The road measures 18.11 miles long and would take a car obeying speed limits 25 minutes to travel its length.
The A4042 is a A Road and is located in the Zone 4 Highways Region.
This is a true long-distance route, journeying through numerous towns like ABERGAVENNY, Hardwick, Llanellen, Llanover, Nantyderry, Penperlleni, Mamhilad, Cwmoody, Llanvihangel, New Inn, Griffithstown, Croesyceiliog, Llanfrechfa, Llanyravon, Llantarnam, Caerleon, and NEWPORT.
The road is located entirely within Gwent.