| 11. | In 1968 a dual carriageway 3 km deviation was opened at Prospect.
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| 12. | The cairn itself lies between the dual carriageways of the A591 road.
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| 13. | This includes further dual carriageway improvements east of Honiton towards the Blackdown Hills.
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| 14. | This work incorporated the dual carriageway Springwood bypass, opened in 1967.
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| 15. | The road is dual carriageway and passes over the Kaveri river.
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| 16. | The road is for much of its course a dual carriageway.
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| 17. | The lorry travelled through the central reservation of the dual carriageway.
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| 18. | The parkway is dual carriageway for the entirety of its length.
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| 19. | Approaching Penzance, the A30 briefly becomes a dual carriageway once again.
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| 20. | Away from motorways, a regional dual carriageway network meets in Leeds.
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