noun
road bridge; highway overpass
Refers to a bridge carrying a road, especially an overpass crossing another road or railway. Often used in technical or civil engineering contexts.
この道路橋は高速道路の上を通っている。
This road bridge passes over the expressway.
新しい道路橋の建設が来月始まる。
Construction of the new road bridge will begin next month.
陸橋 is a more common term for an overpass or pedestrian bridge, whereas 道路橋 emphasizes its function as a road-carrying structure.
Compound of 道路 (road) and 橋 (bridge). The reading どうろきょう is a straightforward combination of the on'yomi readings of the kanji.