficiency, usability and visual distraction measures for all three types of speedometers in a simulated truck driving setting. The task-dependant results were confirmed for the digital and analogue speedometer. The redundant speedometer combined the benefits of each type presented separately, which highlights interesting theoretical and applied implications.

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    Authors: Ruilin Liu; Hongzhang Liu; Daehan Kwak; Yong Xiang; +3 Authors

    Navigators based on real-time traffic conditions achieve suboptimal results since, in face of congestion, they greedily shift drivers to currently light-traffic roads and cause new traffic jams. This article presents Themis, a participatory system navigating drivers in a balanced way. By analyzing time-stamped position reports and route decisions collected from the Themis mobile app, the Themis server estimates both the current traffic rhythm and the future traffic distribution. According to the estimated travel time and a popularity score computed for each route, Themis coordinates the traffic between alternative routes and proactively alleviates congestion. Themis has been implemented and its performance has been evaluated in both a synthetic experiment using real data from over 26,000 taxis and a field study. Results from both experiments demonstrate that Themis reduces traffic congestion and average travel time at various traffic densities and system penetration rates.

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    Authors: Andrii Hnatov; Shchasiana Arhun; Hanna Hnatova; Kyrylo Tarasov; +1 Authors

    Problem. The danger posed by high-speed vehicles passing through crowded areas is extremely high. An analysis of the cause of accidents involving victims in Ukraine showed that speeding was the main cause for that in the city. Therefore, one of the main means of reducing the causes of road traffic accidents involving pedestrians is artificial road irregularities, also called «speed bumps». Goal. Development of a device for generating electricity and forcing reduction of the speed of vehicles at pedestrian crossings and other sections of the road where there is a need to reduce the speed of vehicles. Methodology. The analytical methods of research on the development and application of methods and devices for transforming the energy of the sun into electricity were used. Methods of experimental researches and mathematical methods of processing and modulation of the obtained results are used. Results. The result is the analysis of the technical solutions for the devices of forced reduction of the car speed. The design of the device of forced reduction of the car speed with the function of electricity generation is developed, as well as its schematic drawings and the schematic diagram, which are shown. The principle of operation of the developed device of forced reduction of car speed is revealed. One of the variants of the pedestrian crossing with additional lighting and laser signaling system is offered, which is equipped with devices of forced reduction of car speed with the function of electricity generation. Originality. The amount of electricity that the proposed device is able to generate is modulated (depending on the traffic intensity) from 60 kW to 400 kW. Practical value. The implementation of the proposed development into road construction will lead to the implementation of energy-efficient technologies in this field and will significantly improve road safety. Pedestrian crossings equipped with additional lighting and a laser signaling system to alert road users when using these devices will receive power from a decentralized, renewable power source.

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    Avtomobilʹnyj Transport (Harʹkov)
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  • Authors: Perazzo, Mariana Costa, 1989-;

    Orientador: Paulo Roberto Gardel Kurka Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica Resumo: O transporte ferroviário vem buscando melhorias e soluções para se manter um modal de transporte competitivo no mercado. Por isso, torna-se necessário investimentos para aumentar a velocidade e o número de veículos nos trens, alcançando um menor tempo de viagem. Ocorre que estas mudanças aumentam a probabilidade de acidentes, principalmente em curvas e inclinações acentuadas, onde crescem os riscos de descarrilamento. Sendo a estrada de ferro o principal causador destes acidentes, é preciso realizar um estudo da geometria da via permanente para que se determine os pontos de contato entre a roda e o trilho, tornando possível determinar as forças tangentes, laterais e gravitacionais que agem no sistema. O conhecimento da geometria é importante para entender a dinâmica da composição do trem e prever as condições de operação nas vias. Diante das necessidades mencionadas o presente trabalho tem o objetivo de gerar uma Trajetória da Via em 3D, a partir de uma tabela com dados da curvatura e elevação, e extrair informações sobre os raios de curvatura, inclinação e posição individual dos componentes de um comboio. A partir do modelo 3D é realizado o cálculo das forças de via para posteriormente representar o movimento da composição em um ambiente de simulação 3D. Neste estudo a interação entre o veículo e a via férrea será considerada apenas na direção longitudinal. Portanto, as imperfeições verticais, laterais e de bitola não serão explicitamente quantificados. Para a metodologia, devem ser levadas em consideração somente as propriedades da via que afetam diretamente os movimentos longitudinais Abstract: Rail transport has been seeking improvements and solutions to stay competitive in the market. That is why investments are needed to increase the speed and the number of vehicles on the trains, achieving a shorter travel time with increased load. On the other hand these changes increase the likelihood of accidents, especially in sharp curves and slopes, where derailment risks happen. These are the main causes of these accidents in the railroad, it is necessary to study the geometry of the permanent way to determine the points of contact between the wheel and the rail, making it possible to determine the tangent, lateral and gravitational forces acting on the system. The knowledge of geometry is important to understand the dynamics of train composition and predict the operating conditions on the tracks. In view of the aforementioned needs, the present work has the objective of generating a 3D Track Trajectory, from a table with curvature and elevation data, and extract information about the radii of curvature, inclination and individual position of the components of a train. From the 3D model the calculation of the forces of pathway is performed to later represent the movement of the composition in a 3D simulation environment. In this study the interaction between the vehicle and the railway will be considered only in the longitudinal direction. Therefore, vertical, lateral and gauge imperfections will not be explicitly quantified. For the methodology, only the properties of the pathway that directly affect the longitudinal movements must be taken into account Mestrado Mecânica dos Sólidos e Projeto Mecânico Mestra em Engenharia Mecânica Funcamp 4946

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    Authors: Çağlar Koşun; Hüseyin Murat Çelik; Serhan Özdemir;

    Traffic flow data are stochastic in nature, and an abundance of literature exists thereof. One way to express stochastic data is the Langevin equation. Langevin equation consists of two parts. The first part is known as the deterministic drift term, the other as the stochastic diffusion term. Langevin equation does not only help derive the deterministic and random terms of the selected portion of the city of Istanbul traffic empirically, but also sheds light on the underlying dynamics of the flow. Drift diagrams have shown that slow lane tends to get congested faster when vehicle speeds attain a value of 25 km/h, and it is 20 km/h for the fast lane. Three or four distinct regimes may be discriminated again from the drift diagrams; congested, intermediate, and free-flow regimes. At places, even the intermediate regime may be divided in two, often with readiness to congestion. This has revealed the fact that for the selected portion of the highway, there are two main states of flow, namely, congestion and free-flow, with an intermediate state where the noise-driven traffic flow forces the flow into either of the distinct regimes.

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    Authors: Pinky Ann Jose;
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