The Paris Métro, short for Métropolitain, is a rapid transit system serving the Paris metropolitan area in France. A symbol of the city, it is known for its density within the capital's territorial limits, uniform architecture and historical entrances influenced by Art Nouveau. The system is 245.6 kilometres (152.6 mi) long, mostly underground. It has 320 stations of which 61 have transfers between lines. Operated by the Régie autonome des transports parisiens (RATP), it has sixteen lines, numbered 1 to 14, with two lines, Line 3bis and Line 7bis, named because they used to be part of Line 3 and Line 7, respectively. Three lines are automated. Lines are identified on maps by number and colour, with the direction of travel indicated by the terminus.
The Moscow Metro is a metro system serving the Russian capital of Moscow as well as the neighbouring cities of Krasnogorsk, Reutov, Lyubertsy and Kotelniki in Moscow Oblast. Opened in 1935 with one 11-kilometre (6.8 mi) line and 13 stations, it was the first underground railway system in the Soviet Union.
The Washington Metro, often abbreviated as the Metro and formally the Metrorail, is a rapid transit system serving the Washington metropolitan area of the United States. It is administered by the Washington Metropolitan Area Transit Authority (WMATA), which also operates the Metrobus service under the Metro name. Opened in 1976, the network now includes six lines, 98 stations, and 129 miles (208 km) of route.
A metro station or subway station is a train station for a rapid transit system, which as a whole is usually called a "metro" or "subway". A station provides a means for passengers to purchase tickets, board trains, and evacuate the system in the case of an emergency. In the United Kingdom, they are known as underground stations, most commonly used in reference to the London Underground.
The Tokyo Metro is a major rapid transit system in Tokyo, Japan, operated by the Tokyo Metro Co. With an average daily ridership of 6.52 million passengers, the Tokyo Metro is the larger of the two subway operators in the city; the other being the Toei Subway, with 2.85 million average daily rides.
The Mumbai Metro is a rapid transit system serving the city of Mumbai and the wider Mumbai Metropolitan Region in Maharashtra, India.
The Dubai Metro is a rapid transit system in the city of Dubai, United Arab Emirates. It is currently operated by a consortium of the French company Keolis and Japanese company MHI, as Keolis-MHI. The metro system consists of a network of two main lines: the Red Line and the Green Line, with more lines planned for future expansion.
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. As of October 2024, it has four operational lines: the 32.13 km (19.96 mi) long Line 1 from Dakshineswar to Kavi Subhash, 14.1 km (8.8 mi) long Line 2 from Salt Lake Sector V to Howrah Maidan, 7.75 km (4.82 mi) long Line 3 from Joka to Majerhat and 5.4 km (3.4 mi) long Line 6 from Kavi Subhash to Hemanta Mukhopadhyay for a total of 59.38 km (36.90 mi). Two other lines named Line 4 and Line 5 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.
Namma Metro, also known as Bengaluru Metro, is a rapid transit system serving the city of Bengaluru, the capital city of the state of Karnataka, India. It is the second-longest operational metro network in India with an operational length of 76.95 kilometers, just behind Delhi Metro. Upon its inauguration in 2011, it became the first underground metro system in South India. Namma Metro has a mix of underground, at grade, and elevated stations. Out of the 68 operational metro stations of Namma Metro as of November 2024, there are 59 elevated stations, eight underground stations and one at-grade station. The system runs on standard-gauge tracks.
The Thessaloniki Metro is an underground rapid-transit system in Thessaloniki, Greece's second largest city. The system consists of a single line with 13 stations; a further 5 stations are under construction for Line 2. It is fully automated and driverless, the first system of its kind in Greece, and is operated by Thessaloniki Metro Automatic (THEMA), a Franco-Italian consortium.
The Yellow Line is a rapid transit metro line of the Delhi Metro in Delhi, India. It consists of 37 stations from Samaypur Badli in Delhi to Millennium City Centre in the neighbouring city of Gurgaon in Haryana. The 49.02 kilometers (30.46 mi) line is mostly underground and laid under one of the most congested parts of Delhi. The Yellow Line is the second line of Delhi Metro to become operational after the Red Line.
The Blue Line is a rapid transit metro line of the Delhi Metro in Delhi, India. Predominantly elevated, it is the longest line on the network and consists of a Main Line(Line 3) with 50 stations from Noida Electronic City to Dwarka Sector 21, spanning a length of 56.11 kilometres, and a Branch Line(Line 4) consisting of 8 stations from Vaishali to Yamuna Bank, with a length of 8.51 kilometres.
The Chennai Metro is a rapid transit system serving the city of Chennai, India. Operated by Chennai Metro Rail Limited (CMRL) – a joint venture between the Government of India and the State Government of Tamil Nadu, the network consists of two lines and spans 54.1 km (33.6 mi). The system uses standard gauge and has 41 underground and elevated stations.
The Hyderabad Metro is a rapid transit system, serving the city of Hyderabad, Telangana, India. It is the third longest operational metro network in India after Delhi Metro and Namma Metro (Bengaluru), and the lines are arranged in a secant model. It is funded by a public–private partnership (PPP), with the state government holding a minority equity stake. Hyderabad Metro is the world's largest elevated Metro Rail system based on DBFOT basis. A special purpose vehicle company, L&T Metro Rail Hyderabad Ltd (L&TMRHL), was established by the construction company Larsen & Toubro to develop the Hyderabad metro rail project.
Rapid transit or mass rapid transit (MRT) or heavy rail, commonly referred to as metro, is a type of high-capacity public transport that is generally built in urban areas. A grade separated rapid transit line below ground surface through a tunnel can be regionally called a subway, tube, metro or underground. They are sometimes grade-separated on elevated railways, in which case some are referred to as el trains – short for "elevated" – or skytrains. Rapid transit systems are railways, usually electric, that unlike buses or trams operate on an exclusive right-of-way, which cannot be accessed by pedestrians or other vehicles.
The Delhi Metro is a rapid transit system that serves Delhi and the adjoining satellite cities of Ghaziabad, Faridabad, Gurugram, Noida, Bahadurgarh, and Ballabhgarh in the National Capital Region of India. The system consists of 10 colour-coded lines serving 256 stations, with a total length of 350.42 kilometres (217.74 mi). It is India's largest and busiest metro rail system and the second-oldest, after the Kolkata Metro. The metro has a mix of underground, at-grade, and elevated stations using broad-gauge and standard-gauge tracks. The metro makes over 4,300 trips daily.
The Riyadh Metro is an automated driverless rapid transit system in Riyadh, Saudi Arabia. Partially opened with 3 out of the 6 lines on December 1, 2024, it is part of the King Abdulaziz Project for Riyadh Public Transport.
The Pink Line is a metro rail line of the Delhi Metro, a rapid transit system in Delhi, India. It consists of 38 metro stations from Majlis Park to Shiv Vihar, both in North Delhi.
The Magenta Line is a metro rail line of the Delhi Metro, a rapid transit system in Delhi, India and the first driverless metro in India. The line, which trundles across South Delhi and is majorly underground, spans 37.46 kilometers (23.28 mi) and consists of 25 metro stations: 10 are elevated and the rest are underground. Unlike the Airport Metro Express, this line directly serves Terminal 1 of the Indira Gandhi International Airport.
Cheraghi Expressway, Districts 17-19, Tehran, Tehran County 
