A Study on the Head Movement and Sight-Line Movement on the Expressway

Abstract

This study describes a system for analyzing drivers' sight-lines. The sight-lines were calculated from head movement and eye movement. Rotational angular velocity sensors measured the head movements in the system we used in this study. The eye movement was measured by an eye mark recorder. The relation between the head and eye movements was observed. We selected 3 conditions, which have significant effects on the sight-line in driving. These conditions were straight driving, right lane change and left lane change. All the conditions of driving were legal speeds on an expressway. The sight-line movements in straight driving were less as compared to lane changing. The ratio of sight-line angle to head movement angle were defined. The effects of these 3 factors on drivers' share of the head movement were analyzed with multiple regression analysis. This result suggests that sight-line represents a specific characteristic of a driving situation. The measurement system for sight-line can be applied to evaluate safe driving.