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为研究道路景观的最佳设置间距,采用试验方法,设计双车道二级路模拟真实路况环境,按照1～40km设置不同的绿化间隔,随机选择被试驾驶人进行试验,提取景观设置间隔和驾驶人心率作为外界环境的灵敏度衡量指标,量化不同道路景观设置间距下驾驶人的生理、心理反应,发现驾驶人心率和设置间距之间存在指数关系。在对绿化设置间距取对数后,进一步分析,发现驾驶人心率变化率与绿化设置间隔呈U形关系,并使用二次曲线进行拟合并求导。研究结果表明:7km是绿化景观设置的最佳变化间隔,此时驾驶人心率下降最小;该研究揭示了道路环境绿化对驾驶人生理、心理的影响程度,当绿化间距大于或小于7km的时候,驾驶人心率变化率均会增大;计算得出的景观最佳设置间距,可为改善景观环境和提升交通安全水平提供借鉴和参考。
In order to study the best setting distance of road landscape, the test method was used to design a two-lane secondary road to simulate the real traffic environment. According to the different greening intervals of 1 ~ 40km, the test drivers were randomly selected to conduct experiments to extract the landscape setting interval and driving Human heart rate as a measure of the sensitivity of the external environment to quantify the driver’s physiological and psychological response to different road landscape spacing settings and found that there is an exponential relationship between driver heart rate and set spacing. After taking the logarithm of the setting distance of greening, the further analysis shows that the rate of change of heart rate of drivers is in a U-shaped relationship with the setting interval of greening, and the quadratic curve is used for fitting and derivation. The results show that: 7km is the best change interval of green landscape setting, at this time, the driver’s heart rate decreases the least; this study reveals the physiological and psychological impact of road greening on the driver. When the greening distance is more or less than 7km, The rate of change of driver’s heart rate will increase; the calculated optimal setting spacing of the landscape can provide reference and reference for improving the landscape environment and improving the traffic safety level.