基于视觉的高速公路施工区车路协同系统的驾驶分心

Driving distraction of cooperative vehicle infrastructure systemin freeway work zone based on driver’s visual characteristics

为明确车路协同系统(CVIS)对驾驶分心的影响,提升车路协同系统在高速公路施工区场景下的安全应用水平,该文基于驾驶模拟技术搭建车路协同仿真测试平台并开展实验,从注视分配和分心程度两个层面构建指标体系,采用配对T检验和非参数检验比较有无车路协同系统条件下各指标的差异。车路协同车载终端人机交互界面(HMI)使用后,驾驶人前方道路注视时间比例与注视次数比显著降低,分心指数及单位分心指数显著升高。结果表明:车路协同HMI会占用驾驶人视觉资源并具有分心隐患。因而,车路协同安全评估及HMI设计优化是必要的。

A Cooperative Vehicle Infrastructure System(CVIS)simulation test platform was built based on driving simulation technology and conducted experiments to clarify the visual distraction effect of the CVIS,and to improve the safety application level of CVIS in the scene of freeway work zone.An index system was constructed from two levels of fixation allocation and distraction degree.Paired sample T-test and nonparametric test were used to compare the differences between with and without CVIS of each index.After using the vehicle terminal Human-Machine Interface(HMI),the ratios of time and frequency of fixation on the road ahead significantly dropped,while the distraction index and unit distraction index significantly increased.The results show that the HMI of CVIS occupies the driver's visual resources and is prone to cause distraction.Therefore,carrying out the CVIS safety assessment and HMI design optimization is necessary.