基于实车试验的长大下坡安全提升措施研究

Research on safety improvement measures of long downhill based on real vehicle test

以四川省雅康高速公路为例,开展了现场货车实车试验,分析了基于行为适应理论的驾驶员行为特征,对比了不同制动鼓温升模型与货车实测制动鼓温升的变化规律。高速公路长大下坡可依据驾驶行为特征划分为坡前上游路段、驶入单元、适应单元和驶出单元,结合制动鼓温升变化规律,提出了不同路段单元的交通安全设施设置标准,最后从雅康高速公路标志、标线、护栏及管理设施等方面提出了交通安全提升措施建议。

Taking Ya’an to Kangding Expressway in Sichuan Province as an example,a field truck test was carried out.The characteristics of driver behavior based on behavioral adaptation theory are analyzed.The variation rules of different brake drum temperature rise models and the measured brake drum temperature rise of trucks are compared.According to the characteristics of driving behavior,the long and steep downgrade of expressway can be divided into upstream section before slope,driving-in unit,adaptation unit and driving-out unit.Combined with the change law of brake drum temperature rise,the setting standards of traffic safety facilities in different road sections are put forward.Finally,the traffic safety improvement measures are proposed from the aspects of signs,markings,guardrails and management facilities of Ya’an to Kangding Expressway.