【摘要】：對交通路口車流量的優(yōu)化調(diào)度,能夠有效的提升城市交通的管理質(zhì)量。對車流量的優(yōu)化調(diào)度,需要計(jì)算出高峰時(shí)段車流量的速度量化,以此定義車流量調(diào)度目標(biāo)函數(shù),完成交通路口車流量調(diào)度。傳統(tǒng)方法先最大化車流量平均等待時(shí)間,給出相鄰路口之間的協(xié)調(diào)約束性,但忽略了定義車流量調(diào)度目標(biāo)函數(shù),導(dǎo)致調(diào)度精度偏低。提出基于線性規(guī)劃的城市交通路口車流量調(diào)度模型。采用Small-World模型模擬路口車流量在路網(wǎng)動(dòng)態(tài)的演進(jìn)過程,利用線性規(guī)劃方案對城市交通路口的路網(wǎng)結(jié)構(gòu)進(jìn)行線性分割,獲取車流觀測矢量時(shí)間尺度均衡特性,得到路口信息特征尺度向量空間與空閑時(shí)間片的長度,以此為依據(jù)計(jì)算出高峰時(shí)段車流量的速度量化,定義車流量調(diào)度目標(biāo)函數(shù),利用該函數(shù)組建交通路口車流量調(diào)度模型,完成對交通路口車流量調(diào)度。實(shí)驗(yàn)仿真證明,所提模型調(diào)度精度高,為提升城市交通的管理質(zhì)量奠定了結(jié)實(shí)的基礎(chǔ)。
[Abstract]:The optimal scheduling of traffic flow can effectively improve the quality of urban traffic management. To optimize the traffic flow, it is necessary to calculate the speed quantification of the traffic flow during the peak period, and define the objective function of the traffic flow scheduling so as to complete the traffic flow scheduling at the intersection. The traditional method firstly maximizes the average waiting time of traffic flow, gives the coordination constraint between adjacent junctions, but neglects the definition of traffic flow scheduling objective function, which leads to low scheduling accuracy. A linear programming based traffic flow scheduling model for urban traffic junctions is proposed. The Small-World model is used to simulate the dynamic evolution of the traffic flow in the road network. The linear segmentation of the road network structure of the urban traffic intersection is carried out by using the linear programming scheme, and the time-scale equilibrium characteristics of the traffic flow observation vector are obtained. The characteristic vector space of intersection information and the length of idle time slice are obtained. Based on this, the speed quantification of traffic flow in peak time is calculated, the objective function of traffic flow scheduling is defined, and the traffic flow scheduling model of traffic intersection is established by using this function. Complete traffic flow scheduling at the intersection. The simulation results show that the proposed model has high scheduling accuracy and lays a solid foundation for improving the quality of urban traffic management.
【作者單位】： 清華大學(xué)土木水利學(xué)院;
【分類號】：TP391.9;U491.23

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