The North Line of the Chennai Suburban Railway is the third-longest suburban rail line in the system, running north from Chennai Central MMC to Bitragunta in Andhra Pradesh.

[2] Commuters on the Chennai Central-Gummidipoondi suburban line are concerned about irregular train services, poor maintenance and lack of amenities such as drinking water, public convenience and security in the stations.

The memorandum of understanding (MoU) for exchange of land between the Southern Railways and Chennai Port Trust was signed in 2015 to commission the third and fourth lines.

The fourth line between Chennai Beach and Athipattu costs ₹ 1200 million running to a length of 22.1 km.

The third line between Chennai Beach and Korukkupet will run for a length of 4.1 km at a cost of ₹ 1,420 million and is expected to be completed by March 2018.