What is the portion of a bridge that directly contacts vehicles and must be smooth and durable?

• A. Bridge pavement
• B. Substructure
• C. Superstructure
• D. Deck slab

Answer: (A)

The riding surface used by vehicles is the bridge pavement. This top layer is designed to be smooth to provide safe, comfortable travel and durable to withstand repeated traffic loads, weather, and wear over time. It sits on the deck and is the actual surface that tires contact, making it the critical layer for ride quality and longevity. The deck slab is the structural base of the deck, while the substructure and superstructure are the supporting elements; they don’t contact vehicles directly. So the portion that directly faces traffic and must be smooth and durable is the bridge pavement.