The South West Line of Chennai Suburban Railway is the sixth longest suburban line that runs south-west from Chennai (Madras) City.
Sections Beach — Tambaram 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.
Tambaram — Chengalpattu 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.
Chengalpattu — Kanchipuram — Arakkonam This section has dedicated 1 line for the suburban trains and mixed traffic 2nd line is planned 12-Car EMU is operated in this sector
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