There are quite a few companies in the transport sector that are under the aegis of the Indian government. I addition to the state controlled regional transport corporations, there are agencies run by central government too. The details are provided below:

List of Government Transport Companies in the North Zone

• Delhi Transport Corporation – This is one amongst the most popular transport operators in the city of Delhi.  This firm is acknowledged as the biggest condensed natural gas run bus service operator in the world.
• Delhi Metro - This is one of the newly formed companies in Delhi which launched the well acclaimed metro line project in the capital city of India
• Department of Road Transport & Highways - This is an initiative under the aegis of the Central Government. The main aim of this firm is to increase the efficiency as well as mobility of the road transport of our Country.
• Haryana State Road Transport Corporation – This is a bus service that functions within the state of Haryana. The buses run within the city as well as routes in neighboring states.
• Himachal Pradesh Road Transport Corporation – This is a bus service that is run by the state of Himachal Pradesh. This firm provides transit facility to its commuters within the state and in neighboring states.
• India International Airways Ltd - The India International Airways Ltd was started in the year 1990. The organization works under the aegis of the Indian government. The IIA possess a fleet of fixed wing aircrafts as well as a huge fleet of helicopters designed to cater the needs of people form all sectors.
• Jammu and Kashmir State Road Transport Corporation – This is a bus service that functions within the state of Jammu and Kashmir.
• Northern Railways - The Northern Railways has its headquarters in Delhi at the New Delhi Railway Station. The Northern Railways is acknowledged as one amongst the nine old railway zones in India. This railway zone was founded on the 14th of April, 1952. It is today one of the biggest railways lines in the north of India.
• Punjab State Road Transport Corporation – This is a bus service that is run by the state of Punjab.

List of Government Transport Companies in the Central Zone

• Madhya Pradesh State Road Transport Corporation - This is a bus service that is run by the state of Madhya Pradesh.
• Uttar Pradesh State Road Transport Corporation (UPSRTC) - The UPSRTC is a passenger road transport firm that functions under the government of India. This corporation provides service within the state of Uttar Pradesh as well as other neighboring areas in the Northern part of India.
• Bihar State Road Transport Corporation – This is a bus service that is run by the state of Bihar.

List of Government Transport Companies in the East Zone

• Air India Express - This is one of the popular airline companies in India. This firm is located in the southern state of Kerala. This airline belongs to the Air India Charters Limited. Currently, the Air India Express operates as much as 100 flights a week.
• Central Inland Water Transport- This is a Public Sector firm that is concerned with the transportation or shipping of goods from one nation to another. This organization has a total annual turnover of 10-100 Crores and is acknowledged as one of the finest shipping companies in India.
• Arunachal Pradesh State Road Transport Corporation – This is a bus service that is managed by the state of Arunachal Pradesh. This firm operates numerous regular bus services to a variety of places in Arunachal Pradesh as well as in its neighboring states.
• Assam State Road Transport Corporation – This is a bus service that is run by the state of Assam. This firm provides people with transport facility in different cities of Assam as well as to the neighboring states.
• Jharkhand State Road Transport Corporation – This bus service that is run by the state of Jharkhand.
• Manipur State Road Transport Corporation – This is a bus service that is managed by the state of Manipur.
• Metro Railway, Kolkata – The Metro Railway is considered to be one of the biggest railway networks in India.  It is also known as the Rapid transit systems. The metro railway was first started in the year 1949.
• Mizoram State Road Transport Corporation – This is a bus service that belongs to the State of Mizoram.
• Nagaland State Road Transport Corporation – This is a state owned bus service that functions within the state of Nagaland.
• North Bengal State Road Transport Corporation – This is a bus service that is run by the state of Bengal.
• Orissa State Road Transport Corporation – This is a bus service that functions within the state of Orissa.
• Sikkim State Road Transport Corporation – This is a bus service that is owned by the state of Sikkim. This firm enables people to commute within the state as well as in neighboring states.
• Tripura State Road Transport Corporation – This is state run bus service that functions within the state of Tripura.

List of Government Transport Companies in the South Zone

• A P State Road Transport Corporation - The Andhra Pradesh State Road Transport belongs to the Indian Government. This company is acknowledged as the one and corporation that possess the largest fleet of buses in the world.
• Air Sahara -This government airline was founded on the 3rd of Dec, 1993 subsequent to the launch of the Open Sky Policy of the Indian Government. Air Sahara now has a prominent place amongst the finest airline services in the country.
• Bangalore Metropolitan Transport Corporation - The Bangalore Metropolitan Transport Corporation is one of the biggest agencies of the Indian government that commands the municipal transportation bus service.
• Chennai Metro Rail Limited (CMRL) – The Chennai Metro Rail Limited is owned by the Government of India. The main purpose of the CMRL is to provide the people of Chennai with a swift and reliable mode of transport.  The CMRL has its headquarters in Chennai.
• Goa Nadu State Road Transport Corporation – This is also known as the Kadamba Bus Terminal. This firm facilitates the passengers to commute within the state.
• Karnataka State Road Transport Corporation – This is a road transportation company that belongs to the state of Karnataka. It was founded in the year 1961.
• Kerala State Road Transport Corporation – This firm is run by the Government of Kerala. It is acknowledged as one amongst the oldest public bus transport services run by the state in India.
• South Central Railway - This is one amongst the 16 railway zones in our country.  It was founded on the 2nd of October, 1966 as the ninth railway zone of the Indian railways.  The headquarters of this railway zone is located in Secunderabad.
• Tamil Nadu State Road Transport Corporation – This is the public transport bus operator of the state of Tamil Nadu. It operates buses both within and outside the routes of Tamil Nadu.

List of Government Transport Companies in the West Zone

• AIR India – This is one of the veteran airlines of India. This airline is owned by both the owned by the National Aviation Company of India Limited and the government of India. The headquarters of this airline is located in Mumbai.
• Gujarat State Road Transport Corporation – This Company is owned by the Indian government. This firm has its headquarters in Gujarat. The Corporation provides service for people both inside the state of Gujarat and other neighboring states. This is a bus service that is owned by the state of Gujarat. The GSRTC was founded on the 1st of May, 1960.
• Konkan Railways - This is a railway line that runs through Mangalore to Mumbai (all along the western coastline of India). This railway was built and is managed by the Konkan Railway Corporation.
• Maharashtra State Road Transport Corporation – This is the bus service run by the state of Maharashtra. It is acknowledged as the 3rd largest bus service provider in the country.
• BEST Public bus service: - This is transportation system is controlled by the government in Mumbai. The BEST stands for Brihanmumbai Electric Supply and Transport. The BEST included in it’s a task force single and double Decker buses. Most of the busses are Air conditioned.
• Navi Mumbai Municipal Transport: - this division function by providing the general public with Volvo buses from Navi Mumbai to Bandra,Borivali and also to Dindoshi.
• Maritime Transportation Services India - This Company functions underneath the aegis of the Ministry of shipping and the Government of India. The main aim of this company is to promote shipping in our country as to make India self reliant in transporting goods to and fro from firms across the globe. In addition to this, it is also their best interest to safeguard the maritime interest of India.
• Rajasthan State Road Transport Corporation (RSRTC) - The RSTRC has its headquarters at Jaipur. One amongst the biggest road transport companies in India, the Rajasthan State Road Transport Corporation is acknowledged as the sixth largest Government sector Road Transport Corporation in India.
• Shipping Corporation of India -This is a firm that is owned by the Indian Government. The SCI was founded on the 2nd of October 1961 by the joint venture of the Western Shipping Corporation and the Eastern Shipping Corporation. Subsequent to this, two more shipping firms also fused with the SCI in 1973 and 1986 correspondingly. This firm operates at both the national as well as international level. The SCI started with 19 vessels and it currently has 83 ships of 4.6 million metric tons DWT.
• The Central Institute of Road Transport (CIRT) -This firm was founded in the year 1967 as a joint initiative of the Indian government, the Ministry of shipping & Transport and the Association of State Road Transport Undertakings. The firm is committed to improve the competence as well as productivity of the public transport sector. CIRT presents programs in management development that covers transport operations, maintenance engineering and general management.
• Western Railways -The Western Railways was founded on the 5th of November 1951 as a result of the merger between the Bombay, Baroda & Central India Railway with the other railways of the state. The BB&CI Railway was inaugurated in the year 1855.

As seen, there are a number of transportation companies in the public sector. These companies control the transportation by road, rail, water and by air across the breadth and width of India.