Drainage is responsible for:

• A. Removes water from bridge
• B. Carries traffic and transfers the live load
• C. Provides a smooth riding surface
• D. Minimizes hazards for traffic

Answer: (A)

Drainage on a bridge is about removing water from the deck. When water isn’t drained away, it can pool on the surface, seep into joints and concrete, and accelerate deterioration through corrosion, freeze-thaw damage, and pavement wear. By channeling rain and runoff off the deck quickly through gutters, scuppers, and proper deck slope, drainage keeps the surface dry and helps protect the structure and its components, which is the most direct way to prevent water-related problems and hazards.

The other choices describe important bridge aspects, but not the primary role of drainage: carrying traffic and transferring live load relates to the structural design, a smooth riding surface comes from pavement quality and maintenance, and while good drainage reduces hazards, its essential purpose is to remove water from the bridge.