Study On Safety Ensuring Technology Of Jing-Jin-Ji Trunk Highway Crossing Town Section

With the continuous development of the construction of Jing-jin-ji urban agglomeration and traffic integration,the importantance of Jing-jin-ji trunk highway is becoming more and more obvious.Accidents constantly happen in Jing-jin-ji trunk highway,which seriously affect the economic development and social harmony in Jing-jin-ji region.Research on safety ensuring technology of Jing-jin-ji trunk highway crossing town section,helps to solve the important issues in Jing-jin-ji trunk highway,and promote the development of Jing-jin-ji urban agglomeration.First of all,through statistical analysis of Jing-jin-ji trunk highway accident data,the characteristics of the accident are analyzed,from the perspective of types and spatiotemporal distribution of the accidents.From each level of driver,vehicle,road and environment,causes of accident are analyzed,it turn out that the driver is the main cause of the accident.moreover,there are more accidents in Jing-jin-ji trunk highway crossing town area.Under the circumstances of slippery road,the accident rate is high.Secondly,by collecting and analysing the vehicle operating data and the driver's physiological data of the test section,based on wavelet analysis of driver electrocardiogram signals,considering the characteristics of vehicle speed and the change of driver's heart rate during driving.The rules and definitions of the adaption road in the trunk highway that across town are proposed.With the principle of velocity coordination and the driver's physiology theory,the length of the adaptation road that met traffic safety requirements are determined.Thirdly,the driver's eye movement data of Jing-jin-ji trunk highway crossing town section is collected through the test.The visual characteristics of the driver in the section are analyzed from three perspectives: fixation,saccade and blink.The range of gaze is classified and the fixation time is analyzed.The fixation time thresholds of drivers in different mental states are determined by statistical analysis.According to the characteristics of driver's eye movement,the risk of eye movement behavior of the trunk highway crossing town section is analyzed,and several gaze behaviors should be avoided.In addition,a kind of humidity sensitve marking is designed,and the effect of the marking is analyzed through experiments.The design parameters are determined and the construction technology is put forward.Finally,through the analysis of glare situation of the median opening space,combined with the turning radius of the vehicle,the width calculation model of the opening of the median opening space is constructed.The reasonable spacing between openings in the middle zone is determined by the maximum entropy principle.The research results can not only promote the effective connection of Jing-jin-ji trunk highway,but also improve the safety of the highway.Moreover,it has a promoting effect on the research of traffic safety facilities.