
The Kolkata Metro is a rapid transit system serving the city of Kolkata and the Kolkata Metropolitan Region in West Bengal, India. Opened in 1984, it was the first operational rapid transit system in India. Currently it is the second busiest and fifth longest rapid transit system in India. As of now, it has one fully operational, and three partly operational lines for a total of 59.38 km (36.90 mi). Two other lines are in various phases of construction and planning. The system has a mix of underground, at-grade, and elevated stations using both broad-gauge and standard-gauge tracks. It operates on a 750 V DC Third rail system. Trains operate between 06:50 and 22:40 IST and the fares range from ₹5 to ₹50.

Esplanade is an underground interchange metro station on the north–south corridor of the Blue Line and on the east–west corridor of the [[Green Line |] of Kolkata Metro in Kolkata, West Bengal, India. This station, which is the biggest in the city, is located in the Esplanade neighbourhood of Kolkata, at the northern end of Chowringhee Road/Jawaharlal Nehru Road near New Market and the Oberoi Grand hotel. It opened in 1984 as part of what is now the Blue Line. The station is re-designed to be the largest station of the metro system and will function as the interchange station between Blue, Green and Purple Lines. The Line-2 complex, built below the Line-1 complex was completed and inaugurated on 6 March 2024. The Line-2 complex is designed with world class amenities and murals that depict the culture, tradition, sports, monuments, important structures, etc. in them.

Blue Line is a rapid transit metro line of the Kolkata Metro in Kolkata, West Bengal, India. It consists of 26 operational stations from Dakshineswar to Kavi Subhash, out of which 9 of the stations are elevated, 2 are at-grade and the remaining 15 are underground. With a total distance of 32.13 km (19.96 mi), the line connects Dakshineswar and New Garia and uses 5 ft 6 in broad gauge tracks. This line was the first underground railway to be built in India, with the first operations commencing in October 1984 and the full stretch that was initially planned being operational by February 1995. On 28 December 2010, Kolkata Metro became the 17th zone of the Indian Railways. Being the country's first, and a completely indigenous process, the construction of the Kolkata Metro Blue Line was more of a trial-and-error affair, in contrast to the Delhi Metro, which has seen the involvement of numerous international consultants. As a result, it took nearly 23 years to completely construct around 15 km (9.3 mi) underground railway from Birpara up to Tollygunge.

Green Line is a rapid transit metro line of the Kolkata Metro in Kolkata, West Bengal, India. It currently consists of two distinctly operational sections from Salt Lake Sector-V to Sealdah, and Esplanade to Howrah Maidan by going underneath the Hooghly River. A future eastern extension from Sector-V to Teghoria is planned. It will cover a distance of 22 km (14 mi) and consist of 17 stations from Teghoria (Haldiram) in the east to Howrah Maidan in the west, of which it will consist of 11 elevated and 6 underground stations, and the operational section consists of 6 elevated and 6 underground stations, with a total distance of 13.1 km (8.1 mi). It is expected to derive a very high ridership, since it will connect India's two largest commuter railway and long-distance railway terminals, Howrah and Sealdah, along with two of its largest business districts, BBD Bagh and Salt Lake Sector V. At present, more than 100,000 passengers commute through the line every day, and this figure is expected to go up to 1 million after it gets fully completed by 2035. It will also connect the industrial hub of Kolkata, i.e., Howrah and the IT hub of Kolkata, i.e., Salt Lake Sector-V. It has interchange with Blue Line at Esplanade and will eventually connect with Purple and Orange Lines.

Noapara is the largest elevated metro station on the North-South corridor of the Blue Line of Kolkata Metro in Noapara, Baranagar, Kolkata, West Bengal, India. It opened on 10 July 2013.

New Garia railway station is a Kolkata Suburban Railway station on the Main line. It is under the jurisdiction of the Sealdah railway division in the Eastern Railway zone of the Indian Railways. It serves the local area of New Garia in Kolkata in the Indian state of West Bengal.

Orange Line is a rapid transit metro line of the Kolkata Metro in Kolkata, West Bengal, India. It will connect New Garia with Netaji Subhas Chandra Bose International Airport via two major satellite towns of Kolkata metropolitan region, Salt Lake and New Town. It currently operates between Kavi Subhash and Hemanta Mukhopadhyay. This line will be one of the most important stretches of Kolkata Metro because it will connect the southern and the eastern parts of the city with Kolkata Airport. The total distance of this route will be 29.87 km (18.56 mi). It has an interchange with Blue Line at Kavi Subhash and will eventually connect with Green Line near IT Centre and Yellow Line at Jai Hind.

Satyajit Ray is a metro station of the Orange Line in Chak Garia, E.M. Bypass, Kolkata, India. The station is named in honour of the great Bengali filmmaker Satyajit Ray. The elevated structure is located above the Eastern Metropolitan Bypass with the Satyajit Ray Film and Television Institute and the Baghajatin Peerless Hospital on the eastern side and the Hiland Park condominium on the western side. This metro station would serve the neighbourhoods of Baghajatin, Chak Garia, Survey Park and Santoshpur of South Kolkata.

Howrah Maidan Metro Station is the terminal station of Kolkata Metro's Green Line in Howrah Maidan, Howrah, India. The underground station is located near the Howrah Municipal Corporation Stadium and the Howrah Sarat Sadan. The station was completed and inaugurated on 6th March 2024. Though being similar to any Blue Line underground station, it is made with world class amenities and patronage to football, the main sport of the state.
Mahakaran, is a metro station on Green Line of Kolkata Metro, located in B.B.D. Bagh. There are many British heritage buildings near the station with the Lal Dighi adjoining it. The tracks leaving the station towards Howrah go underneath the Hooghly river through the biggest underwater metro tunnel of India. The station was completed and opened on 6 March 2024. The station, though comparing without platform screen doors, may look similar to any Blue Line underground station, but it is actually very different as it is designed with world class facilities and murals that pay tribute to the locality and Indian freedom fighters. The nearest railway station is B.B.D. Bagh railway station. Just before the tunnel enters the underwater segment, lies a ventilation shaft on the Kolkata bank of Hooghly River, which is the deepest of its kind in India, at 44 metres (144 ft) below ground level.

Barun Sengupta, is a station of Orange Line of the Kolkata Metro located at Parama Island in the Dhapa area of Kolkata, West Bengal, India, serving Dhapa, ITC Royal Bengal, JW Marriott and Science City areas. The station is named in honour of the founder of Bartaman, Barun Sengupta. The station is elevated above the Eastern Metropolitan Bypass.

Gour Kishore Ghosh is a station of Orange Line of the Kolkata Metro near the Chingrighata crossing, Tangra at Sukanta Nagar in Bidhannagar. The station is named in honour of famous Bengali writer and journalist, Gour Kishore Ghosh.
East–West Metro Tunnel is an underwater river tunnel of Kolkata Metro in Kolkata, West Bengal. The river tunnel is constructed underneath Hooghly River. It is the biggest underwater river tunnel of India, which is made for metro rail service. The East–West Metro Tunnel length is 10.8 km (6.7 mi) and width is 5.5 metres. A 520 m stretch of the tracks goes through a tunnel under the Hooghly River. The roof of the tunnel is about 30 metres from the ground level. The tunnel was completed in 2021. The tunnel is used by Green Line, also known as East–West Metro Line, for metro rail service by Kolkata Metro Rail Corporation and it was constructed by Afcons Infrastructure.

Jyotirindra Nandi is a metro station of Orange Line of the Kolkata Metro. The station serves Mukundapur, Santoshpur and Ajoy Nagar areas outlying the E.M. Bypass section of the city.

Kavi Sukanta is a station on the Orange Line of the Kolkata Metro in Kalikapur, a southern neighbourhood of Kolkata, India, serving the areas of Kalikapur, Haltu, Prince Anwar Shah Road and Nandi Bagan. The station is named in honour of the revolutionary Bengali poet Sukanta Bhattacharya.

Hemanta Mukhopadhyay is a Metro station of Orange Line of the Kolkata Metro at Ruby Crossing, serving the areas of E.M. Bypass, Kasba and Anandapur. The station is named in honour of the Indian Bengali playback singer Hemanta Mukhopadhyay.

Nalban is a station of Orange Line of the Kolkata Metro. It is situated at just beside of Nicco Park. It will serve the area of Nalban, Salt Lake Sector IV and surrounding areas in Bidhannagar, Kolkata. The station is named after its adjacent locality, Nalban.

Beleghata, is a station of Orange Line of the Kolkata Metro located in Beleghata at Biswa Bangla Sarani, Dhapa of Kolkata, West Bengal, India, serving Beleghata and Metropolitan areas. The station is elevated beside the Eastern Metropolitan Bypass.

VIP Bazar is a station of Orange Line of the Kolkata Metro located in the Tagore Park area of Kolkata, West Bengal, India, serving Tiljala and VIP Nagar areas. The station is named after the nearby market called, VIP Bazar. The station is elevated above the Eastern Metropolitan Bypass. VIP Nagar and VIP Bazar are located next to the station.

Ritwik Ghatak, is a station of Orange Line of the Kolkata Metro located in the Topsia area of Kolkata, West Bengal, India, serving Topsia and Uttar Panchanagram areas. The name of the station has been given on the famous film director, Ritwik Ghatak. The station is elevated above the Eastern Metropolitan Bypass.