Traffic cones are typically used outdoors during road work or other situations requiring traffic redirection or advance warning of hazards or dangers, or the prevention of traffic. Traffic cones are also used to mark where children are playing or to block off an area. For night time use or low-light situations traffic cones are usually fitted with a retroreflective sleeve to increase visibility.
Typical traffic cones are fluorescent "safety" orange, as well as lime green. The traffic cones also commonly come with reflective striping around them, to increase visibility at night time.
They come in such sizes as: