noun
on the road; on the street; in the street
Refers to something located, happening, or being done on a road or street. Common in compounds and phrases such as 路上駐車, 路上ライブ, and 路上で.
路上に車を止めないでください。
Please do not park your car on the street.
彼は駅前の路上でギターを弾い
He was playing guitar on the street in front of the station.
noun
on the way; along the way; during a journey
A less common, more written use referring to the course of travel or a journey. In ordinary conversation, 途中 is usually more direct for 'on the way.'
旅の路上で見聞きしたことを日記に書いた。
I wrote in my diary about what I saw and heard along the way on my journey.