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通过实车试验,探索在长下坡路段行车影响驾驶员的心理因素,建立心率增长率预测模型。并通过实测数据对模型进行有效性验证,确立安全评价标准。研究发现:山区高速公路长下坡路段的坡度、坡长及竖曲线半径对驾驶员心理生理特征有显著影响;建立以累计坡长和曲率为自变量的预测模型,该模型能有效的预测长下坡路段驾驶员的心率增长率;心率增长率低于30%,纵坡路段安全性好,30%~40%安全性较好,高于40%较差。
Through the real car test to explore driving factors in long downhill driving section of the driver’s psychological factors to establish a prediction model of heart rate growth. The validity of the model is verified by the measured data to establish the safety evaluation standard. It is found that the slope, slope length and vertical curve radius of the long downhill section of mountain highway have a significant impact on the driver’s psychological and physiological characteristics. A prediction model based on accumulated slope length and curvature is established. This model can effectively predict long downhill Segment driver’s heart rate growth rate; heart rate growth rate of less than 30%, longitudinal section of road safety, 30% -40% better security, higher than 40% of the poor.