The Safety Improvement Research Of Urban Underpass Tunnel Based On Driver's Physiological Characteristics

With the rapid development of reform and opening up,China's rapid economic development,increasing traffic demand for highway construction put forward higher requirements,urban traffic tunnel as a mitigation of urban traffic pressure,to ease the urban traffic an effective measure,many large and medium-sized cities in China Promote construction.But the design,construction and control of urban underpass tunnel is lack of relevant theory and standards,easily lead to traffic accidents.At the same time,the location of the urban underpass tunnel is generally the urban transport hub area,the traffic environment is complex,the probability and consequences of traffic accidents is particularly serious.In view of this,analyze the traffic characteristic,improvement the design of urban underpass tunnel is imminent.In this paper,a total of 32 subjects were sampled under the conditions of free driving through different slope and internal and external illumination conditions.The physiological,eye movement and vehicle speed data of the tunnel were analyzed by SPSS.The differences of the physiological,eye movement and vehicle speed behavior of the driver under different environmental parameters were analyzed in detail,using the Origin software to fit out the relevant curve and formula.Finally,the ROC curve is established to further screen out the critical threshold of the vertical slope of the tunnel and the difference between the internal and external environment,and provide the vertical threshold and illumination setting for the existing urban tunnel optimization recommendations.Through the data analysis,it is found that the driver's heart rate and vehicle speed are significantly affected by the tunnel Slope of the urban underpass tunnel.The driver's heart rate,pupil diameter and average Continue to watch the time,speed to maintain capacity are significantly affected by the change of the illumination intensity inside and outside of the urban underpass tunnel.By analyzing the ROC curve of the different relationship,we can see that when the parameters of the vertical slope of the tunnel are set to 3.1%-3.3% in the interval,the driver's heart rate variation is the smallest and the speed to maintain capacity is the best.When the illumination of urban underpass tunnel set at 62.5-87.5lx,the driver's heart rate variation is the smallest,the speed to maintain capacity is the best,the average continuous viewing time is the shortest and the pupil diameter change is the smallest.