A narrow bridge would be accounted for in _______ item.

• A. Deck Geometry
• B. Structural Capacity
• C. Load Bearing
• D. Approach Alignment

Answer: (A)

A narrow bridge is a matter of the deck’s dimensions and layout. Deck geometry covers the physical dimensions of the bridge deck—its width, alignment, and overall plan shape. When a bridge is narrow, the key factor is how wide the deck is and how that width affects traffic flow, clearance, and railing placement, which are geometric attributes of the deck rather than its strength or alignment with approaches.

Structural capacity and load bearing focus on how much weight the bridge can safely carry, not on how wide the deck is. Approach alignment concerns how the bridge connects to the roadways on either side, which is about alignment rather than the deck’s width. So the narrowness is best categorized under deck geometry.