Abstract
Taking driver's eye fixation movement characteristics in urban tunnel as research object, 16 times effective driving test were conducted with 4 drivers by using eye tracker system to obtain the universal pattern of eye fixation distribution. According to the psychological concept of the visual lobe, the visual lobe was measured by the median successful saccade size in 2-D visual search, and the legibility model of urban tunnel signs based on the visual lobe is established. When target object is in the range of the visual lobe from the elliptic border of eye fixation distribution, the target object is easy to be cognized, otherwise it is difficult to be cognized. Then the model was used to evaluate the safety of traffic signs, and the improving measures are suggested for reference.
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