Abstract: In view of the problems in setting the information volume of traffic engineering facilities in the straight section of the prairie highway, on the basis of the relevant theories of information quantification, 5 indoor simulation driving tests were established with different information levels by dividing the area of interest (AOI) for drivers. Using the method of mathematical statistics, the fixation and scanning characteristics of drivers with different proficiency in traffic engineering facilities area (AOI4) with different information levels were quantitatively analyzed. The research results indicate that skilled drivers pay more attention to traffic engineering facilities than unskilled drivers with the change of traffic engineering facilities information. At the low level of information, drivers pay less attention to the AOI4 area, pay more attention to the road ahead unconsciously, and are prone to mental fatigue when driving for a long time, which affects the driving safety. When the information level is Z4, according to the change law of driver’s fixation and scanning characteristics, it is considered that the driver’s information processing time is fast, the visual search range is large, and the driving psychological load is small, which is conducive to driving safety. At the high-information level Z5, drivers need to spend a lot of time and mental resources to pay attention to the AOI4 area information, which causes the driver to pay less attention to other areas of the road and weakens the processing ability in dealing with sudden traffic accidents.

Key words: traffic and transportation engineering, prairie highway, traffic engineering facility, area of interest (AOI), traffic safety

摘要： 针对草原公路直线段交通工程设施信息量设置存在的问题，以信息量化相关理论为基础，通过对驾驶员感兴趣区域（AOI）划分，建立5个不同信息量水平的室内模拟驾驶试验，利用数理统计方法定量分析不同熟练程度驾驶员在交通工程设施区域（AOI4），视认不同信息量水平交通工程设施的注视特性和扫视特性。研究结果表明：熟练驾驶员随交通工程设施信息量变化对交通工程设施的关注程度较非熟练驾驶员高；在低信息量水平下，驾驶员对AOI4区域的关注程度低，更多的处于无意识关注前方道路，长时间行车易出现精神疲劳影响行车安全；在信息量水平为Z4时，综合驾驶员注视特性指标与扫视特性指标的变化规律认为，此时驾驶员信息处理时间快、视觉搜索范围大、行车心理负荷较小，有利于行车安全；在高信息量Z5时，需要驾驶员花费大量的时间和脑力资源来关注AOI4区域信息，导致驾驶员对道路其他区域的关注程度下降，在应对突发交通事故时的处理能力减弱。

关键词: 交通运输工程, 草原公路, 交通工程设施, 感兴趣区域（AOI）, 行车安全