| 摘要 |
A visually perceptible target area is provided on the reflective surface of a side view mirror of a vehicle which the eye can compare and easily correlate to the image of a trailing vehicle reflected in the mirror. The target area can be provided by a view frame, which can be adhered to, suspended in front of, or etched into the mirror's reflective surface. Alternatively, the target area can be a visually perceptible, reflective area on the mirror's reflective surface, such as a colored or tinted area. The target area is sized and shaped such that the reflected image of a vehicle of normal size will very approximately correspond in size and shape to the size and shape of the target area when the trailing vehicle is at a defined trailing distance behind the vehicle to which the mirror is attached. The target area is reflective, and is preferably bounded by substantially rectilinear sides to preferably provide for a box-shaped target area.
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