Which equipment is specifically designed to reach under a bridge with an articulated boom while on the deck?

• A. Platform Equipped Underbridge Crane
• B. Underbridge Inspection Vehicle
• C. Shadow Vehicle
• D. Ladder

Answer: (B)

Reaching under a bridge from the deck with an articulated boom requires a toolbuilt for road-deck access and underside reach. The Underbridge Inspection Vehicle is designed exactly for this task: it operates on the bridge deck and uses a fully articulated boom to extend beneath the structure, allowing inspectors to examine the soffit, bearings, and other components from a stable, controlled position. It often includes outriggers for stability and mounts for cameras or sensors, making under-bridge inspection safe and efficient from the deck.

Other options aren’t as well suited for this specific need. A platform-equipped underbridge crane can reach under the bridge, but its primary purpose is lifting and working from a platform rather than dedicated underside inspection from the deck. A shadow vehicle is used mainly for traffic control and safety clearance, not for reaching under the bridge. A ladder cannot provide the necessary reach, stability, or safety for inspecting the underside.