The St Julian’s Viaduct is situated north of the city of Newport, and spans the river Usk, close to the M4 Malpas tunnels, and runs to the west of, and parallel with, Caerleon Road.

Originally built in 1874, and opened by Pontypool, Caerleon and Newport Railway; the bridge underwent refurbishment and strengthening in the 1960’s, and then more recently, in 2014, underwent further maintenance.

It is now the main line running from Newport train station, named the ‘Welsh Marches’ line, going north through Cwmbran, Pontypool, Abergavenny, Hereford, Shrewsbury, Crewe and on to Manchester.