基于驾驶员心率变化的山区旅游公路线形安全性研究

A Study on Alignment Security of Tourist Highways in Mountain Areas Based on Heart Rate Change of Drivers

为研究山区旅游公路密集复杂线形及突破规范极限值的部分线形带来的行车安全问题,选用多名驾驶员进行实车实验,采集行车过程中驾驶员的心率增长率N,路线线形指标(纵坡坡度i,圆曲线半径r)和运行速度v等数据,运用SPSS和Matlab软件分析i,r,v对心率增长率的影响规律,建立N(i),N(r),N(i,r,v)关系模型。实验结果表明,随着半径减小、纵坡增大,心率增长率整体上升,大部分心率增长率在25%~45%之间,且速度对心率增长率的影响高于半径和纵坡;建议山区旅游公路圆曲线极限最小半径≥20m,最大纵坡≤8.5%,圆曲线半径≤15m时,限速值不应超过20km/h。根据心率增长率及速度差等指标,提出敏感路段具有的特征,及敏感路段应采取的限速值和安全防护措施。

In order to study problems of traffic safety of tourist highways in mountain areas caused by complex alignments,especially which broke criteria limits,multiple drivers are selected for filed experiments.Growth rate of heart rate N,highway alignment indices(slope grade i,circle radius r),and running speed v are collected during driving.A relational model of N(i),N(r),N(i,r,v)is established u sin g SPSS and Matlab to analyze the influences of i,r,and v on the growth rate of heart rate.The result shows that as the radius decreases or the slope grade increases,the growth rate of heart rate increases as a whole,and most of which is 25%-45%.The influences of speed on heart rate growth are higher than the radius and vertical slope.It suggests that the minimum radius of the circle of tourism highways in mountain areas should be greater than 20 m,and the steepest slope less than 8.5%.The limit of speed should not over 20 km/h when the radius is less than 15 m.According to the growth rate of heart rate and speed differences,characteristics,speed limits,and safety precautions for risky road sections is proposed.