Central Station / Madras Central

Chennai Central Railway Station, (officially Puratchi Thalaivar Dr. M.G. Ramachandran Central Railway Station), formerly known as Madras Central (station code: MAS), is the main railway terminus in the city of Chennai, Tamil Nadu, India. 

Suburban Railway Station

Chennai suburban railway is a commuter rail system in the Indian city of Chennai (Madras) operated by the Southern Railway. Chennai has a complex railway network. The system uses Electrical Multiple Units (EMU) operating on Alternating Current (AC) drawn from over-head cables through the catenary system. The total system spans around 900 km of which only 286 km have dedicated duel tracks for suburban EMUs, the rest share tracks with other trains and are called Mainline EMUs (MEMUs).