中文摘要：

在NS模型的基础上,强调了车辆移动距离与车辆速度的关系,考虑了驾驶的安全性,重新定义了减速过程和位置更新规则,提出了考虑车辆减速度的元胞自动机模型.通过模拟仿真,得到的车速、流量和密度数据及其相互关系,最大流量更加接近实测数据,同时再现了亚稳态、滞后效应和相分离以及同步流等更复杂的实际交通现象;随着减速度的增大,流量最大值与其对应的临界密度逐渐增加,同步流区间逐渐缩减,速度最大变化量增大,车辆速度波动加大。

英文摘要：

On the basis of the NS model,one-dimensional cellular automaton traffic flow model is addressed,in which the relationship of vehicles deceleration is emphasized,the safety is consid-ered,and the reduction process and location update rules are redefined.By computer simulation, the relationships among speed,density and traffic flux are given to show the influence of decelera-tion on the traffic flow.The presence of metastable state,phase separation and hysteresis are re-vealed,which have been observed in real traffic.With the increase of deceleration,the critical den-sity and the maximum flux increase gradually,synchronized flow interval gradually decreases,and maximum velocity variance and velocity fluctuation increase.