| 摘要 |
Two markers or lines are located on a side view mirror and function to inform the driver of a leading vehicle equipped with the side view mirror when it is safe to change lanes. The space between the markers is such that if the image of a trailing vehicle in a lane to which the driver of the leading vehicle wishes to move, when viewed by only one of the eyes of driver, is wholly confined within the markers, then the driver can move safely to the lane. If however, the image of a trailing vehicle is partly outside the markers, then the trailing vehicle is too close for the driver of the leading vehicle to move safely into that lane.
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