Which term refers to solid concrete walls or barriers installed along the sides of a bridge for high containment or rollover risk?

• A. Concrete Balustrade
• B. Precast Concrete Railings
• C. Concrete Bridge Railing
• D. Concrete Parapets

Answer: (D)

The edge protection on a bridge that provides a solid, continuous barrier to keep vehicles from leaving the structure or rolling over is a concrete parapet. Parapets are built as solid walls along the sides of the bridge, forming a continuous barrier that resists containment or rollover risks. This is different from a balustrade, which uses vertical posts and a handrail and often includes gaps; a precast concrete railing is modular and typically features openings between elements; and a general concrete bridge railing can refer to various railing types that may not be solid barriers. For high containment needs, the solid, continuous nature of a concrete parapet makes it the appropriate term and choice.