Wikipedia
CDGVAL
CDGVAL (Charles de Gaulle Véhicule Automatique Léger) is a free automatic shuttle rail service at Paris-Charles de Gaulle Airport consisting of two lines: a first line which opened on 4 April 2007 and a second on 27 June 2007. Based on the VAL system and using Siemens Transportation Systems VAL 208 coaches, the first five-station line links the three airport terminals, RER and TGV stations and remote car parks within 8 minutes.
The two lines are jointly operated by Siemens and Keolis on a 24-hour basis. The 60 million annual passengers of the airport and its 85,000 employees generate an annual traffic of 10 million journeys on CDGVAL.