城市道路类型对驾驶人工作负荷的影响

Influence of urban road section types on drivers' workload

为研究城市道路不同路段类型对驾驶人工作负荷的影响,招募了16名被试驾驶人,在选定的城市道路试验路线上,开展了实车试验。以心率增长率(GRHR)、心率变异性(HRV)、心率变异性时域指标(RMSSD)和心率变异性频域指标(LF)值作为驾驶人工作负荷表征指标,分析在各种路段类型下被试驾驶人工作负荷的差异。研究结果表明:城市道路不同路段类型对驾驶人的工作负荷有显著的影响;驾驶人通过交叉口时的工作负荷明显高于在非交叉口路段的工作负荷;通过平面交叉口时,左转的工作负荷高于右转和直行;通过立交桥时,在匝道上的工作负荷高于上跨及下穿立交桥时的工作负荷;车速对驾驶人的工作负荷也有较大影响,工作负荷随车辆行驶速度的提高而增加。研究结果可以为道路线形设计提供理论依据。

In order to study the influence of different road section types on drivers＇ workload,real world experiments were conducted on the selected routes in urban road environment,and 16 subjects took part in the experiments.GRHR,HRV,RMSSD,LF were chosen as the evaluation indexes of workload,and the workload discrepancy caused by different road section types were analyzed in details.The main results show that urban road section type makes a significant difference to driver＇s workload.Workload on the intersections is apparently higher than that on road sections.When going through an intersection,the workload of left turn is remarkably higher than that of right turn and straight trip.The workload of driving on a ramp is significantly higher than that of over pass and underneath pass when passing through the overpass bridges.The speed also influences drivers＇ workload,i.e.the workload will rise when the vehicle speed increases.The research results can provide theoretical basis for road alignment design.5tabs,8figs,14 refs.