Analysis Of Highway Deceleration Facilities Optical Flow Area

With the rapid development of our country in recent years the highway deceleration, the highway construction has been close to perfect. The highway into the daily life of people, convenient for people’s life. Highway safety problems also exist. The high speed highway accidents and the main cause of the high mortality. According to China’s "road traffic safety law" provisions, on highways minimum can not be less than60km/h, the maximum should not exceed120km/h. From this point can be seen, the importance of highway safety speed. While the control speed is man’s subjective behavior. The driver is often the speed control through perception, rather than on the dashboard digital. Therefore perception plays a decisive role in the process control of speed. Speed control become between the human and the safety interface, exceeded two yuan the opposition of subject and object. Widely used today on the highway to help device driver to control the speed of the vehicle are speedometer and warning signs. But standing in the object point of intervention, effect.In this study, through perception, to help drivers to slow the process is conducted in the dangerous section of the road from the main point of study. In this study, based on the basic theory of direct perception--the branch of cognitive psychology, perceptual model in high speed main driver, and various elements of. That the theory of direct perception, optical flow is the main information of human perceptual speed, and further puts forward the concept of the perceptual domain. That perception is perception domain optical flow region, and the existence of covert attention. Through the research, experiment, proved the existence of perceptual domain. Finally through the optical flow affect the driver on the speed of perception, causing the driver suddenly accelerated the illusion, so the driver mistook the speed slightly space-time, then take the initiative to slow. Finally the reduction gear design in accordance with the requirements of optical active luminous sign.