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Highway transportation optimization control system based on OD forecast information

INTERNATIONAL JOURNAL OF SYSTEM ASSURANCE ENGINEERING AND MANAGEMENT 2021年第4期12卷 748-756页

作者： Chen, Siru Shaanxi Coll Commun Technol Sch Econ & Management Xian 710018 Shaanxi Peoples R China

In order to effectively solve the contradiction between supply and demand of road transportation and avoid waste of road facilities and construction resources, a scientific and systematic road network plan must be formulated. OD traffic flow reflects the distribution of traffic volume from the start point to the end point in the road network for a period of time. The purpose of this paper is to design and simulate a road transport optimization control system based on OD prediction information. This paper first converts the objective function of the variable speed multi-objective optimization model, and then determines the fitness function corresponding to each objective function. Then the linear normalization method is used to normalize the fitness function, and then the judgment matrix is established, and the weights are calculated by the square root method. Transform multi-objective optimization solutions into single-objective optimization solutions. Then the binary value of the decision variable speed limit value is encoded. Finally, crossover probability, mutation probability and genetic algorithm termination evolution algebra were determined. On this basis, the solution method of the optimal speed limit value is provided. After the variable speed limit was implemented for road transportation, the average speed value during peak hours increased from 82.0 to 85.9 km/h, an increase of 3.9 km/h;during the peak period, the vehicle speed increased from 83.3 to 85.6 km/h, an increase 2.3 km/h. The experimental data shows that the variable speed limit control strategy in the road transport optimization control system based on the OD prediction information has a significant effect on improving the driving efficiency of the fast lane.

关键词： OD prediction information Road transport optimization control system traffic network simulation Minimum performance index

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Application of Distributed and Parallel Computing in traffic network simulation

Application of Distributed and Parallel Computing in Traffic...

引用

2006年国际电子、工程及科学领域的分布式计算和应用学术研讨会

作者： Zhicai Juan Institute of Transportation Studies,Shanghai Jiao Tong University Shanghai,China Linjie Gao Institute of Transportation Studies,Shanghai Jiao Tong University Shanghai,China Hongfei Jia Transportation College,Jilin University Changchun,Jilin,China

traffic network simulation describes movement behaviors and track of individual *** network is scale-up, the process takes more time and computing resources. Moreover,computing capacity of single processor computer cannot satisfy simulation requirement.A distributed and parallel computing approach to such a large-scale traffic system might be economical and *** paper designs framework of parallel traffic simulation system by using dornain decomposition method according to parallel characteristics of traffic network simulation,in other words, traffic network is partitioned to several sub-networks,and each processor of clusters is responsible for a different sub-network of the simulated region.A network-partition algorithm based on the number of vehicle is used to optimize load *** exchange mechanism between sub-networks is *** developed parallel simulation system is implemented in parallel computing platform based on Message Passing *** the results of numerical example,the proposed parallel simulation algorithm can improve speed and efficiency of traffic network *** algorithm provides a foundation for larger scale traffic network simulation and real-time applications.

关键词： traffic network simulation Distributed and Parallel Computing Domain Decomposition network-Partition Algorithm

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