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Bus-Priority Intersection signal control system Based on Wireless Sensor Network and Improved Particle Swarm Optimization Algorithm

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SENSOR LETTERS 2012年第8期10卷 1823-1829页

作者： Ma, Chang Xi Li, Yin Zhen He, Rui Chun Qi, Bo Wu, Fang Sun, Li Diao, Ai Xia Lanzhou Jiaotong Univ Sch Traff & Transportat Lanzhou 730070 Peoples R China

In order to make buses have the priority to bus and ease the intersection congestion, this paper designs bus-priority intersection signal control system based on wireless sensor network and improved layered parallel particle swarm optimization (ILPPSO) algorithm. Dynamic network mode of wireless sensor network is used to collect the information of bus flow by adding nodes to it. The channelization method of intersections is improved by setting up bus lane. We build signal timing optimization model based on the traffic data collected by wireless sensor network and use improved particle swarm optimization algorithm to solve it. Finally, based on VISSIM soft, the signal control system is tested by programming. The results show that the signal control system can ease bus flow of intersections quickly and reduce vehicle's delay efficiently.

关键词： Bus-Priority Intersection signal control system Wireless Sensor Network Particle Swarm Optimization Algorithm

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A Development of Deterministic signal control system in Urban Road Networks

A Development of Deterministic Signal Control System in Urba...

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Annual Conference of the SICE

作者： Shimizu, Hikaru Kobayashi, Masa-aki Fujii, Haruko Katagiri, Shigekazu Fukuyama Univ Dept Informat Engn Fukuyama Hiroshima Japan Fukuyama Univ Dept Mech Syst Engn Fukuyama Hiroshima Japan Yuge Natl Coll Maritime Technol Dept Informat Sci & Technol Yuge Ehime Japan

ISBN: (纸本)9784907764302

This paper studies a development of deterministic signal control system in urban road networks from the viewpoint of a digital control. The signal control system of the congestion length is described by a nonlinear time-varying discrete dynamic system and synthesized by using the feedback control based on the volume balance at each signalized intersection. The balance control algorithm and network control algorithm in which the three signal control parameters consisting of the cycle length, green split and offset are searched systematically so as to minimize the sum of congestion lengths at signalized intersections are presented. The configuration and development procedure of the deterministic signal control system are presented based on our studies. From the comparison of congestion lengths and signal control parameters between measurement values and simulation values, it is confirmed that the signal control systems and the signal control algorithms work effectively to minimize the congestion lengths at signalized intersections.

关键词： signal control system balance control algorithm parameter optimization system development

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Prototype for an Optimized Drive signal control system for a 2.5 GHz Doherty Power Amplifier

Prototype for an Optimized Drive Signal Control System for a...

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IEEE Texas Symposium on Wireless and Microwave Circuits and systems (WMCS)

作者： Sah, Pallav Kakaraparty, Karthik Poulton, Matthew Luyen, Hung Mahbub, Ifana Univ North Texas Dept Elect Engn Denton TX 76203 USA Qorvo Richardson TX USA

ISBN: (数字)9781665486095

ISBN: (纸本)9781665486095

This paper presents an optimized drive signal control system for a 2.5 GHz Doherty power amplifier (PA). The proposed system enables independent control of the amplitudes and phases of the drive signals fed to the inputs of two parallel PAs that can be used in a Doherty PA architecture. This is achieved by incorporating a variable amplitude shifter (VAS) and a variable phase shifter (VPS) in each of the two parallel paths, which allows for driving uneven power levels with an arbitrary phase difference to the individual PAs. The specific VAS (Qorvo QPC6614) and VPS (Qorvo QPC2108) components that we used for the test system provide an amplitude attenuation range from 22 dB to 31.5 dB with a step size of 0.5 dB and a phase range from 0 degrees to 360 degrees at the intended operating frequency of 2.5 GHz, offering the benefit of characterizing the behavior of PAs under test for a large range of drive signals to optimize the output performance such as power added efficiency or adjacent channel leakage ratio. For demonstration, the proposed drive signal control system is integrated with two parallel GaN transistor-based PAs (Qorvo QPD0005) with a P-1dB of 37.7 dBm, whose output signals are combined and then measured to provide system characterization. Each PA is preceded by a drive amplifier with a gain of 17.8 dB to boost the power fed into the PA. The proposed circuit also incorporates a 20 dB directional coupler and a 3 dB Wilkinson power splitter, which were designed, fabricated on an FR4 substrate, and experimentally verified. While Qorvo QPD0005 was used as a specific test-case in this demonstration, the proposed system can be used to characterize the behavior of a wide range of Doherty PAs.

关键词： Doherty power amplifier drive amplifier variable amplitude shifter variable phase shifter Wilkinson power splitter signal control system directional coupler

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Development of a signal control system along the Route 2 in Hiroshima City

Development of a Signal Control System along the Route 2 in ...

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Annual Conference of the SICE

作者： Fujii, Haruko Shimizu, Hikaru Department of Information Science and Technology Yuge National College of Maritime Technology Japan Department of Information Engineering Fukuyama University Fukuyama Japan

ISBN: (纸本)9784907764302

This paper deals with the study of a signal control system along the Route 2 in Hiroshima city from the viewpoint of a digital control for traffic flow dynamics. Time-varying characteristics of traffic flows are analyzed to evaluate the volume balance at each signalized intersection during the cycle length for each lane. The signal control system of the congestion length is described by a nonlinear time-varying discrete dynamic system and synthesized by using the feedback control based on the volume balance at each signalized intersection. The signal control algorithm in which the three signal control parameters are searched systematically so as to minimize the sum of congestion lengths along the arterials is presented. From the comparison of congestion lengths between measurement values controlled by a pattern selection method and simulation values, it is confirmed that the signal control system and the signal control algorithm work effectively along the Route 2 in Hiroshima city, Japan.

关键词： traffic analysis signal control system signal control algorithm simulation

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Implementation of Proactive Traffic signal control system at Multiple Intersections at the Greater Houston Area: Final Report. Wu, X;Yang, H;Adhikari, B;Mainali, B;Pokharel, P.

Implementation of Proactive Traffic Signal Control System at...

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作者： Wu, X. Yang, H. Adhikari, B. Mainali, B. Pokharel, P. Lamar Univ. Beaumont TX. Coll. of Engineering. Federal Highway Administration Austin TX. Texas Div. Texas Dept. of Transportation Austin. Research and Technology Implementation Office.

This report summarizes the findings from implementing the proactive signal control system at 30 intersections at four testbeds in the Houston metropolitan area. The work started in April 2017 and the final installation was on December 17, 2018. The final data set was received on January 24, 2019. The data were used evaluate the performance of the implemented proactive signal control system. This project is an extension of Project 0-6920, which proposed a new signal control logic aiming to help vehicles in a platoon more smoothly pass through an intersection at or close to the design speed. Vehicles in a platoon have smaller headways, so the capacity of an intersection could be increased if vehicles in a platoon could pass through the intersection without being interrupted. This logic relies on the existing detecting and control technologies used by TxDOT on Texas roads. Therefore, it is not necessary to test and install new hardware systems, which could be costly and time-consuming, and also may be subject to many uncertainties. Our findings indicate that the proposed proactive signal control worked well when the traffic flow rates were more than 500 veh/hr/ln and the occupancy rates exceeded 0.4. If the flow became less than 350 veh/hr/lm and/or the occupancy rates dropped below 0.20, the new system had insignificant impact on the traffic patterns. When the flow and/or occupancy is low, vehicle movement is more independent, and the arrival pattern tends to be more random. Therefore, the proposed proactive signal control system is not so effective in impacting the traffic patterns at an intersection.

关键词： signal control logic signal control system Texas Department of Transportation (TxDOT) Transportation planniing Uncertainties

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Development of a signal control system along the Route 2 in Hiroshima city

Development of a signal control system along the Route 2 in ...

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SICE Annual Conference

作者： Haruko Fujii Hikaru Shimizu Department of Information Science andTechnology Yuge National College of Maritime Technology Japan Department of Information Engineering Fukuyama University Fukuyama Japan

ISBN: (纸本)9784907764302

This paper deals with the study of a signal control system along the route 2 in Hiroshima city from the viewpoint of a digital control for traffic flow dynamics. Time-varying characteristics of traffic flows are analyzed to evaluate the volume balance at each signalized intersection during the cycle length for each lane. The signal control system of the congestion length is described by a nonlinear time-varying discrete dynamic system and synthesized by using the feedback control based on the volume balance at each signalized intersection. The signal control algorithm in which the three signal control parameters are searched systematically so as to minimize the sum of congestion lengths along the arterials is presented. From the comparison of congestion lengths between measurement values controlled by a pattern selection method and simulation values, it is confirmed that the signal control system and the signal control algorithm work effectively along the route 2 in Hiroshima city, Japan.

关键词： Traffic analysis signal control system signal control algorithm Simulation control systems signal control Traffic Analysis signalized intersections simulating Traffic flow city

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A development of deterministic signal control system in urban road networks

A development of deterministic signal control system in urba...

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SICE Annual Conference

作者： Hikaru Shimizu Masa-aki Kobayashi Haruko Fujii Shigekazu Katagiri Department of Information Engineering Fukuyama University Fukuyama Japan Department of Mechanical System Engineering Fukuyama University Fukuyama Japan Department of Information Science and Technology Yuge National College of Maritime Technology Ehime Japan

ISBN: (纸本)9784907764302

关键词： signal control system Balance control algorithm Parameter optimization system development control systems urban road networks systems development Parameter optimization signalized intersections signal control deterministic signal road network control parameter feedback control

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A Novel Railway signal control system Based on the Internet Technology and an Assurance Technology

A Novel Railway Signal Control System Based on the Internet ...

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International Conference on Distributed Computing systems Workshop

作者： Takashi Kunifuji Tadao Miura Gen Kogure Hiroyuki Sugahara Masayuki Matsumoto Research and Development Center of JR East Group East Japan Railway Company Limited Japan Train Control Systems Signalling and Telecommunications Technology Division Railway Technical Research Institute Japan Electrical & Signal Network System Department East Japan Railway Company Limited Saitama Saitama Japan

ISBN: (纸本)9781424431755

We have developed a novel railway signal control system that works as a distributed system. It consists of a central control unit (called LC) and terminal devices (called FC) that are distributed at the railroad wayside and operate signal devices. The Internet technologies and optical LAN technologies have been used as communication methods between the LC and the FCs. The FC is a distributed terminal device that has its own processor and placed at the railroad wayside to control the field signal devices. The LC is a centralized computer device that has software arranged by the function of the field devices. An optical network system and multiple communication paths between the LC and the FCs realize robust transmissions. Moreover, the assure performance of controls and transmissions have been investigated, and the autonomous distributed signal control system is also discussed as the next steps of the system.

关键词： signal control system Logical controller E-PON Field controller Optical LAN

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Optimising the public transport priority at road intersections

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IET INTELLIGENT TRANSPORT systemS 2018年第8期12卷 986-994页

作者： De Keyser, Olivier Hillewaere, Menno Audenaert, Pieter Maenhout, Broos Univ Ghent Fac Econ & Business Adm Tweekerkenstr 2 Ghent Belgium Univ Ghent IMEC Dept Informat Technol Fac Engn & ArchitectureIDLab Ghent Belgium

A lot of effort is put into improving the efficiency of transportation and the optimisation of the current traffic situations. Nevertheless, this will not be sufficient to deal with the increasing number of road users. Public transportation is an appealing economical solution, although its quality is dependent on the efficiency of traffic lights and congestions. The aim of this study is to investigate the impact of public transport (PT) priority on the performance of a single road intersection with two two-way crossing streets and a dedicated tram line. In this perspective, the authors set up a microscopic simulation experiment to evaluate different PT priorities. The study is applied to a road intersection in Ghent (Belgium) and all relevant inputs are based on real-life data. Overall, the total travel time of all actors advocate for traffic light control regulations that accommodate regular road users at the expense of PT and contradict the current priority settings of the signal control system. However, the passenger-dependent travel times give a slightly nuanced view advocating a delayed priority or even no priority for PT vehicles only during the evening peak.

关键词： public transport optimisation road traffic control public transport priority optimization traffic situations public transportation economical solution traffic light efficiency traffic congestions PT priority single road intersection two-way crossing streets microscopic simulation experiment Ghent Belgium traffic light control regulations signal control system passenger-dependent travel times delayed priority

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New transit signal priority scheme for intersections with nearby bus rapid transit median stations

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IET INTELLIGENT TRANSPORT systemS 2020年第12期14卷 1606-1614页

作者： Lin, Yongjie Yang, Xianfeng Terry Wang, Qinzheng South China Univ Technol Sch Civil Engn & Transportat Guangzhou 510641 Guangdong Peoples R China Univ Utah Dept Civil & Environm Engn Salt Lake City UT 84112 USA

To improve the accessibility of bus rapid transit (BRT) systems, the median stations are usually located beside intersections. However, due to the limited storage space at the stations, high bus volumes and fluctuant bus arrival patterns may cause queue spillbacks and consequently block the intersections. Traditional transit signal priority control could deteriorate such situations when a green extension or a red truncation is activated. Hence, it is essential to develop a new operational framework that is capable of both reducing bus travel time and preventing queue spillbacks at the median stations. This study presents a novel signal control scheme to integrate both priority (i.e. green extension and red truncation) and suppression strategies (i.e. green truncation and red extension) for approaching buses. Notably, the suppression control is only implemented to the farside directional traffic. To evaluate the proposed signal control system, this study tests the algorithms on a real BRT network in Jinan, China. Simulation results of multiple experiments show that the developed method has great promise in bus delay reduction and spillback avoidance in the station area. Other further explorations with sensitivity analysis find that the proposed control will be more effective when the signal is able to provide longer priority and suppression durations.

关键词： delays road vehicles road traffic control rapid transit systems public transport collision avoidance sensitivity analysis nearby bus rapid transit median stations bus rapid transit systems transit signal priority control green extension green truncation red extension suppression control signal control system bus delay reduction queue spillback prevention bus travel time reduction BRT network Jinan China sensitivity analysis

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