低等级公路行车环境协调性评估技术研究

Research on Coordination Evaluation Technology of Driving Environment for Low-grade Highway

针对低等级公路道路条件复杂、安全监管力度较差的情况,提出了道路环境协调性的概念,认为行车环境中的多个道路条件在驾驶员的感知中应具有协调性,其指标选取的配合之间也存在一定的合理配合方式.研究从自然驾驶数据采集入手,对三处特征区域内的低等级公路进行了大量自然驾驶状态下驾驶行为和道路环境的数据采集.随后按驾驶员视觉感知将行车环境中的道路条件分成了六类,并对其进行了参数化处理.采用对数回归得到了七类道路条件下的速度预测模型.然后根据协调性的定义得出了协调性的计算方法.采用这种计算方法对丽水市遂昌县三际线进行了协调性分析与评价,并将评价结果与事故数据进行了比对.结果表明,该方法具有较高的适用性.

In view of the complex road conditions and poor safety supervision of low-grade highways, the concept of road environment coordination was put forward in this paper.It is believed that multiple road conditions in the driving environment should have coordination in the driver's perception and there is also a certain reasonable coordination mode between the coordination of index selection.Based on the collection of natural driving data,a large number of data on driving behavior and road environment of low-grade highways in three characteristic areas were collected under natural driving conditions. Then the road conditions in the driving environment were divided into six categories according to the visual perception of drivers,and were parameterized.Logarithmic regression was used to obtain the speed prediction models under seven types of road conditions,and then the coordination calculation method was obtained according to the definition of coordination.Then the calculation method was used to analyze and evaluate the coordination of San Ji Line in Suichang County of Lishui City,and the evaluation results were compared with accident data.The results show that the method has high applicability.