Barricades, vertical panels, drums, cones and tubes would be considered:

They are considered to be channelizing devices. Channelizing devices accommodate smooth and continuous vehicular movement spill out of one path to another, onto a sidestep or reroute, or into a smaller voyaged way. They are likewise used to isolate vehicular movement from the work space, asphalt drop-offs, passerby or shared-utilize ways, or contradicting bearings of vehicular activity.