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首页> 外文期刊>Journal of Transportation Engineering >Measuring Horizontal Curve Vehicle Trajectories and Speed Profiles: Pneumatic Road Tube and Video Methods
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Measuring Horizontal Curve Vehicle Trajectories and Speed Profiles: Pneumatic Road Tube and Video Methods

机译：测量水平曲线车辆的轨迹和速度曲线：气路导管和视频方法

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摘要

Horizontal curves present drivers with numerous tasks that, if not performed while approaching and negotiating the curve, may result in a roadway departure crash. A vehicle's lateral position within the lane and its speed are two indicators of interest from safety and operational perspectives. These can and have been measured simultaneously at multiple locations along the curve. However, researchers face the challenge of collecting operational data while minimizing impacts on driver behavior, and developing robust, efficient, and accurate means to obtain the data. This paper presents the findings of a series of pilot studies on closed and open courses that investigated the effectiveness and accuracy of pneumatic road tubes and digital video cameras for collecting such data. Closed-course studies investigated a single data collection station setup, whereas an open-course study investigated multiple data collection stations on a horizontal curve. The data were reduced manually and automatically, and tests were performed to evaluate the statistical significance of the results. In general, the pilot studies show that pneumatic road tubes provide a higher level of accuracy than video data. Other findings include that drivers moved towards the centerline of the roadway overall and even more so when the presence of video equipment. It was also found that vehicle mean speeds at the center of the curve were lower with an increase amount of data site-based vehicle data collection equipment present.
机译：水平弯道为驾驶员提供了许多任务，如果在接近和协商弯道时未执行这些任务，可能会导致道路偏离事故。从安全和操作的角度来看，车辆在车道内的横向位置及其速度是两个令人关注的指标。这些可以而且已经在沿着曲线的多个位置同时进行了测量。但是，研究人员面临的挑战是收集运营数据，同时最大程度地减少对驾驶员行为的影响，并开发强大，高效和准确的手段来获取数据。本文介绍了一系列封闭式和开放式试点研究的结果，这些研究调查了气动路管和数字摄像机收集此类数据的有效性和准确性。封闭课程研究调查了单个数据收集站的设置，而开放课程研究调查了水平曲线上的多个数据收集站。手动和自动减少数据，并进行测试以评估结果的统计学意义。一般而言，先导研究表明，气动路管比视频数据提供更高的准确性。其他发现还包括，驾驶员总体上朝着行车道的中心线移动，甚至在视频设备出现时更是如此。还发现，随着基于数据站点的车辆数据收集设备数量的增加，弯道中心的车辆平均速度降低。

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