摘要
为了得到山地城市信号交叉口通行能力影响因素中进口道坡度的修正系数,明确其对饱和流量的影响,在实际交通环境中难以获得理想条件的情况下,基于VISSIM设置了仿真环境。根据山地城市交通流特点对仿真参数进行了校正,在此基础上设计了不同进口道坡度下饱和流量仿真实验,根据仿真实验数据分别建立了坡度为正、负情况下影响饱和流量的进口道坡度修正系数模型。实验结果表明,上坡时2%的坡度对饱和流量开始产生较明显的影响,10%以上的坡度影响开始减弱;下坡时-3%的坡度对饱和流量开始产生较明显的影响,-7%以下的坡度影响开始减弱。最后利用实测数据对比HCM法,验证了模型在我国的适用性。
In order to analyze the effect of approach grade on saturation flow at signalized intersectionand get the adjustment factor for approach grade, traffic situation was simulated by VISSIM because theideal situation was unobtainable in real situation. The simulation parameters were calibrated based on ac-tual traffic flows at the mountain cities. The simulation tests about the effect of different approach gradeson the saturation flow were designed and the adjustment factor models for approach upgrade and down-grade were provided. The results show that an upgrade 2% begins to effect the saturation flow obviouslyand the effects start to weaken above 10% upgrade. A downgrade-3% begins to effect the saturationflow obviously and the effects start to weaken below-7% downgrade. Finally, a comparison of the recom-mended methods to HCM methods based on measured data validates the applicabilities of that the rec-ommended methods in China.
出处
《交通运输研究》
2015年第5期25-30,共6页
Transport Research
基金
四川省教育厅科研项目(13ZB0128)
关键词
信号交叉口
饱和流量
仿真分析
进口道坡度
山地城市
signalized intersection
saturation flow
simulation analysis
approach grade
mountainous city
作者简介
高建杰（1985-），男，山东栖霞人，讲师，硕士，研究方向为交通规划与交通组织。E—mail：jianjiecq@163．com。
