CAJ | 학술논문

车流运行速度和需求安全距离存在着动态的对应关系，需求安全距离与实际车辆间距之间的随机动态关系是车辆速度离散在空间上的物理表征．引入“格林希尔治”交通流模型，建立实际车辆间距与需求安全车距差值计算模型，并推导出不同运行速度下车辆问距与需求安全距离差值对车辆运行安全的影响程度计算模型．结果表明，运行速度对运行安全的影响范围在车辆间距小于需求安全距离的速度范围之内，车流的运行速度并非越大越不安全，而是随着速度的增加危险程度先增加后减小．最后运用试验数据对模型进行了验证分析．
차류운행속도화수구안전거리존재착동태적대응관계，수구안전거리여실제차량간거지간적수궤동태관계시차량속도리산재공간상적물리표정．인입“격림희이치”교통류모형，건립실제차량간거여수구안전차거차치계산모형，병추도출불동운행속도하차량문거여수구안전거리차치대차량운행안전적영향정도계산모형．결과표명，운행속도대운행안전적영향범위재차량간거소우수구안전거리적속도범위지내，차류적운행속도병비월대월불안전，이시수착속도적증가위험정도선증가후감소．최후운용시험수거대모형진행료험증분석．
There is dynamic relation between traffic flow speed and required safe distance. The stochastic dynamic relationship between required safe distance and the actual distance between vehicles is the physical characterization for speed difference in space. The model of difference calculation between actual vehicle spacing and required safe distance is achieved by Greenshields Traffic-Flow-Models,and the influence model of moving vehicle safety for the difference in different speed is established. The results show that vehicle speed can influence the vehicle safety only during the vehicle spacing less than the required safe distance; the vehicle moving speed is not unsafe as increasing, but increases, then decreases. Finally, the model is validated by the experimental data.