摘要
在经典NaSch模型的基础上,考虑行驶弯道的曲率半径、弧长以及路面的摩擦系数等对车辆运行的影响,提出一种改进的适应特殊路况的单车道元胞自动机模型.按此模型,通过计算机数值模拟,研究了具有不同曲率半径、不同弧长和不同摩擦系数的弯道对交通流的影响.模拟结果显示,改进后的模型能准确反映特殊路况对行驶车辆的影响,同时再现了与实际交通相一致的时停时走交通波等复杂的非线性现象,根据所反映出的实际交通现象,分析得出了增大弯道曲率半径和弯道处的摩擦系数,并尽量地减小弯道弧长,可以减少弯道处交通事故的发生,避免交通拥堵的发生,提高道路通行能力.
Base on the NaSch model,an improved single-lane cellular automaton traffic flow model for especial road is proposed via considering effects of curvature radii,arc length and friction factor on the vehicle movement. By numerical simulation for the traffic flow with different curvature radii,arc length and friction factor,it is found that our improved model can reflect accurately the influence of special sections of a road on the running vehicles,meanwhile visualize the complex nonlinear phenomenon traffic waves of alternate running and stopping as in actual traffics. The reflecting phenomenon in actual traffics indicates that traffic accidents and congestion can be avoided by increase the curvature radii,friction factor of road turning,the capacity of road can be enhanced also.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第8期5325-5331,共7页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10662002
10865001)
国家重点基础研究发展计划(批准号:2006CB705500)
广西研究生创新计划项目(批准号:105930903077)资助的课题~~
关键词
交通流
元胞自动机
弯道
向心运动
traffic flow
cellular automation
road turning
centripetal movement
