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为使高速公路线形风险评估最终有一个量化的综合评估结果,并克服现有线形风险评估方法的缺陷,在线形风险评估指标研究的基础上,将运行速度协调性线形评估和驾驶员心理指标线形评估相结合。评估过程中综合考虑驾驶员因素及线形本身的影响,规避两方法各自的局限性,提出了一种量化的高速公路线形风险评估综合指标——线形风险指数,实现了高速公路线形风险评估的多元考虑。以湖南某高速公路为依托,通过现场试验对3名驾驶员心率变异指标及实时车速进行采集,采用线形风险指数对试验段线形分段进行了风险评估。通过将2009年至2012年试验段交通事故情况与评估结果进行对比分析,发现试验段线形风险指数与路段事故数变化规律基本一致,验证了线形风险指数进行高速公路线形风险评估的可行性与可靠性。
In order to make the highway linear risk assessment finally have a quantitative comprehensive assessment result and overcome the defects of the existing linear risk assessment method, based on the research of the linear risk assessment index, the linear assessment of the coordination of the operation speed and the driver psychological indicator are linear Assessment combined. In the process of assessment, considering the influence of drivers and linearity itself and circumventing the respective limitations of the two methods, a quantitative linear indicator of linear risk assessment - linear risk index is proposed to realize the multiple linear consider. Based on a highway in Hunan Province, three drivers’ heart rate variability indices and real-time vehicle speed were collected through on-the-spot test. The linear risk index was used to assess the linear segment of the test section. By comparing and analyzing the traffic accidents in the test section from 2009 to 2012 with the assessment results, it is found that the linear risk index in the test section is basically consistent with that of the road section accidents, verifying the feasibility and reliability of the linear risk index in the linear risk assessment of the expressway Sex.