摘要
使用元胞自动机模型研究包含出入匝、主路和辅路的城市快速路系统的交通问题,为不同类型的路段定义了三种不同的换道规则.模拟结果表明,高入匝流量容易导致主路、匝道及其上游出现拥堵,高出匝流量容易使匝道出口车流与辅路内侧道车流发生冲突.入匝流量比较高时,主辅路为双车道的系统可以延缓交通拥堵和减少通行时间;当入匝流量较低时,双车道改善了单车道下辅路的通行状况.
In this paper, a cellular automaton model is proposed to study the traffic of urban expressway systems with on-off-ramps and accessory roads. Three lane changing rules are defined for different road sections. Simulation results show that higher on-ramp rate easily produces traffic jams on main roads, on-ramps and their upstream sections. Higher off-ramp rate easily leads to conflict with the inflow of accessory road. The system having two lanes on main and accessory roads can alleviate the jam degree and decrease the vehicles＇ running time when on-ramp rates are high.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第5期3014-3021,共8页
Acta Physica Sinica
基金
国家重点基础研究发展计划(973)项目(批准号:2006CB705503)
国家自然科学基金(批准号:70521001和70701002)资助的课题~~
关键词
交通流
元胞自动机
换道规则
匝道
traffic flow, cellular automaton, lane changing rule, ramp
