When you're driving along a street and see a barrier or detour, do you ever wonder how traffic cones are used? Generally, such traffic devices aren't placed at random and typically have some order in which they're used. Concerning cones in particular, these fluorescent orange devices come in sizes ranging from 12 to 36 inches. Which ones used depend on the location. 12-inch cones, for example, shouldn't be used to detour traffic on a highway, while 36-inch cones are often too large for building and street use. In all instances, various factors are taken into consideration when placing a set around a roadwork or construction area to indicate a detour.

Typically, a set is used as a warning of hazards and dangers to motorists and, thus, when lined around a worksite, provide a barrier. These need to be at least 28 inches tall to be visible to motorists, however. Anything shorter is often relegated to street and building use. Additionally, if you plan to d roadwork at night, these cones creating a barrier need to be covered with a reflective ring. As mandated by the Manual on Uniform Traffic Control Devices, any traffic cone or device used at night must have this strip added. Additionally, even though some sets of cones are weighted at the base, all need to be easily movable.Delineator posts Grip top 

Traffic cones aren't the only devices to serve as a barrier, however. In the United States, other common devices for such a purpose include barriers, barrels, and bollards. These are all designed much like traffic cones with a fluorescent or white appearance and have reflective strips. Barrels, in particular, are held in place by sandbags for additional weight. As all of these devices take up more space than cones do, they may be favorable in certain situations needing more visibility.

How do you know which traffic cones are best for the job? In most cases, cones smaller than 28 inches are needed for street and building work, while anything above and including 28 inches should be used for highways.

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