Transport express régional (French pronunciation: [tʁɑ̃spɔʁ ɛksprɛs ʁeʒjɔnal], usually shortened to TER) is the brand name used by the SNCF, the French national railway company, to denote rail service run by the regional councils of France, specifically their organised transport authorities. The network serves twenty French regions; Île-de-France and Corsica have their own specific transport systems. Every day, over 800,000 passengers are carried on 5,700 TER-branded trains.
TER is an integral part of SNCF Proximités, a branch of the SNCF dealing with urban and regional passenger rail, along with Transilien (Île-de-France), Intercités, Chemins de Fer de la Corse (CFC), Keolis, and Effia.
The French railway system is planned and constructed by the French National Railway Agency (Socicte Nationalc des Chemins de Fer Francais, abbreviated as SNCF). The route is centered on Paris and woven in all directions, including high-speed trains (Train a Grande Vitesse, abbreviated as TGV). Routes, and general train routes that go to cities and towns. Among these general train routes, the nationwide inter-regional route is called the "Grande Ligne" (GL for short), and the routes that only travel within a single area are collectively called "Regional Rapid Transport System" (Transports Express Regionaux, referred to as TER).