A4042 road
| A4042 road in the UK | |
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| Basic data | |
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| Start of the street: | Newport |
| End of street: | Abergavenny |
| Overall length: | 29.3 km (18.2 mi ) |
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| The A4042 as seen from the Pillmawr Road Bridge, looking south (photo 2009) | |
The A4042 road ( English for road A4042 ) is a designated primary route for almost its entire length , 167 km long trunk road , which leads from Newport (Gwent) ( Welsh Casnewydd ) to Abergavenny ( Welsh Y Fenni ).
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The almost 30 km long road starts in Newport on the A48 road , crosses the M4 motorway at junction 25A , becomes the primary route there, then bypasses Cwmbran and Pontypool (in Welsh Pont-y-pŵl ) to the east and runs in north towards north Pontypool for around 5 km together with the A472 road . The four-lane expansion ends where the two streets separate again. The A4042 continues north and ends at the junction with the A40 road and the A465 road at Abergavenny.