Cone off
Definition 1 of 1
Pro Tip 1/3Safety Context
Used in situations where safety is a concern, often related to traffic or construction hazards. 
Due to the parade, they had to cone off the main road to ensure pedestrian safety.
Pro Tip 2/3Temporary Action
'Cone off' implies the area will be restricted for a limited time, until the hazard or event has passed. 
After the accident was cleared, workers coned off the lane temporarily to clean up.
Pro Tip 3/3Visual Signal
Cones are a visual indicator to pedestrians and drivers that they must avoid or be cautious around the sectioned-off area. 
The maintenance team coned off the slippery section of the floor until it was dry.