The motorway U 2 links the motorway B 48 to the West, to the motorway A 41 to the East. This express road serves the Southern zone of GRENOBLE, as well as the communes of EYBENS, POISAT, ECHIROLLES and SAINT-MARTIN-d'HERES.

The General Council of the Isere decided for the Olympic Games, to carry out a section 6 kms long joining the N 75 (intersection Rondeau) to the N 523 (GIÈRES road) in the form of a single roadway 10.50 metres wide, which will constitute the northern lane of the future motorway.

This express road includes two junctions and four permanent spanning constructions. During the Games, this road carried the coach traffic to and from CHAMROUSSE and ALPE-d'HUEZ as well as serving the car park and the Olympic coach station.

The cost of this work amounted to 24 million francs, of which 11 millions were paid by the government, 11 millions by the department of the Isere and 2 millions by the town of Grenoble. The work began in May 1966 and it was ready for traffic in December 1967.