Effect of Different Information Push Mechanism on Driver's Situation Awareness

The situational awareness in the field of road traffic refers to the perception, understanding and prediction of many elements in the traffic environment. Driver's situational awareness is an important factor affecting driving safety. Therefore, improving the level of situational awareness can help drivers to reduce their workload and operation errors so as to effectively protect drivers' personal safety. In this study, the subjects completed the operation by driving a vehicle in a virtual operation scenario. Through experiments, this study investigates the influence of different task complexity and different information push on the situational awareness of drivers. In the experiment, the subjects completed the task of work with information prompt and no information prompt under the two kinds of scenes (one is single, multi straight path and short distance of road condition, another is complex road condition, multiple bend, long distance). The methods of information prompting include path map prompts and voice prompts through visual display. All the subjects need to complete the following tasks. First of all in a single unfamiliar environment, the subjects observed the field work independently and completed the task, without the information hints of the task. Second subjects complete the field task with the aid of the task path planning map. Third subjects complete the task under the real-time path voice prompt. In the experiment, The subjective evaluation scoring method and Detection Response Task (DRT) are used to measure the level of situational awareness and the time and quality of the task are used to measure performance of drivers. The results show that under the same conditions, the level of awareness of the driver under the prompt of the voice is higher than that of the driver under the forerunner of the mission path planning, and the level of situational awareness under the simple operation environment is higher than that of the complex operation environment. By analyzing the performance of work, we find that with the improvement of the level of situational awareness, the time of the task is shorter and the performance of the work becomes better. This research is of great significance to training and improving the level of awareness of drivers.