Effects of Visual Demand and In-Vehicle Task Complexity on Driving and Task211 Performance as Assessed by Visual Occlusion

摘要

Given the recent poliferation of in-vehicle systems, understanding how drivers211u001edeal with the visual demands of driving while operating these systems is 211u001eessential. To provide such, 16 subjects drove a simulator on roads with long 211u001ecurves of several different radii while providing verbal responses to questions 211u001eabout the content of electronic maps displayed on the center console. In 211u001eadditional sessions, visual demand of the same road segments was measured using 211u001ethe voluntary occlusion technique. Task completion time while driving was 211u001ecorrelated with static completion time, generally increasing when the task was 211u001eperformed while driving. It decreased, however, for short tasks, especially when 211u001eonly one glance was made. As driving workload increased, subjects made shorter 211u001eglances at the display, made more of them, but waited longer between glances. The 211u001enet effect was a slight decrease in total glance duration (eyes-off-the-road 211u001etime). As driving workload increased, driving performance became worse.