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Noun: dual carriageway
Usage: Brit (N. Amer: divided highway)
  1. A highway divided down the middle by a barrier that separates traffic going in different directions
    "in Britain they call a dual carriageway a dual carriageway";
    - divided highway [N. Amer]

Derived forms: dual carriageways

Type of: highway, main road

Encyclopedia: Dual carriageway