South Wales main line

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South Wales Main Line
Severn Tunnel April 2007.jpg
The entrance to the Severn Tunnel on the English side
Teep Heavy rail
Seestem National Rail
Status Operational
Locale Sooth Wales
Sooth Wast Ingland
Stations 18
Appent 1850 (Chepstow-Swansea)
1903 (Swindon-Patchway)
Awner Network Rail
Operator(s) Arriva Trains Wales
Great Western Railway
Chairacter Main line
Line lenth 84 miles 30 chains (135.79 km)
Nummer o tracks Mainly double track, though quadruple track from Severn Tunnel Junction via Newport to Cardiff Central.
Track gauge 4 ft 8 12 in (1,435 mm) staundart gauge
Electrification 25kV 50Hz AC OHLE
(Wootton Bassett to Cardiff Central by December 2018)

The South Wales Main Line (Welsh: Prif Linell De Cymru), oreeginally kent as the Lunnon, Bristol an South Wales Direct Railway or simply as the Bristol an South Wales Direct Railway, is a branch o the Great Western Main Line in Great Britain. It diverges frae the core Lunnon-Bristol line at Royal Wootton Bassett near Swindon, first calling at Bristol Parkway, efter which the line continues throu the Severn Tunnel intae South Wales.

Great Western Railway operates High Speed Trains atween Lunnon an South Wales an services atween Cardiff an South West England. CrossCountry provides services frae Cardiff tae Nottingham via Severn Tunnel Junction an thence the Gloucester tae Newport Line via Gloucester an Birmingham. Arriva Trains Wales operates services atween South Wales, an North Wales an the Midlands on the line.

It is planned tae electrify the line uisin the AC owerheid seestem, wi completion bi 2018.