What term describes obstacles that discourage the passage of persons or vehicles?

The term that best describes obstacles that discourage the passage of persons or vehicles is "barricades." Barricades are physical structures specifically designed to prevent access to certain areas, guiding movement and providing safety by restricting entry. They serve a vital function in various situations, such as construction sites, to protect workers, pedestrians, and vehicles from potential hazards.

In contrast, while barriers may also serve a similar function, they can refer to a broader range of obstacles that might not necessarily be designed for the specific purpose of blocking movement. Traffic controls typically refer to signals, signs, or laws designed to manage the flow of vehicles and ensure safe travel, rather than physical obstacles. Markings, such as lines painted on roads, are intended to provide guidance or information but do not serve as physical obstacles.

Understanding the distinction between these terms is important, as it helps clarify how each contributes to safety and navigation in various environments.