 | This article needs additional citations for verification. (January 2017) |
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| Major junctions | ||||
| North end | Abergavenny | |||
 A40 A465 A472 A4051 M4 J25a A48 | ||||
| South end | Newport | |||
| Location | ||||
| Country | United Kingdom | |||
| Primary destinations | Cwmbrân | |||
| Road network | ||||
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The A4042 is a trunk road that runs from Abergavenny to Newport in south Wales.