| 21. | The plans for a new dual carriageway were revived in the early 1980s.
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| 22. | The road was widened to become a dual carriageway in 1937.
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| 23. | It comprised a dual carriageway starting from Dantziger strasse, running eastward.
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| 24. | Traffic lights and junctions are permitted at grade on dual carriageways.
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| 25. | A new dual carriageway link road ( N11 has been completed.
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| 26. | Exiting north from Balsall Common, the road becomes a dual carriageway.
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| 27. | This completed a continuous dual carriageway road from Glasgow to Ayr.
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| 28. | The highway is a dual carriageway for most of its length.
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| 29. | Dual carriageways of this class differ from motorways in a number of ways.
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| 30. | West of Greenodd the road switches between periods of single and dual carriageway.
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