What is the general term for a structure that carries traffic over an obstacle?

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Multiple Choice

What is the general term for a structure that carries traffic over an obstacle?

Explanation:
A bridge is the term for a structure that carries traffic over an obstacle. It spans a gap—like a river, valley, or road—so vehicles and pedestrians can cross without detouring. Bridges come in many designs, but their shared purpose is to connect the two sides by spanning the obstacle. A drawbridge is a specialized type of bridge that can open to let ships pass. A tunnel goes underneath the obstacle, and a marsh is a wetland, not a crossing structure.

A bridge is the term for a structure that carries traffic over an obstacle. It spans a gap—like a river, valley, or road—so vehicles and pedestrians can cross without detouring. Bridges come in many designs, but their shared purpose is to connect the two sides by spanning the obstacle. A drawbridge is a specialized type of bridge that can open to let ships pass. A tunnel goes underneath the obstacle, and a marsh is a wetland, not a crossing structure.

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