A Study of Peripheral Visual Field Characteristics at Intersections with Unobstructed Visibility

摘要

This paper describes a basic experiment and simulation of two peripheral visual field characteristics that are related to major factors in rural district accidents, namely, collision course relationships, and presence of objects in the peripheral visual field. The quantitative recognition threshold for shape changes (stimulus) in the peripheral visual field is studied. It is found that such critical dimensions as the diameter of a circle, the side length of a square or triangle, and the axis length of an oval are important in recognizing vehicles moving on a perpendicular course. It is shown that a similar principle applies to aircraft moving in three-dimensional space, not just to vehicles moving on a two-dimensional plane. This paper identifies the limit of the peripheral visual field characteristic, one of the human visual characteristics, and also shows that there is no dependence on figure shape for other figures whose maximum side size is the same as the diameter of the circle.