Barricades are physical barriers used to block or control access to an area. They can be made from various materials, such as wood, metal, or plastic, and are often used in situations like protests, construction sites, or during emergencies. Barricades help ensure safety by preventing unauthorized entry and directing the flow of people or vehicles. In addition to their use in public safety, barricades can also serve as a means of crowd control during events like concerts or sports games. They are often employed by law enforcement or event organizers to maintain order and protect both attendees and participants, such as police or event staff.