What is the act of positioning a responder vehicle upstream of the incident to shield the area and responders called?

• A. Blocking
• B. Conspicuity
• C. Detour
• D. Contain

Answer: (A)

Blocking is the act of positioning a responder vehicle upstream of the incident to shield the area and responders. By placing a vehicle in the path of oncoming traffic ahead of the scene, responders create a physical barrier that slows or stops vehicles, reducing the risk of secondary crashes and giving crews space to work safely. This maneuver often uses the first arriving unit parking at an angle with lights on and might include cones or other markers to clearly indicate the blocked zone and guide traffic away. Conspicuity is about making the scene and responders more visible, not about creating the barrier itself. Detour involves redirecting traffic to an alternate route, which may be used alongside blocking but serves a different purpose. Contain refers to isolating the hazard or incident area, rather than shielding traffic.