Abstract
Driving characteristics of lane departure can provide design principles for lane departure warning system and lane keeping assist system. In this article, based on driving simulator experiments of unintentional lane departure, the operation performances of human drivers, the motion characteristics of vehicles, and the relative motion between the vehicle and lane line are synthetically studied. First, unintentional lane departure is classified into lane departure by fatigue and lane departure by secondary task. Subsequently, two simulator experiments of fatigue-based lane departure and secondary task–based are designed and performed to collect the synchronous driver–vehicle–road data. The data of steering angle, steering angle velocity, steering angle entropy, lateral acceleration, lateral velocity, and yaw velocity, under fatigue-based and secondary task–based lane departure are collected and compared with those gathered under normal lane changing. Results show that the characteristics of unintentional lane departures differ from that of normal lane departure changing. Furthermore, the characteristics of fatigue-based lane departures are shown some differences with that of secondary task–based ones.
Highlights
Drivers need to focus on more information when changing lanes than when staying in a lane.[1,2] High cognitive load should be maintained when changing lanes to avoid accidents that result in casualties and property damage.[3,4] Fatigue and distraction in driving often lead to unexpected deviation from a driving lane, potentially causing a dangerous situation or an accident
When the vehicle demonstrates a tendency to depart from the current lane and a turn signal is not recognized, an abnormal lane departure is confirmed
If a lane departure event occurs with a turn signal on, the lane departure warning systems (LDWS) will not be triggered
Summary
Drivers need to focus on more information when changing lanes than when staying in a lane.[1,2] High cognitive load should be maintained when changing lanes to avoid accidents that result in casualties and property damage.[3,4] Fatigue and distraction in driving often lead to unexpected deviation from a driving lane, potentially causing a dangerous situation or an accident. To ensure driving safety during lane departure, lane departure warning systems (LDWS) have been developed. These systems detect the lane position through an on-board camera. By calculating the relative position of a vehicle and the current lane, the likelihood of a lane departure event is recognized. When the vehicle demonstrates a tendency to depart from the current lane and a turn signal is not recognized, an abnormal lane departure is confirmed. Under realistic on-road conditions, the operation rate of the drivers’ turn signals is below 50% at the initiation of lane departure.[5] The relatively low rate affects the warning accuracy rate and reliability of the LDWS. The motion characteristics of vehicles and operation characteristics of drivers during lane departure can be used to infer the operation intentions of drivers and provide design principles for
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