RATP The RATP Group also known as the Régie Autonome des Transports Parisiens (English: Autonomous Operator of Parisian Transports) is a state-owned public transport operator headquartered in Paris, France.
Formed in 1948, the group has its origins as the public transport operator for the city of Paris.
Today RATP is still responsible for most of the public transport in Paris and its surrounding Île-de-France region, including the Paris Métro, tram and bus services and part of the Réseau Express Régional (RER) network. In the Île-de-France region, RATP carries about 3 billion passengers per year.
RATP Group is currently the world's fifth largest operator in the public transport sector.