Based On Drivers’ Brain Cognitive Features Of Prairie Highway Intersection Traffic Signs Combination Study

As a node of the road network,a road intersection is the place where vehicles turn and pedestrians must pass.The traffic condition of the intersection is an important indicator for evaluating the entire road network.Affected by the topography and landforms,the number of prairie highway intersections is large,with close spacing,and small plane intersections account for the majority.Preliminary research found that the prairie highway has the characteristics of simple alignment,single landscape,and imperfect traffic engineering facilities.When driving in this environment,the driving speed of the driver is likely to be higher than the prescribed speed.At the same time,due to the monotonous landscape and imperfect traffic engineering facilities,it is easy for drivers to reduce their driving concentration,and their ability to deal with sudden traffic accidents is weakened,especially when driving at intersections,traffic information is missing,and the amount of signage information is not sufficient.Perfection will seriously threaten the driving safety of drivers.Therefore,when the current situation of prairie highway intersections cannot be changed,reasonable setting of traffic signs provides drivers with correct guidance information and warning information,which has great research significance in ensuring the safe driving of drivers.Based on this,this thesis divides the load level of the combination of traffic signs at prairie highway intersections,uses ERP technology,and starts from the cognitive characteristics of the driver’s brain,determines the load level of traffic signs suitable for the driver’s cognition,and then passes suitable traffic.The traffic sign combination scheme under the sign load level is stimulated,and the cognitive time of the driver and the change law of the EEG signal are summarized,and the best form of the traffic sign combination in the prairie highway intersection area is summarized.This research provides a reference for the setting and optimization of regional traffic signs at prairie highway intersections,and has reference value for improving road traffic safety and for in-depth research on road traffic human-machine environmental systems.The main research results of this thesis are as follows:(1)Through a comprehensive survey of traffic engineering facilities at typical prairie highway intersections,it is analyzed and summarized that the traffic sign setting form in the prairie highway intersection area can be divided into 5 categories according to the number of traffic signs set,and this is used as the driver’s cognitive load level The principle of division.Through the NASA-TLX quantification table,from the perspective of the driver’s subjective load,it is found that the classification of the level conforms to the cognitive characteristics of the driver,and can reflect the real situation of the impact of road information on the driver’s cognition.(2)Using event-related potentials to analyze the changes in the latency and amplitude of the cognitive P300 component and the attention distribution N200 component induced by traffic signs with different information load levels,it can be seen that traffic is set up in the prairie highway intersection area.Signs can improve the driver’s attention to a certain extent,and prevent the driver’s attention loss and perception decline caused by driving in the monotonous environment of prairie roads for a long time;combined with the driver’s level of information load on traffic signs Analysis of the recognized cognitive components and attention distribution components,C load level and D load level can not only ensure that the traffic sign information at the intersection is convenient for the driver’s cognition,but also can improve the driver’s attention.(3)Combining the driver’s visual recognition time of the traffic sign combination scheme under C load level and D load level and the change rule of EEG signal α and βwaves,the scheme 10 under C load level(warning sign+road guidance marking+Compared with other options,the setting of red and white piles)and option 7(warning signs+speed limit signs+road signs)can improve the driver’s alertness to a certain extent,relieve the driver’s driving tension,and cause the driver The changes in sympathetic tension prompt drivers to read traffic information and judge the traffic environment.The combination scheme of traffic signs under load level D can be effective in scheme 12(warning sign+speed limit sign+guide sign+road guide marking)and scheme 15(warning sign+guide sign+road guide marking+red and white pile)Improve the driver’s alertness so that the driver can accurately judge the traffic environment and information at the intersection,make the correct driving response early,and reduce the occurrence of traffic accidents in the intersection area.