The station has 17
bay platforms including five at the suburban terminal. The platforms one to eleven, averaging about in length, can accommodate trains with up to 24 coaches. A shorter platform designated as 2A, can accommodate trains with 18 coaches. There are various waiting areas with the main waiting hall capable of accommodating up to 1,000 people. However, the main concourses are often crowded. The station has three
split-flap timing boards, and electronic display boards, that mention train timings and platform number. There are seven passenger operated enquiry terminals, a passenger information center, and information kiosks. However, most platforms are not equipped with individual coach position display boards. On 26 September 2014, Chennai Central became the first in the country to get free Wi-Fi connectivity. The facility is being provided by RailTel, a public sector telecom infrastructure provider. There are various commercial establishments such as bookshops, restaurants, and eateries inside the station.
Drinking water is supplied by taps located along the platforms. In September 2018, a 5,000-litre
reverse osmosis plant was commissioned in the station, with the water distributed through kiosks located across the platforms. The station has about ten toilets. Licensed railway porters provide baggage services to the passengers. Four-seater battery operated vehicles are available for ferrying passengers. Following a
Madras High Court order in 2012, a medical care centre was opened on 15 April 2013. The centre has three beds, and is staffed with three doctors, four nurses, and a paramedic team. It is equipped with oxygen cylinders, an
electrocardiogram, a
defibrillator, resuscitation equipment, and an ambulance. The station has parking facilities for about 1,000 two-wheelers, and four-wheelers each. A premium car park, with a capacity to accommodate 80 cars, is located between the main building and suburban terminal. The station is divided into two zones for cleaning and maintenance, staffed by about 70 personnel. Trains arriving at the station undergo primary maintenance, which involves exterior and interior cleaning, filling water, cleaning of toilets, and required mechanical and electrical overhaul. About 405 maintenance employees are employed by the Indian Railways.
Security The
Railway Protection Force is responsible for the security of the station. A government railway police station is located on the first floor, and is headed by a
deputy superintendent. The police operate a helpline known as
Kaakum karangal ('Protecting hands'). The station is divided into six sectors and is staffed by 24 police personnel. In May 2022, a
bomb squad started functioning at the station. In 2009, a security boundary wall was erected along the western side, and surveillance cameras were installed at the platforms in the suburban terminal. Two security booths were established, one each at the main and the suburban terminii. In 2009, 39
CCTV cameras were installed in the main terminal and a central control room was established. In 2012, about 120 cameras were added in the station. On 15 November 2012, an integrated security system was launched at the station, which included installation of 54 IP-based cameras, under-vehicle scanning system at entries and exits, and personal and X-ray baggage screening systems. In addition, explosive detection and disposal squads were deployed. Existing cameras were also integrated to the news system. == Network and services ==