Based On Reasonable Shoulder Width Of Mountain Highway Traffic Safety Research

If the shoulder' s width of the freeway in mountains is too wide, the engineering work load of the roadside slope and 0. the difficulty of revetment' s maintenance and the engineering cost will be increased. Along with our country' s freeway extending to the mountains, It' s one of the important measures to decrease the constructing difficulty and engineering cost that we curtail the designing width of the shoulder. But if the shoulder' s width is too narrow, it will increase the driver' s physiological tensity and psychological load when he or she driving the vehicle, under this condition, long time driving will bring driver greater work load and fatigue extent, then lead to operating errors, Finally, the road traffic accident will be occurred. Considering the driving safety, this paper researched the appropriate width value of the freeway' s shoulder in mountains systemically.Firstly, By using iatrology and psychology-physiology theory and experiment equipment, this paper had done large numbers of practical road-vehicle experiment research, and analysed the experiment recorded data from the qualitative and quantitative point, and discussed the necessity of "relative value" processing on the tested data, then obtained three indices by calculating the "relative value" of experiment measure indices. The three indices are heart rate calculating index, moving speed calculating index of eyeball and area calculating index of gazing point.By using the theory and method of mathematical statistics and mathematical modeling, this paper established and validated a linearity regression model which is corresponded to different vehicle' s style. In the model, the independent variables are vehicle' s speed and width of freeway' s shoulder, the dependent variables are above indices. Then balanced the difference of the above three indices' regression model from different vehicle style' s point.Further more, by using the theory of probability and fuzzy mathematics and mathematical modeling, this paper established the function which can be used to evaluate the degree that above indices subject to the "no tension" fuzzyaggregate, "some extent tension" fuzzy aggregate and "great tension" fuzzy aggregate. Based on these, this paper researched driver' s tensity evaluating function.By combining the regression modeling and the driver' s tensity evaluating function, this paper studied the driver' s tensity evaluating model which is corresponded to different vehicle' s style and driver' s different working condition. In addition, because of the evaluating function' s continuity, in order to clarify the meaning of different tensity degree value, this paper divided the driver' s tensity evaluating function.By studying the relationship among driver' s tensity, fatigue, dependability and traffic safety, this paper studied drive' s safe driving tensity which is based on driver' s fatigue and dependability. At last, this paper obtained the safe and appropriate width index value of the freeway' s shoulder in mountains.Finally, this paper used the VC++ program designing language, made the calculating program of the appropriate width index of freeway' s shoulder.