一级公路高速化前后的交通适应性分析

发布时间：2018-11-18 10:11

【摘要】：针对设计速度80km·h-1的四车道一级公路改建为同等速度四车道高速公路后的交通适应性问题,通过现场测速对比分析了高速化前后典型路段上的运行速度,并应用运行速度分析了线形的连续性和设计一致性;基于实测三轴加速度,分析了平、竖曲线高速化后行车的力学性能;应用最新版IHSDM软件预测了交通事故,并对比分析了高速化前后的交通安全状况。研究结果表明:高速化后小型车的运行速度明显提高,尤其在非几何受限路段及下坡路段,且对线形变化更加敏感,对线形设计均衡性提出更高要求;高速化后在小半径平曲线上小型车有明显的超高不足倾向,在小半径竖曲线上竖向加速度增大且有舒适性变差趋势;高速化后事故率普遍下降,降幅达高速化前的12.4%~20.32%。
[Abstract]:In view of the traffic adaptability of the four-lane first-class highway with the design speed 80km h-1 being converted into the four-lane highway with the same speed, the running speed of typical sections of highway before and after high-speed is compared and analyzed through the field velocity measurement. The continuity and design consistency of the line are analyzed by using the running speed. Based on the measured triaxial acceleration, this paper analyzes the mechanical properties of the vehicle after the horizontal and vertical curves are high-speed, and uses the latest version of IHSDM software to predict the traffic accidents, and compares and analyzes the traffic safety situation before and after the high-speed. The results show that the running speed of small cars is obviously increased after high speed, especially in non-geometric restricted sections and downhill sections, and is more sensitive to the change of line shape, so it puts forward higher requirements for the balance of linear design. After high speed, the small car has the tendency of ultra-high deficiency on the small radius curve, the vertical acceleration on the vertical curve of the small radius increases and the comfortableness becomes worse. The accident rate generally decreased after high speed, reaching 12.4% and 20.32% before high speed.
【作者单位】：哈尔滨工业大学交通科学与工程学院;鹤大高速公路宁安至复兴(黑吉界)段公路工程建设指挥部;
【基金】：黑龙江省交通运输厅项目
【分类号】：U491

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