Grenoble can be accessed by air from Grenoble-Isère Airport, Lyon Saint-Exupéry Airport and Geneva International Airport. Within Grenoble, there is a comprehensive bus and tram service that operates 26 bus routes and four tram lines and serves much of greater Grenoble. Being essentially flat, Grenoble is a bicycle-friendly city.
The Gare de Grenoble is served by the TGV rail network, with frequent high-speed services to and from Paris-Gare de Lyon, often with a stop at Lyon Saint - Exupéry Airport: - though Grenoble is a long way from any high-speed lines, the ability of the TGVs to run on the classic network enables such connections to be provided. There are also less frequent long distance trains to and from other destinations in France, such as Lille Europe and Nantes.Local rail services connect Grenoble with Lyon, Geneva, and destinations to the east. Valence to the west provides connections with TGV services along the Rhone valley. Rail and road connections to the south are less well-developed.
Highways link Grenoble to all major cities in the area including the A48 autoroute to the northwest toward Lyon, the A49 to the southwest toward the Rhone valley via Valence, the A41 to the northeast toward Chambéry, the Alps and Italy.
A partial ring road around the south of the city, the Rocade Sud, connects the motorway arriving from the northwest (A48) with that arriving from the northeast (A41). A project to complete the ring road has been studied, with a tunnel under the Bastille as part of the likely routes, but has been rejected after its environmental studies
