摘要
我国公路交通运输格局以双车道公路为主,尤其在地势崎岖的山地地区双车道公路所占的比重更大。山区双车道公路一直是交通事故发生的重灾区,特别是在一些坡陡、弯急、路窄、视线不良路段重大交通事故发生更频繁。
交通事故是人、车、路和环境动态系统失调的结果。传统的公路线形设计理论是基于汽车行驶动力学建立的,没有考虑人的因素。新的道路设计理论以道路使用者交通需求和生理-心理反应特征作为道路线形设计的理论基础,用动的观点设计路线的各个元素,力求协调。本论文旨在探索驾驶员脑电与公路线形之间的关系。
综合考虑脑电信号的特性和道路线形各个因素对交通运输安全的影响,设计圆曲线半径为500m、550m、600m、650m、700m和上坡坡度为3%,4%,5%,6%,7%不同线形下的10条模拟山区双车道。五位被试驾驶员以设计时速40km/h在这些模拟的山区双车道上行驶,将收集到的脑电信号(β频段绝对功率值)作为生理指标,对山区双车道公路线形(圆曲线半径、上坡坡度值)进行相关性研究。
通过采集被试驾驶员脑电β频段绝对功率变化值,分析其与圆曲线半径、坡度两个线形要素之间关系,探索β频段绝对功率值变化值与圆曲线和坡度的线形关系。以期为今后的脑电信号与道路线形研究寻找研究指标。
根据相关性和回归分析可知,驾驶员在从直线路段进入到圆曲线路段和上坡坡度时,驾驶员的β频段绝对功率值变化值与道路线形存在相关关系,具体表现为:β频段绝对功率值变化值与圆曲线半径呈负相关,与上坡坡度值呈正相关关系。
Two-lane highways are popular in China's road transport system, especially in mountai nous areas with rugged terrain. Mountainous two-lane highways has been the hardest-hit are as of traffic accidents, some sections with steep slopes, sharp turns, narrow roads, and poor v isibility problems frequently lead to grave traffic accidents.
Traffic accident is the result of disharmony of human, vehicle, road and environment. Traditional road line design theory is based on vehicle dynamics, and doesn't considered human factors. New road design theory takes traffic demands and physical-and psychological-reaction characteristics of the road users as the theoretical basis, using the concept of movement to design each element, striving to be coordination. This study aims to explore the relationship between diver's EEG and the highway line-types.
Considering the characteristics of the EEG and road alignment of transportation security, the circular curve radius of500m、550m、600m、650m、700m and the uphill slope of3%,4%,5%,6%,7%were chosen as ten different simulation two-lane of mountain areas. Five test drivers travel on these simulation roads with the speed of40km/h. The EEG (β-band absolute power value) is selected as the physiological indicators for the study of mountain two-lane highway alignment.
Through the regression analysis of the EEG β band changes in value of the absolute power and curve radius and slope, find the linear relationship of the two linear elements, hoping to make a contribution to future research on brain electrical signals and road alignment index research.
The β band absolute power value will change accordingly when the road alignment changes throuh the regression analysis. The β-band absolute power value change value is negatively correlated with circular curve radius, while it is possitive correlated with the uphill slope value.
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