Research On The Effect Of Thruway Alignment On Driver's Visual Character

Human-vehicle-road(environment) constitute a dynamic system. Human who receives traffic information and adjusts the statues of vehicle in time is the backbone in this system. Thruway alignment design bases mainly on vehicle dynamics and human factor isn't considered insufficiently. By all appearances, considering human who is the backbone of the system insufficiently in thruway design is not appropriate. Although many sections of thruway are suitable for the demand of vehicle dynamics, there still have lots of traffic accidents happened, that's one of the reasons. Alignment information is important to thruway driving, 80 percent of traffic information is acquired by visual channel, so researching on how thruway alignment affects on driver's visual character is very important to the safety of driving. Based on the two points above, the study applied the knowledge of traffic psychology, Man-Machine Engineering, physiology, etc by vehicle experiment and data analysis, to research on the effect of thruway alignment on driver's visual character, and gave support to humanist thruway design.Driver's visual character is so complicated that it's necessary to solve the problem that how to describe driver's visual character. By reading lots of literatures, the study ascertained to use fixing position, fixing scope and eyeball movement speed as the measurement of driver's visual character, and then, designed experiment according to them.Thruway alignment is classified into two kinds: horizontal alignment and vertical alignment. A driver's visual character will change accordingly when he or she drives through different sections. Besides, the speed and model of a vehicle can also have influence on driver's visual character. Therefore, the study used eye movement analysis equipment to test respectively the visual data of drivers of Dongfeng van, Iveco microbus and Toyota jeep when they drove through the sections consisted of various horizontal alignments and vertical alignments, applied GPS to record vehicle speed in real time. Ultimately, by collecting thruway blueprint and matching alignment, vehicle speed recorded by GPS and the status of eye movement each other, the data in which alignment, vehicle speed and driver's character are in corresponding are acquired.By analyzing experiment data and from the point of view of driving psychology, the article studied on the relationship between horizontal alignment, vertical alignment and driver's visual character, validated the view put forward by former scholar that'the higher vehicle speed is, the less visual scope driver has, and it forms the tunnel phenomena'. Finally, this dissertation applied the theory of statistics to establish regression models of them and discussed these models farther, attempted to put forward a measurement that can describe driving psychology and associate it with visual character.