ABSTRACT

In the past, in-vehicle head-up displays (HUDs) were used to display simple information including driving speed and the distance between cars. However, recent HUDs now display complex information such as advanced driver assistance information. This study aims to identify the effects of visual enhancements for HUDs on the driver’s performance and workload. Twenty participants conducted the tracking tasks for information search while driving in an automotive simulator environment. The participants experienced three levels of visual enhancements (none, shaded reference bar, translucent reference bar) for each task difficulty (low, medium, high). The results showed that visual enhancements and task difficulties had a significant effect on the tracking errors and subjective workloads. These findings verify that the translucent reference bar significantly improved the tracking performance. Furthermore, the visual enhancement cues on the HUDs play an important role in visual search. This research provides practical guidelines to ensure road safety through minimizing cognitive workload on drivers. Therefore, the results will encourage interface designers to consider the visual enhancement for HUDs from a user-centered perspective.

摘要

过去，车载平视显示器 (HUD) 用于显示简单的信息，包括行驶速度和汽车之间的距离。但是，最近的 HUD 现在显示复杂的信息，例如高级驾驶员辅助信息。本研究旨在确定 HUD 的视觉增强对驾驶员表现和工作负荷的影响。二十名参与者在汽车模拟器环境中驾驶时进行信息搜索的跟踪任务。参与者针对每个任务难度（低、中、高）体验了三个级别的视觉增强（无、阴影参考条、半透明参考条）。结果表明，视觉增强和任务难度对跟踪错误和主观工作量有显着影响。这些发现证实半透明参考条显着提高了跟踪性能。此外，HUD 上的视觉增强提示在视觉搜索中起着重要作用。这项研究提供了实用的指导方针，通过最大限度地减少驾驶员的认知工作量来确保道路安全。因此，结果将鼓励界面设计人员从以用户为中心的角度考虑 HUD 的视觉增强。