Arun Valley line

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Arun Valley line
Southern class 377 train bound for Victoria passes under the A29 road bridge south of Pulborough in West Sussex in 2009
Overview
Status	Operational
Owner	Network Rail
Locale	South East England
Termini	Littlehampton Three Bridges
Stations	11
Service
Type	Heavy rail
System	National Rail
Operator(s)	Southern Thameslink
Rolling stock	Class 377[1] Class 700[2]
History
Opened	1863
Technical
Line length	30 mi 46 ch (49.2 km) (Between Three Bridges and Arundel junctions)[3]
Number of tracks	2
Track gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Electrification	750 V DC third rail
Route map (Click to expand)

v t e Arun Valley line
Legend
Brighton Main Line to London Victoria & London Bridge Three Bridges Three Bridges to T. Wells Central Line to Tunbridge Wells Brighton Main Line to Brighton Crawley Ifield Faygate Roffey Road Halt Littlehaven Portsmouth Line to Peckham Rye Horsham Junction Horsham River Arun A24 Stammerham Junction Christ's Hospital Cranleigh line to Guildford Itchingfield Junction Steyning Line to Shoreham-by-Sea Billingshurst Pulborough River Arun Hardham Junction Midhurst Railways to Chichester & Petersfield Amberley North Stoke Tunnel ( 83 yd 76 m ) Arundel West Coastway line to Brighton Arundel Junction West Coastway line to Littlehampton & Barnham

The Arun Valley line, also known as the Mid Sussex line, is part of the Southern- and Thameslink-operated railway services. For the initial part of the route trains follow the Brighton Main Line, and at a junction south of Three Bridges the route turns westwards. It then runs via Crawley, Horsham (where there is a junction with the Portsmouth Line) and Arundel, before meeting the West Coastway line at Arundel Junction. Trains on the Arun Valley line then mostly proceed to either Bognor Regis or Portsmouth Harbour, with an additional peak hour service which first proceeds to Littlehampton, and subsequently to Bognor Regis.

Many stations on this line retain the short platforms which were originally built, not being extended by the Southern Railway when the line was modernised in the 1930s, nor by any subsequent operators. This causes operational difficulties to this day, which require frequent platform and on-train announcements with longer trains, telling passengers they must travel in the correct part of the train.