Analysis Of Driver Speed Choice Behavior And Its Influence Factors In Two-lane Highway Of Mountain Area

The demands for motor vehicles continuous development of China transportation is growing, car ownership turns into rapid growth. Road traffic safety is increasingly attaches great importance to the people. By the end of 2014, the national civilian vehicle population reached 154 million, which increased about 12.4 percent compared with last year. Our country mountainous area are accounts for about two-thirds of the whole land, because of complex terrain mountainous highway, complicated traffic structure, poor road alignment, bad weather and other reasons, the accidents casualty rate stays high. According to statistics, during 2005-2013 year, the occurrence of major accidents in the western region was 121, and the proportion of the total number of serious accidents is over 45%. Now, the research about the movement speed of the plane curve V85 prediction model. Although it has obtained certain achievements, but mostly only contains radius R(or the variation of R), an independent variable, and the actual speed choice behavior is influenced by many factors(including delta, corner radius R, vehicle performance, drivers, etc.). And most of them are just about the statistical regression analysis of the bend section. Use them to predict its speed, but the actual speed as linear and the environment is constantly changing, the model prediction is the speed of a certain position, not accurate enough. In addition, the research of the current continuous curve speed’s choice behavior is considering without the effect of the adjacent linear on the speed, the flat terrain highway may be applicable, But in a mountainous area. the highway curves between line segment is shorter, usually for the two-lane highway which the continuous curve is dominant in mountain area, between adjacent corners, both the vehicle kinematics behavior and the speed choice behavior have significant influence.In order to further study of two-lane highway of mountain area speed choice behavior and its influencing factors. On the basis of the domestic and foreign scholars’ research achievements, this paper selects high accident rate of 4 mountain two-lane highway in Chongqing. Through designed experiment, collecting data that different pilots run on the road line, speed, drivers’ heart rate, video footage, lateral/longitudinal acceleration, steering Angle, speed, etc., The analysis of the factors that affect the speed choice behavior on the mountainous two-lane highway and drivers’ speed choice behavior in a single curve and the continuous curve. In this paper, the research has shown that geometry is still the main factors affecting two-lane mountain highway speed choice behavior. Mountain road street level, the condition of traffic flow and road surface conditions on the influence of the speed is bigger. map navigation instrument and driving purposes’ effect on the speed are limited. Found in the corner speed choice behavior research, whether a single bend or continuous curve.The bending deceleration and the acceleration are all decreased with the increase of bend radius, and as the bend Angle increases. But a continuous curve compared with a single corner the speed choice behavior is more complex, different radius shows different choice behavior, and different radius distribution will also cause the driver driving behavior. Moreover the results show that the continuous curve of brake speed increases with the increase of initial braking speed, but when the speed increases to a certain value, the braking deceleration decreases.This study can be used for the assumed amendments design of road driving behavior, and also can provide a basis speed limit for mountain roads, provide effective support for Administration of traffic safety.