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Influence of haptic guidance on driving behaviour under degraded visual feedback conditions

Influence of haptic guidance on driving behaviour under degraded visual feedback conditions

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Drivers always suffer varying degrees of performance decrements under insufficient visual feedback (VF) conditions. Nowadays, haptic guidance (HG) is a developing assistance technology to enhance steering performance; however, driver reactions to HG under degraded VF conditions are still unclear. Therefore, this study focuses on the influence of HG on driving behaviour when part of the road ahead is occluded. The experimental conditions combined three levels of HG, namely none, weak, and strong torques, with four scenarios of VF: whole, near, mid, and far segments. The driving experiment was conducted using a high-fidelity driving simulator with 12 participants. By analysing the standard deviation of lane position and time-to-lane crossing, it was shown that the lane keeping performance became worse without the HG for the degraded VF of near and far segments compared to that of whole and mid-segments. Furthermore, it indicates that the performance decrement in the worse cases was compensated by the implementation of HG, and the strong torque was significantly more effective than the weak torque. Additionally, the use of HG always resulted in an improved turning manoeuvre while approaching curves in the degraded VF of near and far segments.

http://iet.metastore.ingenta.com/content/journals/10.1049/iet-its.2017.0112
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