| Urban tunnel is a kind of road traffic building for vehicles passing through the city underground,which can relieve the urban traffic pressure to a certain extent,and at the same time it has the advantage of effectively using the underground space and not destroying the ground landscape.However,traffic problems in urban tunnels are becoming increasingly serious,especially traffic congestion and frequent traffic accidents,so,it is necessary to study the traffic safety of urban tunnel.When the vehicle runs through the urban tunnel,the illumination environment inside the tunnel,the driving speed,the up and down slope of the road leading section and the special structure of the tunnel make the driver have a certain sense of psychological tension and affect the driving safety.Therefore,through the design and implementation of the urban tunnel vehicle test method,this paper analyzes the urban tunnel under different traffic flow state driver psychological and physiological characteristics of the law changes.(1)The design and implementation of urban tunnel vehicle test.Considering the environmental factors and operation speed of urban tunnels,6 urban tunnels of huancheng south road with strong researchability were selected as test sections in xi ’an city.The environmental index data and running speed related to the urban tunnel were collected,as well as the psychophysiological index of the 7 tested drivers passing the urban tunnel,mainly including the heart rate,skin electricity and myoelectricity of the drivers(2)Suggestions on urban tunnel driving environment and driving speed safety parameters.The research focused on the research of urban tunnel under different traffic flow state with the tunnel was divided into five position points to study the relationship between the illumination of the entrance and exit,the illumination change value of the tunnel and the heart rate growth rate of the driver.The research had explored the effect of illumination and illumination on the heart rate of drivers,and the change rule of the heart rate growth rate of the drivers in 5 positions under different traffic flow states as well as the influence of tunnel length,approach slope and traffic volume on drivers was also analyzed.By means of regression analysis,the relationship models between the factors affecting the tunnel operating environment and the heart rate growth rate of drivers were established respectively,and the changing rules of the heart rate growth rate of urban tunnel drivers were quantitatively analyzed.In addition,according to the relationship between driver tension and heart rate change,the ideal domain value of heart rate growth rate of urban tunnel drivers was proposed,then the reference values of illumination and driving speed in urban tunnel were proposed.(3)The influence of environmental factors of urban tunnel on the heart rate change of drivers was analyzed,based on the study of the influence of single factor of urban tunnel environment on the heart rate growth rate of drivers.This part was mainly divided into three aspects: firstly,the partial correlation analysis of the tunnel illumination and running speed on the growth rate of the driver’s heart rate was carried out according to the five position points,and the corresponding regression model was established.After that,partial correlation analysis and regression model were established by considering the influence of tunnel approach slope and tunnel entrance illumination on the heart rate growth rate of drivers.Finally,for the overall driving environment of the tunnel,the influence of tunnel length and traffic volume on heart rate growth rate was considered comprehensively.Based on the research,the paper could provide guidance for the urban road traffic management departments and traffic participants,and provide some reference for the relevant rules and regulations in traffic control,so as to reduce the occurrence of traffic accidents in urban tunnels. |
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