Abstract
In naturalistic driving environment, lane change is a necessary, frequent operation, and causes traffic accidents and fatalities. Current lane-change driver assistance system uses turn signals as start time; however, drivers show lane-change intention before turning on the signals. To identify lane-change intention, a driving experiment was designed and conducted, during which eye movement characteristics were recorded from 16 drivers. Time period data from 5 s before changing lanes and 5 s in lane-keeping period were analysed. Saccade speed, eye–head coordination mode, and other parameters were confirmed to be significantly different between two periods. Based on area division and Markov theory, attributes related to gaze transition were obtained, including one- and two-step gaze transition probabilities, main gaze transition paths, and regional gaze probabilities. In summary, all features extracted from eye movement characteristics, gaze transition paths, and gaze areas demonstrate that visual attention is more dispersed during the lane-change intention period. These parameters also lay the foundation for lane-change intention recognition systems and make lane change safer.
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