Which layout concerns aligning the bridge structure in the horizontal plane along the road alignment?

• A. Horizontal Layout
• B. Vertical Layout
• C. Plan View
• D. Elevation Layout

Answer: (A)

The main idea here is how the bridge is laid out in the horizontal plane to match the road’s path. Horizontal layout focuses on placing the bridge’s axis along the road centerline, handling straight segments, curves, transitions, and the exact locations of supports so the structure follows the same plan as the road when viewed from above. It’s about the geometry and stationing of the bridge in plan, ensuring the alignment fits the road layout. Plan view is the top-down representation of that alignment, while vertical layout deals with elevations and grade changes. So the aspect described—aligning the bridge along the road in the horizontal plane—is horizontal layout.