Which term describes the surface of a bridge that carries traffic?

• A. Bridge deck
• B. Bridge deck system
• C. Beam / Girder Bridge
• D. Roadway surface

Answer: (A)

The surface that carries traffic on a bridge is called the bridge deck. It is the horizontal element that vehicles ride on and that transfers loads from the pavement to the supporting structural elements like beams or girders. The deck is often made of concrete or steel and includes a wearing surface such as asphalt or concrete pavement.

A deck system is a broader term that can include the deck itself plus additional components like subdeck, waterproofing, and expansion joints, but the surface that actually carries the traffic is the bridge deck. A beam or girder bridge describes a type of structural configuration, not the surface. Roadway surface is a more general term and not the standard bridge engineering term for the load-bearing surface.

So the best term for the surface that carries traffic is the bridge deck.