Research On Horizontal Alignment Effects On The Driver’s Physiological Reaction On The Northest Region Highway

Highway alignment is an important part of road conditions, it directly impacts on the road landscape environment、vehicle speed、comfort、transport efficiency and traffic safety and so on. At present, our country current highway geometric design is still mainly based on the theory of the car, but the driver’s physiological property and the psychological need were not full considerated. As a result, the drivers can’t adapt to the changes in the road alignment. This paper takes the northeast forest region horizontal alignment as the research object, researching the relation between horizontal alignment and driver’s mental and physical state, and providing a theroetial guidance for the road alignment design in the future. it has a strong practical significance to reduce driver’s psychological stress and physiological fatigue and to enhance the traffic safety.Using the GPRS software tracks local highway alignment and using the Multi-channel physiological signal acquisition instrument to collect plenty of driving experiment data, applying traffic engineering psychology、road alignment design theory and the relevant mathematical methods, this study makes related research and analysis on actual driving data of forest highway. Combining human psychology and characteristics of the driver’s physiological indexes, this paper preliminary selected the heart rate of growth、SDNN index of heart rate variation and SDSD index of heart rate variation as evaluation index. By SPSS software correlation analysis and regression analysis taken to study the relation between road length、circular curve radius and evaluation indexes on drivers. The article reaches the following conclusions:(1) The heart rate of growth on drivers increases with the increases of stright line lengthen on forest region highway, showing the linear relationship,but between the other selected indexes on drivers and the road lengthen and the circular curve radius without showing the liner relationship.(2) There is a trend of the decrease after increase between the SDNN and SDSD on driver’s and stright line length on forest highway. The maximum length of the straight line reached on forest highway that ensuring driving safety is within the scope of600m to800m from the related models.(3) There is a trend of the increase after decrease between the heart rate of growth、SDNN and SDSD on driver’s and the circular curve radius on forest highway. The minimum circular curve radius on forest highway that ensuring driving safety is within the scope of500m to600m from the related models.