The North west Line of

Chennai Suburban Railway The Chennai Suburban Railway is a commuter rail system in the city of Chennai, Tamil Nadu, India, operated by the Southern Railways branch of Indian Railways. It is the second largest suburban rail network in terms of route length and the third ...

is the fifth longest line that runs west–north from

Chennai Chennai (, ), formerly known as Madras ( the official name until 1996), is the capital city of Tamil Nadu, the southernmost Indian state. The largest city of the state in area and population, Chennai is located on the Coromandel Coast of th ...

City. Suburban services terminate at

Tiruttani Tiruttani is a town in Tiruvallur district, suburb of Chennai within Chennai Metropolitan Area limit in state of Tamil Nadu, India. This town is famous for Tiruttani Murugan Temple which is one of the Arupadaiveedu and is dedicated to (Kartik ...

and MEMU services run till

Tirupati Tirupati () is a city in the Indian state of Andhra Pradesh. It is the administrative headquarters of the Tirupati district. The city is home to the important Hindu shrine of Tirumala Venkateswara Temple and other historic temples and is re ...

, across the state line in

Andhra Pradesh Andhra Pradesh (, abbr. AP) is a state in the south-eastern coastal region of India. It is the seventh-largest state by area covering an area of and tenth-most populous state with 49,386,799 inhabitants. It is bordered by Telangana to the ...

Sections

Chennai Central MMC - Thiruvallur

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

Thiruvallur - Arakkonam

* Suburban trains operate in the 2 main lines. * 3rd rail line is completed & 4th rail line will be completed in 2015. * 9-car and 12-car EMU are operated in this sector.

Arakkonam - Tiruttani

* Suburban trains operate in the 2 main lines.

Chennai Central MMC - Tirupati

* MEMU trains operate between Chennai Central and Tirupati. {{Railways in Southern India Chennai Suburban Railway