摘要
在交通系统微观车辆跟驶模型中,充分考虑驾驶员心理和行为习惯是必须的.通过对国内外大量仿真系统的跟驶模型构造分析得出,目前的跟驶模型存在若干种与实际情况不符的现象,不能准确反应实际的跟驶过程.文章从驾驶员行为调查入手,提出了危险性的概念,并给出了基于危险性判断的车辆跟驶模型,在一定程度上可以克服目前跟驶模型中的问题.模型建立中,为更加贴近实际情况,较充分地考虑了随机性因素对模型的影响.
Car-following model is one of important parts of traffic micro-simulati on.To a degree,the quality of traffi c mi-cro-simulation packages depends on the quality of car-following model.Car-following model should reflect the reality as much as possible,for improving the degree o f verisimilitude of the traffic simu lation.So when study car-following model in traffic mi-cro-simulation,it is necessary to t ake into cosideration drivers' psychology and behavior habits suff iciently.In this paper,firstly two major kinds of car-following mod els,which are adopted by lots of traffic micro-simulation packages,are discussed and their advantages and disadvantages are pointed out.The authors of the paper th ink these models don' t reflect the reality actually.In these models,the velocity or accele ration of vehicles is determined by t he velocity or acceleration of the ve hicle itself.With the reality,the drivers are unable to ju dge the speeds of itself and the vehic le in front accurately,let alone the acceleration.Through analyzing existing car-following models,they come to a conclusion that there is a large gap between e xisting models and the reality.For making car-followi ng model more real,this paper develo ps a new kind of car-following model,which brings forward a new concept ---danger index.The best advantage of t his new model is that the model takes i nto consideration human factors to a degree.Human factors an d dynamic characteristic will impro ve credibility of simulation greatl y.To some extent,the problem has been solved.And by imported randomness,the mode is closer to the reality.
出处
《宁夏工程技术》
CAS
2003年第1期27-30,共4页
Ningxia Engineering Technology
