A side street or back street often running parallel to a main street; an alleyway or less busy road compared with the main thoroughfare.
駅前の裏通りに古い喫茶店がある。
There's an old coffee shop on a side street in front of the station.
夜になるとこの裏通りはとても静かになる。
This back street becomes very quiet at night.
渋滞を避けるために裏通りを通った。
I went through a side street to avoid the traffic jam.