Answer:
Barriers.
Explanation:
A barrier is an object or structure that is used to block off a road or route with the purpose of stopping or diverting traffic on that road. Barriers are also sometimes used to block access to a particular building.
Today, barriers often occur during road works, for example to keep traffic away from a street where work is in progress or to indicate a detour. Barriers such as concrete blocks, window boxes and posts are also used or considered against vehicle meddling in pedestrian areas.
