基于CTM快速路可变限速标志投资优化  

Investment optimization of dynamic variable speed limit boards in freeway based on CTM

作　　者：何胜学[1] 张皓东[1] He Shengxue Zhang Haodong(Business School, University of Shanghai for Science ＆ Technology, Shanghai 200093, Chin)

机构地区：[1]上海理工大学管理学院,上海200093

出　　处：《计算机应用研究》2016年第12期3717-3720,3724,共5页Application Research of Computers

基　　金：国家自然科学基金资助项目(70672110);上海市(第三期)重点学科项目(S30504);上海市教委科技创新项目(10YS105)

摘　　要：针对快速路可变限速标志投资缺乏系统的定量分析、位置模糊问题,基于改进元胞传输模型构建了阶梯形限速投资模型。首先,对限速控制的改进元胞传输进行了描述;然后,为实施阶梯形限速控制,引入了0-1整数规划算法和限速约束条件;最后,利用遗传算法优化了投资额一定时可变限速标志位置以及动态限速值。算例结果发现,随着投资额增大,平均临界密度标准差、饱和度会减小,车辆运行速度会提高,但同时效益生产量会随之降低,系统平均延误会随之增大。结果分析表明,该模型能够有效解决可变限速标志投资优化问题。For the investment of the variable-speed-limit boards was lack of the quantitative analysis and their locations were uncertain, this paper built an investment model, which implemented stair-like control strategies of variable-speed-limit based on the improved cell transmission model. First of all, it described the improved cell transmission model based on speed limit control strategies. Secondly, to implement stair-like control strategies, it introduced 0-1 integer programming algorithm and the related speed limit constraints. Finally, it optimized the locations of variable-speed-limit boards and dynamic speed limit values by ge- netic algorithm when the investment was constant. Simulation example results show that the average standard deviation of the critical density and saturation will decrease and the vehicle speed will increase as the investment increased, but the throughput will decrease and the average system delay will increase as well. The results show that the proposed model can effectively solve the problem of investment optimization of the variable-speed-limit boards.

关 键 词：可变限速标志 投资优化 元胞传输模型 阶梯形限速控制 快速路 

分 类 号：U412.3[交通运输工程—道路与铁道工程]