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South-West Line
Overview
Status	Operational till Arakkonam
Termini	Chennai Beach (Madras Beach) Arakkonam
Stations	39
Service
Type	Suburban railway
System	Chennai Suburban Railway
Operator(s)	Southern Railway (India)
Depot(s)	Tambaram, Egmore
Technical
Line length	122.71 km
Track gauge	Broad Gauge
Operating speed	90 km/h (maximum service speed)
Route map Legend Chennai Beach — Arakkonam North Line West Line 0.00 Chennai Beach High Court 1.80 Chennai Fort  MRTS  3.07 Chennai Central Green Line Blue Line 3.07 Chennai Park 3.07 Parktown MRTS 4.32 Chennai Egmore Green Line 6.56 Chetput Purple Line Cooum River 8.15 Nungambakkam 9.68 Kodambakkam Orange Line 11.29 Mambalam 12.90 Saidapet Adyar River 15.01 Guindy Blue Line 17.12 St. Thomas Mount Green Line Red Line  MRTS  18.75 Pazhavanthangal 20.04 Meenambakkam 21.22 Tirusulam Blue Line 23.15 Pallavaram 25.35 Chromepet Blue Line 27.36 Tambaram Sanatorium 29.14 Tambaram Blue Line 32.64 Perungalathur Blue Line 34.44 Vandalur Blue Line 37.48 Kilambakkam Blue Line 37.50 Urapakkam 40.41 Guduvancheri 43.94 Potheri 45.85 Kattangulathur 46.96 Maraimalai Nagar 51.48 Singaperumal Koil 55.59 Paranur 59.84 Chengalpattu Junction to Viluppuram Junction 64.65 Reddypalayam 67.89 Villiambakkam 71.33 Palur 74.70 Palayasivaram 81.59 Walajabad 89.11 Nathapettai 94.52 Kanchipuram East 95.82 Kanchipuram 108.39 Tirumalpur 116.04 Thakkolam 122.71 Arakkonam West Line towards Jolarpettai West North Line towards Tirupati West Line towards Chennai Central

The South West Line of Chennai Suburban Railway is the sixth longest suburban line that runs south-west from Chennai (Madras) City.

• This section has 2 dedicated lines for the suburban train operations apart from 2 main lines for mixed traffic.
• EMUs are operated along 3rd and 4th main lines during peak hours.
• 12-car EMU are operated in this sector.

• This section has 3 dedicated lines for the suburban trains operations apart from 1 main line for mixed traffic
• 4th line is planned.
• 12-car EMU are operated in this sector.

• This section has decidated 1 line for the suburban trains and mixed traffic
• 2nd line is planned
• 12-Car EMU is operated in this sector