中文摘要：

为了分析不同景观形态下的公路长度阈值的设计标准是否一致,根据交通工程心理学的理论,运用模拟驾驶的实验方法,分析驾驶人在不同公路景观类型下的驾驶行为特性,分析驾驶人心电指标、车辆运行状态随公路长度的变化规律,并建立基于驾驶人心电指标的公路长度计算模型,推算不同景观围合度的公路长度理论阈值;然后,运用压力测试问卷和实地验证实验相结合的方式,验证理论公路长度阈值模型.结果表明：模拟驾驶实验推算的理论公路长度阈值的预测精度高于90%,并得到各景观围合度的公路长度临界阈值.

英文摘要：

Based on applied theories of traffic engineering psychology,the paper aims to quantitatively analyze highway landscape＇s effect on driving behavior based on drivers＇ physiological performance,and quantify highway length thresholds under three typical landscape patterns,namely ＂open＂,＂semi-open＂and ＂vertical＂ones. These studies were designed in the combination of the driving-simulator studies with the field operational tests for verification. And devices utilized here were the driving simulator,and electrocardiograph. Specifically, vehicle-related data, ECG data and supplemental subjective stress perception were collected. The evaluation results extrapolated the drivers ＇ U-shaped physiological response to landscape patterns. Models on highway length were built based on LF / HF＇s variation trend with highway length. The results reveal that the theoretical highway length threshold tends to increase when the landscape pattern was switched to open,semi-open and vertical ones. The reliability and accuracy of the results is validated by questionnaires and field operational tests. With precision rates of theoretical thresholds higher than 90%,the model results were testified to have had high reliabilities.