山区低等级公路同向连续弯道车辆行驶轨迹研究

发布时间：2018-01-20 09:20

本文关键词： 山区四级公路连续弯道行驶轨迹相关性分析　出处：《福建农林大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来,随着经济的快速增长和人民生活水平的不断提高,汽车已经进入寻常百姓的日常生活中,带给人们方便的同时也带来了交通事故数的迅速增长。相关研究表明,弯道路段尤其是连续弯道的事故数明显比平直路段的要大,并且恶性事故的严重程度也更加明显。连续弯道又是山区低等级公路中的常见线形,不同类型车辆驶过连续弯道的车辆行驶轨迹会存在较大差异。然而,目前我国对低等级公路连续弯道行驶轨迹的研究较少,因此本文对车辆行驶轨迹的变化规律进行研究。首先,应用实地调查法,分析在研究连续弯道的过程中如何采集所需的车辆行驶轨迹以及交通参数,可以有效避免因人为干扰因素影响车辆的行驶轨迹。其次,确定研究因素和设计实验方案。对山区四级公路不同同向连续弯道路段下的车辆运行速度、车型、行驶方向和车辆行驶轨迹点的分布情况等数据进行采集与分析。同时对车型、行驶方向和连续弯道的分段进行分类与标定。再次,采用直观分析方法,研究不同影响因素下小型车、中型车和大型车的行驶轨迹的变化规律以及越过道路中线的比例;采用相关性分析方法,研究不同影响因素下各类型车辆行驶轨迹点与道路中线之间的相关程度。研究结果表明:(1)不同类型车辆在上下行运行方向下的车辆行驶轨迹越过道路中线行驶的比例有所差异,各车型在上行方向上的越线比例明显大于下行方向;(2)不同类型车辆行驶轨迹与连续弯道道路中线之间的相关性程度较大,各车型在下行方向的行驶轨迹线与道路中线的相关性程度均大于上行方向;(3)各类型车辆在上下行运行方向上所形成的冲突区域大小不同,在上行方向为中型车时,下行方向为小型车所形成的冲突区域最大;在上行方向为小型车时,下行方向为小型车所形成的冲突区域最大;在上行方向为大型车时,下行方向为小型车所形成的冲突区域最大。最后,基于试验数据的分析和车辆通过弯道时的行驶轨迹特性,建立了车辆行驶轨迹点的拟合关系模型与连续弯道道路中线的拟合关系模型。
[Abstract]:In recent years, with the rapid growth of the economy and the continuous improvement of people's living standards, cars have entered the daily life of ordinary people. At the same time, it brings the rapid growth of traffic accidents. Related studies show that the number of accidents in curved sections, especially in continuous bends, is obviously larger than that in straight sections. And the serious degree of the malignant accident is more obvious. Continuous curve is also the common alignment in the low grade highway in the mountain area. The different types of vehicles driving through the continuous curve will have great differences. However. At present, there is little research on the continuous curve track of low grade highway in our country, so this paper studies the changing law of the vehicle track. Firstly, the field investigation method is applied. Analysis of how to collect the required vehicle trajectory and traffic parameters during the study of continuous curve can effectively avoid the impact of human interference factors on the vehicle trajectory. Secondly. To determine the research factors and design experimental scheme. For the four grade mountain highway under the different converse continuous bend section of the vehicle running speed, vehicle model. At the same time, the classification and calibration of vehicle model, driving direction and continuous curve are carried out. Thirdly, the intuitive analysis method is used. The change rule of the track of small car, medium car and large vehicle and the proportion of crossing the middle line of the road are studied under different influence factors. Correlation analysis was used. The correlation between different types of vehicle track points and the middle line of the road was studied under different influence factors. Different types of vehicles in the upward and downward direction of the movement of vehicles across the middle of the road track of the proportion of different. The ratio of the overstepping line in the uplink direction of each vehicle model is obviously larger than that in the downlink direction; (2) the degree of correlation between different types of vehicles and the center line of continuous curve road is greater, and the correlation degree between the track line of each type of vehicle in the downlink direction and the middle line of the road is higher than that of the upward direction; (3) the size of conflict area of each type of vehicle is different in the up-down direction. When the uplink direction is medium, the downlink direction is the biggest conflict area formed by small vehicle. When the uplink direction is a small car, the downward direction is the biggest conflict area formed by the small car; When the uplink direction is a large vehicle, the downward direction is the largest conflict area formed by a small car. Finally, based on the analysis of the test data and the characteristics of the vehicle running through the bend. The fitting relation model of vehicle track point and the middle line of continuous bend road is established.
【学位授予单位】：福建农林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491

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