Types of passenger services

Trains are classified by their average speed.  A faster train has fewer stops ("halts") than a slower one and usually caters to long-distance travel.

Rank	Train	Description
1	Duronto Express	These are the non-stop point to point rail services (except for operational stops) introduced for the first time in 2009 . They connect the metros and major state capitals of India and are faster than Rajdhani Express. The Duronto services consists of classes of accommodation namely first AC, two-tier AC, three-tier AC, AC 3 Tier Economy, Sleeper Class, General Class.
2	Rajdhani Express	These are all air-conditioned trains linking major cities to New Delhi. The Rajdhanis have high priority and are one of the fastest trains in India, travelling at about 130 km/h (82 mph). There are only a few stops on a Rajdhani route.
3	Shatabdi Express	The Shatabdi trains are AC intercity seater-type trains for travel during day.
4	Garib Rath	Fully air conditioned trains, designed for those who cannot afford to travel in the expensive Shatabti and Rajdhani Express. Garib Rath means "Chariot of the Poor". The maximum speed is 130 km/h.
5	Jan Shatabdi	Jan Shatabdi Express are a more affordable variety of the Shatabdi Express, which has both AC and non-AC classes. The maximum speed is 130 km/h.
6	Sampark Kranti Express	Sampark Kranti Express trains are a series of trains that provide quick connectivity from a particular state to the national capital, New Delhi.
7	Superfast Express/Mail	These are trains that have an average speed greater than 55 km/h (34 mph). Tickets for these trains have an additional super-fast surcharge.
8	Express	These are the most common kind of trains in India. They have more stops than their super-fast counterparts, but they stop only at relatively important intermediate stations.
9	Passenger and Fast Passenger	These are slow trains that stop at most stations along the route and are the cheapest trains. The trains generally have unreserved seating accommodation but some night trains have sleeper, First Class and 3A compartments.
10	Suburban trains	These trains operate in the urban areas of Mumbai, Delhi, Kolkata, Chennai, Hyderabad and Pune, usually stop at all stations and have unreserved seating accommodation.
11	Metros and Monorails	These trains are designed for city transport in metro cities of India.