Typically, a pedestrian is struck by a motor vehicle somewhere in the world every 8 minutes. 5,600 people are wiped out each year by vehicles and another 80,000 are seriously injured - many of them while crossing streets or intersections. Nonetheless, only a small percentage of these cases are people who spend much of their time near moving vehicles: road workers.
And this is due largely in part to the simple implementation of protective vests. Safety vests are merely light weight vests worn over normal clothing, with bright fluorescent colors just like orange or yellow, and usually with specially designed reflective strips - all developed to make the wearer as visible to the human eye as humanly possible in as many situations and environments as possible. The first component of safety vests making them visible is simply their color.
To have a high degree of visibility, it's clear to go for brighter colors like orange and yellow, but there are other reasons behind these alternatives. The backgrounds in which a wearer operates are important. On open highways for instance, the vests worn by road workers are typically a vibrant orange to contrast with the two most mainly abundant colors: the dark green of trees or landscape beside the road, or the blue sky. Orange in particular is a complimentary color of blue - that is, its precise opposite on the color spectrum, making for the greatest contrast in between the two colors, and therefore, the greatest visibility.
This article is free for republishing
Source: http://paulwise.articlealley.com/the-ultimate-performance-of-safety-vests-2084174.html