Back street and Dual carriageway

Back street noun - A narrow street with walls on both sides.

Dual carriageway and back street are semantically related. In some cases you can use "Dual carriageway" instead a noun phrase "Back street".

Dual carriageway noun - A highway divided down the middle by a barrier that separates traffic going in different directions.

Back street and dual carriageway are semantically related. Sometimes you can use "Back street" instead a noun phrase "Dual carriageway".