Dual carriageway and Toll road

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

Toll road and dual carriageway are semantically related. In some cases you can use "Toll road" instead a noun phrase "Dual carriageway".

Toll road noun - An expressway on which tolls are collected.

Dual carriageway and toll road are semantically related. Sometimes you can use "Dual carriageway" instead a noun phrase "Toll road".