Traffic cones, also called safety cones, road cones, highway cones, or construction cones, are usually cone-shaped markers that are placed on roads or footpaths to temporarily redirect traffic in a safe manner.

Traffic cones mark Temporary Traffic Control (TTC) Zones, "An area of a highway where road user conditions are changed."

They are often used to create separation or merge lanes during road construction projects, automobile accidents, planned events, although heavier, more permanent markers or signs are used if the diversion is to stay in place for a long period of time.