TER is an acronym for Transport Express Régional, a brand used by the French Railways (SNCF) to identify regional trains.

The TER 2N NG (2N for “two levels” and NG for “new generation”) is a two-level electric multiple unit (an electric multiple unit in the SNCF classification) from the Coradia Duplex type from Alstom and designed for service TER in France. The first order from SNCF, ordered by the regions, was launched in 2000, the last in 2009, for deliveries which took place from 2004 to 2010.

SNCF distinguishes between the Z 24500 series with three boxes and the Z 26500 series with four or five boxes. Each is powered by an 850 kW twin-engine bogie. The Luxembourg national railway company joined several orders from the SNCF to purchase a few examples for its network, numbered in the 2200 series.

The success encountered by the Z 23500, the first generation two-level TER, as well as the significant need for renewal of TER equipment led the SNCF and the manufacturers to define successor equipment, but of an entirely new design. Indeed, the varied requirements of regions and travelers require the development of modular equipment, more accessible to people with reduced mobility (PRM), capable of traveling at 160 km/h (compared to 140 km/h for TER 2N) thanks to a more powerful engine, to be able to cross the borders in the North-East and to be more comfortable, to ensure journeys of up to 2 hours 30 minutes. It must also offer varied passenger spaces and be subject to reinforced passive security, meeting the latest regulations in force. Alstom uses its Coradia platform to offer new equipment, a full-scale model of which was assembled in 2002 and then presented to the public and communities to validate the interior design choices.

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