Dual carriage way and Divided highway

Divided highway and dual carriage way are semantically related. In some cases you can use "Divided highway" instead a noun phrase "Dual carriage way".

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

Dual carriage way and divided highway are semantically related. Sometimes you can replace phrase "Dual carriage way" with "Divided highway", this phrases are similar.