계곡이나 낮은 지대 위로 도로 또는 철도를 연결하기 위해 아치형 구조물로 길게 만든 고가교나 육교.
A long bridge-like structure, typically consisting of a series of arches or spans, used to carry a road or railway over a valley, gorge, or other low-lying area.
예문:
"The train crossed the massive stone viaduct, offering passengers a breathtaking view of the valley below."
"Engineers are inspecting the structural integrity of the century-old railway viaduct."
"The city planned to build a new viaduct to alleviate traffic congestion in the downtown area."