To prevent barricades from being blown over, which of the following may be used to hold them in place?

Using sand bags to hold barricades in place is effective because they are generally heavy enough to resist wind forces and help stabilize the structure. Sand bags can easily be placed at the base of a barricade, providing additional weight that ensures the barricades remain upright and secure, especially in windy conditions or in environments where they may be subject to movement from passing vehicles.

In addition, sand bags are portable, allowing for easy transport and setup at various work zones. They can conform to the shape of the surface they are placed on, improving their ability to stay in place compared to solid materials that may not offer the same flexibility. This adaptability can be essential in ensuring that barricades remain effective and do not create hazards.

Other methods such as weight plates or concrete blocks can certainly be used, but they may not have as much versatility or ease of handling as sand bags. Ropes can assist in securing barricades but are not a standalone solution for providing stable support against environmental forces.