Deck Width is defined as the sum of the carriageway width, sidewalk width, shoulder width, and what else?

• A. Other elements required to form the cross section
• B. The bridge length
• C. The distance between abutments
• D. The vertical clearance

Answer: (A)

Deck width is the total width of the bridge deck as seen in plan, formed by all parts that make up the cross-section. You sum the carriageway, sidewalks, and shoulders, and then include any other elements that are part of the cross-section—such as curbs, rails or barriers, medians, bike lanes, and drainage features. These additional elements are what complete the cross-sectional width, while the other options refer to length or vertical clearance, not width. So the missing piece is the other elements required to form the cross section.