noun
street tree; roadside tree; trees lining a road
Refers to trees planted along streets, avenues, or roads, often as part of urban landscaping.
この通りには大きな街路樹が並んでいる。
Large street trees line this avenue.
秋になると、駅前の街路樹が黄色く色づく。
In autumn, the roadside trees in front of the station turn yellow.
Means a street or road itself; 街路樹 adds 樹, meaning the trees planted along it.
A Sino-Japanese compound of 街路, meaning street or road, and 樹, meaning tree.