Study on Coordinated Control of Traffic Signal for Adjacent Intersections

2012 ◽  
Vol 433-440 ◽  
pp. 4765-4770
Author(s):  
Yuan Li Gu ◽  
Chun Fu Shao
Keyword(s):  
Genetic Algorithm ◽  
Mathematical Method ◽  
Traffic Flow ◽  
Coordinated Control ◽  
Traffic Signal ◽  
Urban Road ◽  
Traffic Efficiency ◽  
Phase Offset ◽  
Saturated Traffic ◽  
Key Parameter

Optimization of phase offset for adjacent intersections is the key parameter regarding coordinated control of traffic signal for adjacent intersections, which decides the effect of the coordinated control for adjacent intersections. According to characters of saturated traffic flow of Chinese urban road, this thesis establishes a model for optimization of phase offset for adjacent interactions and finds a solution from such model by adopting genetic algorithm. The model is verified by actual traffic flow datum of two adjacent signal intersections on Changan Avenue. Then a comparison is made between the optimization result of such model and that of the existing mathematical method and SYNCHRO model, which indicates that the model established by this thesis can reduce the delay suffered by vehicles at the intersections and increase the traffic efficiency of the intersections.

scholarly journals Bilevel Programming for Traffic Signal Coordinated Control considering Pedestrian Crossing

2020 ◽  
Vol 2020 ◽  
pp. 1-18 ◽  
Author(s):  
Dawei Li ◽  
Yuchen Song ◽  
Qiong Chen
Keyword(s):  
Traffic Flow ◽  
Bilevel Programming ◽  
Motor Vehicle ◽  
Rapid Development ◽  
Coordinated Control ◽  
Traffic Signal ◽  
Motor Vehicles ◽  
Traffic Efficiency ◽  
Pedestrian Delays ◽  
Pedestrian Crossing

With the rapid development of the subway, more and more people choose it as the main method of transportation. However, practically, the large number of pedestrians near some large metro stations can also correspondingly affect the traffic of motor vehicles on the roads adjacent to the stations. In this study, coordinated control of the traffic signal which considers the pedestrian crossing delay is studied based on this background. Firstly, the model of progression band in adjacent intersections is analyzed comprehensively, and the calculation formulas of progression bandwidth and the delay of vehicles which are from the progression of traffic flow under different conditions are given. Secondly, five different models of pedestrian delay are analyzed. Under different conditions of motor vehicle and pedestrian traffic flow, the Vissim fitting and proofreading are carried out and the optimal models under different conditions are obtained. Finally, the bilevel programming problem which fuses the above two models is determined; by coding an algorithm, it can be resolved. Furthermore, taking eight signalized intersections from Jiming Temple to Daxinggong along Nanjing Metro Line 3 as the actual background, the calculation and optimization of coordinated control are carried out. It is found that at the expense of the traffic efficiency of large intersections to a certain extent, a wider progression band can be formulated on the roads between them, and pedestrian delays can be reduced in general.

Urban Traffic Signal Coordinated Control Optimization with Bus Priority Based on Quantum Genetic Algorithm

2012 ◽  
Vol 433-440 ◽  
pp. 829-834
Author(s):  
Huan Che ◽  
Hai Zhang ◽  
Zheng Lin ◽  
Da Ming Luo ◽  
Jia Qing Wu
Keyword(s):  
Fitness Function ◽  
Coordinated Control ◽  
Traffic Signal ◽  
Urban Traffic ◽  
Signal Control ◽  
Bus Priority ◽  
Quantum Genetic Algorithm ◽  
Traffic Efficiency ◽  
Passing Rate ◽  
No Wait

An optimization algorithm of urban traffic signal coordinated control with bus priority, which is aiming at achieving optimal comprehensive traffic efficiency, is proposed in this paper. Six kinds of key parameters that dominate signal control effects are extracted from abundant factors. Based on these parameters, an advance and flexible coding scheme which can generate detail signal control information in QGA is put forward. Considering travel time, no wait passing rate, crossing delay, green wave effect and other factors, a new fitness function is constructed. Verified by simulations in PARAMICS, the optimized signal control scheme can obviously improve comprehensive regional traffic efficiency.

DESIGN OF TRAFFIC SIGNAL CONTROL SYSTEMS BASED ON FUZZY CONTROL

2020 ◽  
Vol 4 (1) ◽  
pp. 24-27
Author(s):  
Ahmad Fadzli Abd Aziz
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Traffic Congestion ◽  
Road Traffic ◽  
Traffic Signal ◽  
Signal Control ◽  
Traffic Signal Control ◽  
Fuzzy Control System ◽  
Urban Road ◽  
Traffic Efficiency

With a gradual increase in urban road traffic volume and traffic congestion degree, how to improve and solve the current traffic pressures has been a problem requiring urgent solution. To improve the traffic congestion status in urban road intersections and heighten the road traffic efficiency, the principle of fuzzy control is employed in this paper. Moreover, the multi-phase signal traffic control of intersections is performed together with vehicle queue lengths in lanes corresponding to the key traffic flow, and a traffic signal fuzzy control system is designed. Finally, this paper compares the simulation results between the fuzzy control system designed herein and the existing fixed traffic signal control methods. The comparative test results have shown that the fuzzy control method can well better actual congestion and traffic efficiency at intersections to a greater degree than the fixed timing method does.

scholarly journals Research on Platoon Dispersion Delay of Traffic Flow considering Coordinated Control

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Yan Liu ◽  
Kuo Zhang ◽  
Li-jie Wang
Keyword(s):  
Traffic Flow ◽  
Phase Difference ◽  
Unsaturated Flow ◽  
Coordinated Control ◽  
Delay Model ◽  
Traffic Efficiency ◽  
Kinematic Behavior ◽  
Platoon Dispersion ◽  
Time Utilization ◽  
Pass Through

To improve the traffic capacity and reduce the delay of signalized intersections, the delay of coordinated control intersections is studied. Based on the freedom and randomness of the speed change and considering the delay problem caused by the discrete behavior, the authors deduced a new delay model. Firstly, by analyzing the kinematic behavior of traffic flow under coordinated control, it is found that traffic flow reaches the downstream intersection in two different forms. The two forms were as follows: the tail vehicles of discrete traffic flow were truncated and the front vehicles of discrete traffic flow were stopped. Then, the authors deduced the new delay model by analyzing the two conditions. Finally, the delay of the two cases is analyzed, which can be used as the basis for setting the phase difference between coordinated control intersections. The correctness of the model is verified by designing two example coordinated control intersections under unsaturated flow with MATLAB. Results show that the discrete traffic flows will have different impacts on delay or traffic efficiency when they arrive at the downstream intersection in different forms. Through the analysis of the delay of vehicles, when the green split is less than 0.64, the tail truncation delay is greater than the front truncation delay. When the green split is greater than or equal to 0.64, the opposite is true. The phase difference of upstream and downstream intersections can be optimized and coordinated according to the goal that vehicles can smoothly pass through the coordinated control intersection or ensure the minimum delay, so as to give full play to the space-time utilization of the coordinated control intersection.

Design and Development of Logistics and Transport Route Control System

2011 ◽  
Vol 71-78 ◽  
pp. 4261-4264
Author(s):  
Ru Wang ◽  
San Yuan Tang ◽  
Wei Xin Sun
Keyword(s):  
Control System ◽  
Traffic Flow ◽  
Future Development ◽  
Design And Development ◽  
Urban Road ◽  
Traffic Conditions

According that town plan is mainly drawn with software AutoCAD, this article realizes to automatically select a shortest transport route on urban road and dynamically display traffic flow based on VC++ and ObjectARX and lays a foundation for future development taking traffic limit, traffic conditions and other complex conditions into account.

Study on City T-Junction Design under Optimal Scenarios

2014 ◽  
Vol 587-589 ◽  
pp. 2145-2150
Author(s):  
Song Wu ◽  
Yu Chen Huo
Keyword(s):  
Traffic Flow ◽  
Traffic Signal ◽  
Road Users ◽  
Morning Peak ◽  
Minor Road

As the traffic flow is increasing gradually in recent years, a great deal of problems appears at the intersection in China. This existing T-junction has a high morning peak queues on the minor road and a poor safety record for all road users. Under this circumstance, Firstly, we will design and evaluate a traffic signal controlled T-junction by using DMRB guidelines. Furthermore, we will design and evaluate a roundabout by DMRB guidelines and ARCADY. Different components of the traffic flow in this T-junction should be considered in both two designs, such as buses, pedestrians, cyclists and cars.

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