A monorail is a railway in which the track consists of a single rail or a beam. The term is also used to describe the beam of the system, or the trains traveling on such a beam or track. The term originates from joining "mono" (meaning one) and "rail" from 1897.

Monorails have found applications in airport transfer and medium capacity metros. To differentiate monorails from other transport modes, the Monorail Society defines a monorail as a "single rail serving as a track for passenger or freight vehicles. In most cases rail is elevated, but monorails can also run at grade, below grade or in subway tunnels. Vehicles either are suspended from or straddle a narrow guide way. Monorail vehicles are wider than the guide way that supports them.

FREIGHT TRAINS 

A freight train, cargo train, or goods train is a group of freight cars (US) or goods wagons (International Union of Railways) hauled by one or more locomotives on a railway, transporting cargo all or some of the way between the shipper and the intended destination as part of the logistics chain. Trains may haul bulk material, intermodal containers, general freight or specialized freight in purpose-designed cars. Rail freight practices and economics vary by country and region.

    INTER CITY RAIL 

Inter-city rail services are express passenger train services that cover longer distances than commuter or regional trains.

There is no precise definition of inter-city rail; its meaning may vary from country to country. Most broadly, it can include any rail services that are neither short-distance commuter rail  trains within one city area, nor slow regional rail trains calling at all stations and covering local journeys only. Most typically, an inter-city train is an express train with limited stops and comfortable carriages to serve long-distance travel.

Inter-city rail sometimes provides international services. This is most prevalent in Europe, due to the close proximity of its 50 countries in a 10,180,000 square kilometer (3,930,000 sq mi) area. Eurostar and EuroCity are examples of this. In many European countries the word "InterCity" or "Inter-City" is an official brand name for a network of regular-interval, relatively long-distance train services that meet certain criteria of speed and comfort. This use of the term appeared in the United Kingdom in the 1960s and has been widely imitated.