Study On The Methods Of Speed Hump Design Based On The Driver’s Visual-Physical Characteristics

Along with the rapid development of the highway transportation in China,the road traffic accidents occur frequently while the mile age of highway 15 growing. Though analysis of the cause of traffic accidents, it is found that speeding is the main reason of the accidents and important factor of increasing the severity of the accidents. Set effective speed control facilities in the accident-prone section can decrease the vehicle speed significanty reduce traffic accidents caused by the speeding radically and guarantee the traffic flow and safety.Now there are some speed control facilities widely used in China, including speed limit signs and mandatory calming measures,some of them are less effective,some can slow the vehicle speed effectively, but they have negative impact on driving comfort and may destroy the vehicle’s stability, they are still noisy and the construction cost is high. The optical illusion deceleration markings designed by the optical illusion principle of human eyes are based on the psychological characteristics of drivers, can guide the drivers to reduce the speed initiatively and achieve good speed control effect, it has some advantages such as low cost,long life,don’t reduce the driving comfort and no noise,and it has been widely applied both at home and abroad. However,due to lack of appropriate standards or guide lines to guide, at the current stage, the optical illusion deceleration markings are designed anpavemented empirically, lead to some issues arising from the use of optical illusion markings.By studying related fields and research results, analysing the driver’s dynamic visual features and psychological characteristics and its influencing factors, the article firstly put forward a new type design concept of optical illusion speed hump,and design the main design parameters based on the factors that affect drivers speed perception and visual information, and preliminary compose 11 combination plan of different parameter sets. In order to ensure the credibility of the slowing effect evaluation, and to reduce unnecessary workload of the actual road test. Firstly select 20 subject drivers to do the simulation platform simulation experiments to feel the effects of these solutions, and then choose 3 groups of the markings which slowing effect is better for actual road experiment. In the study, the simulation experiments and road tests are combined. On this basis of detailed analysis, propose the parameters’calculation method of chevron markings, and the deceleration effect of the markings with different parameters are tested. Selected 20 subjects drivers, choose three groups of these markings which show better effect on the simulation platform. This article select six senior drivers to do the actual road test scheme of optimization of the speed humps, and use dynamic physical testing instrument to collect the heart rate during the trial application and record the speed data. Based on the theory of mathematical statistics and mathematical modeling method, to analyze the relationship between position and speed to prove the speed control effectiveness of the speed hump, and analyze the relationship between position and heart rate of growth to test the safety of the speed hump and ultimately choose the optimal parameter combination form of marking. The research achievements can provide some theoretical basis and reference for the road administration department and the facility design department.