Airports

Indira Gandhi International Airport (IGI) serves Delhi for both domestic and international connections, and is situated in the southwestern corner of the city, alongside Delhi-Gurgaon Expressway. In the year 2006-2007, IGI recorded a traffic of 20.44 million passengers. It is currently the busiest airport in South Asia.[24] It operates two terminals — Terminal 1 for domestic and Terminal 2 for international air travel.

The airport is witnessing massive expansion and modernisation by a consortium led by GMR. The airport will get a new integrated Terminal 3 by 2010. Terminals 4, 5 and 6 will be built in a phased manner. By 2024, airport will have four runways and will handle more than 100 million passengers per year, which is more than what Atlanta airport (world's busiest airport) handles now[25].

Apart from the expanded IGI airport, Delhi might also receive a second airport by 2012-2013. The airport, being named as Taj International Aviation Hub, is proposed be located in Jewar in Greater Noida. It would be 75 km from IGI airport.

Rail transport

Rail based transport in the city has started to gain-popularity with the introduction of Delhi Metro. Ring-Railway, which runs parallel to the Ring-Road system is another rail-based intra-city transport facility in Delhi.

Metro

Rapid increase of population coupled with large-scale immigration due to high economic growth has resulted in ever increasing demand for better transport, putting excessive pressure on the city's existent transport infrastructure. Like many other cities in the developing world, the city faces acute transport management problems leading to air pollution, congestion and resultant loss of productivity. In order to meet the transportation demand in Delhi, the State and Union government started the construction of an ambitious Mass Rapid Transit system, known as [5] Delhi Metro in 1998. The project started commercial operations on December 24, 2002. It has set many performance and efficiency standards ever since and is continuously expanding at a very rapid pace. As of 2010, the metro operates 5 lines with a total length of 111 km[15] and 98 stations[16] while several other lines are under construction.

Buses

Delhi has one of India's largest bus transport systems. Buses are the most popular means of transport catering to about 60% of Delhi's total demand.[8] Buses are operated by the state-owned Delhi Transport Corporation (DTC), which owns largest fleet of Compressed Natural Gas (CNG)-fueled buses in the world, private Blueline bus operators and several chartered bus operators. It is mandatory for all private bus operators to acquire a permit from the State Transport Authority. The buses traverse various well-defined intra-city routes. Other than regular routes, buses also travel on Railway Special routes; Metro Feeder routes. Mudrika (Ring) and Bahri Mudrika (Outer Ring) routes along Ring and Outer-Ring road respectively are amongst the longest intra-city bus routes in the world.

With the introduction of Bus Rapid Transit (BRT) and the development of dedicated corridors for the service, bus service is set to improve. The DTC has started introducing air-conditioned buses and brand new low-floor buses (with floor height of 400 mm and even higher on one third area as against 230 mm available internationally.) on city streets to replace the conventional buses. A revamp plan is underway to improve bus-shelters in the city and to integrate GPS systems in DTC buses and bus stops so as to provide reliable information about bus arrivals.

In 2007, after public uproar concerning the large number of accidents caused by privately-owned Blueline buses, the Delhi government, under pressure from the Delhi High Court decided that all Blueline Buses shall be phased out and be eventually replaced by low floor buses of the state-owned DTC.[9] The Delhi Government has decided to expedite this process and will procure 6,600 low floor buses for the DTC by commonwealth games next year.[10]

By 2010, Delhi will have over 8000 buses, of which Delhi Transport Corporation will provide 6000 while 2000 would be blueline buses, 3125 will be low-floor ,1100 semi low floor and 1000 of them would be air-conditioned. Few buses would have GPS to prevent them from straying to other routes. The city already has 655 low-floor AC and non-AC buses. The bus routes are also being increased to 670 from the current 357 routes. Delhi plans to add at least 2500 of these new buses by the end of 2009.[11] The city has been divided into 17 clusters. Bus services in each of these clusters will be run by private operators. The first cluster is to be awarded by September 2008. The first cluster has 32 routes, on which a total of 295 DTC and 270 private buses will run. The operators will be given the option of running 20 percent AC buses[12] With the introduction of new buses, DTC will be recruiting 4000 drivers to run the new buses.

Taxis

Recently, Radio Taxis have started to gain ground in Delhi. Brands such as Mega Cabs, EasyCabs, etc., provide the on-call radio taxi service, which is slightly more expensive than conventional Black and Yellow taxis. Other than these two mentioned, companies such as Hertz Car Rental and Avis Car Rental provide rent-a-car service.