| 31. | The original plan was to construct a carriageway with two shoulders.
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| 32. | Tsang was thrown onto the opposite carriageway and hit by a taxi.
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| 33. | Unlike Mortlake and Hammersmith, Barnes has no dual carriageways.
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| 34. | The A205 road commencing there passes through Kew as a single carriageway.
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| 35. | Route 3 interchanges with Route 120 and the carriageways separately.
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| 36. | Some major roads are dual carriageway, the others are single carriageway.
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| 37. | Some major roads are dual carriageway, the others are single carriageway.
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| 38. | Approaching Penzance, the A30 briefly becomes a dual carriageway once again.
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| 39. | The single-carriageway ?4m A46 opened in October 1990.
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| 40. | Here, a new dual-carriageway bypasses Kings Langley.
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