Research On Visual Deceleration Marking Setting Of V-shaped Undersea Tunnel Based On Driving Simulation

Among the many factors that lead to traffic accidents in the undersea tunnel,speeding is one of the primary causes of accidents and determines the severity of accidents.However,the special structure and environment of the undersea tunnel increase the difficulty of implementing traffic safety guarantee.The traditional setting of deceleration belt affects the ride comfort and driving stability,and even brings danger.Previous studies have shown that the application of visual deceleration marking in highway section achieves good speed control effect.Therefore,in order to reduce the number of traffic accidents caused by speeding and improve the traffic safety of the undersea tunnel,this paper makes an in-depth study on the setting of visual deceleration markings in the undersea tunnel.The main research contents and results are as follows:(1)This paper summarizes the research status of visual deceleration markings at home and abroad;analyzes the basic characteristics of the undersea tunnel from the aspects of driving environment,traffic participants and accident characteristics;analyzes the driver’s visual behavior under the driving conditions of the undersea tunnel based on the driver’s visual characteristics.Based on the principle of visual deceleration markings,referring to the best design parameters of various deceleration markings in the existing research,aiming at the different road conditions of the undersea tunnel,this paper determines the layout position,setting length and reasonable design parameter combination of vertical deceleration markings,horizontal deceleration markings and fishbone deceleration markings in each section of the undersea tunnel,and designs 11V-shaped undersea tunnels Visual deceleration marking scheme.(2)Based on the structural parameters of Jiaozhou Bay Undersea Tunnel,the simulation experiment scene of undersea tunnel including visual deceleration marking model is constructed by using UC-win/Road、Sketch Up and other modeling tools;Using blue tiger driving simulator and Facelab 5.0 eye tracker and other equipment were used for driving simulation experiment.The eye movement data of 26 drivers,such as pupil diameter,fixation point position,fixation times,and driving speed,driving time,driving distance,were collected when they passed through different visual deceleration marking schemes of V-shaped undersea tunnel.And a subjective questionnaire survey was conducted among the drivers.(3)Using Origin、SPSS and other software to process the simulation experimental data,and analyze the variation law of parameters such as driver’s pupil diameter,proportion of fixation point and vehicle speed under each visual deceleration marking scheme.The results show that compared with the setting of no deceleration marking,the visual deceleration marking can attract the driver’s attention and induce the driver to control the speed.(4)This paper constructs an index system combining quantitative and qualitative indexes,establishes a comprehensive evaluation model of the effectiveness of visual deceleration marking of V-shaped undersea tunnel based on ahp-spa method.The effectiveness evaluation model of V-shaped undersea tunnel visual deceleration marking is verified by using the standardized simulation experimental data.The effectiveness of each visual deceleration marking scheme is evaluated from the deceleration effect,visual effect and psychological effect of V-shaped undersea tunnel visual deceleration marking.Based on the research conclusion of this paper,some suggestions are put forward for the setting and application of visual deceleration marking in V-shaped undersea tunnel.The results show that the evaluation grade of V-shaped undersea tunnel fishbone deceleration markings is "I",and the deceleration effect and visual effect are better than that of transverse deceleration markings and longitudinal deceleration markings,so it is recommended to set up and apply V-shaped undersea tunnel.In this paper,software simulation,statistical analysis and mathematical model are used to study the setting of visual deceleration markings in V-shaped undersea tunnel,which provides an important basis for the application of visual deceleration markings in V-shaped undersea tunnel,enriches the domestic research on the setting of visual deceleration markings,and provides technical support for improving the driving safety of V-shaped undersea tunnel.