West Line, Chennai Suburban

The West line of Chennai Suburban Railway is the second longest line running west from MGR Chennai Central (Madras Central) to Jolarpettai covering a distance of 213 km. Suburban services terminate at Arakkonam and MEMU services run to Jolarpettai. As of 2009, around 400,000 commuters travel every day on the 171 suburban services operated in the Arakkonam-Chennai central section.

Chennai Central MMC - Thiruvallur

 * This section has 2 dedicated lines for suburban train operations and 2 main lines.
 * Some fast local EMUs are operated along 3rd and 4th main lines during peak hours.
 * 9-car EMU and 12-car EMU are operated in this sector.
 * 5th and 6th rail lines are planned.

Tiruvallur - Arakkonam

 * There are 2 dedicated lines for suburban trains and 2 lines for mixed traffic.
 * 9-car and 12-car EMU are operated in this sector.

Arakkonam - Katpadi

 * No Suburban EMU trains operate in this section of west line.
 * Only 5 MEMU Service operated from Arakkonam to Katpadi.

Katpadi - Jolarpet

 * MEMU operates between Arakkonam and Jolarpet.