There are many places have needs of Traffic cones.
It's important to use the Cone which meets a certain standard for the safe constructions.
Here is a standard of cone picture below:
The all-purpose cone*
*Height requirements vary by state. 36-inches for highways in FL and DE
What Makes a Cone Legal for Road Use?
- Approved as channelizing device -- "tool used to temporarily guide traffic on public roads" -- by the Manual for Uniform Traffic Control Devices (MUTCD)
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Safe for cars because it's molded from shock-absorbing plastic unlike stiff all-purpose cones
- Meets requirements for height*, color (chromaticity coordinates) and luster (luminance factor) set by the Federal Highway Administration (FHWA)