If you plan to drive through the Tarentaise Valley, please note that the Iseran Pass opens only in mid June.
Most direct route: take the A43 Maurienne Highway (at St. Jean de Maurienne) to Modane.
Before arriving at Modane, take the Haute Maurienne exit - Drive through Modane, then take the D 2006 to Bonneval.

A couple of tips:

For GPS users: be sure to enter the entire name of Bonneval Sur Arc since there are a number of towns named Bonneval in Savoy.
Roadway information: Tourism Office, tel. 04 79 05 95 95

In July and August.
The bus station is located at the SNCF train station exit.
The TRANSAVOIE company provides bus connections between Modane and Bonneval Sur Arc. Most of the major SNCF lines have a connection.
Information: 04 79 05 01 32 or www.altibus.com

• Hello Taxi Max: air condition vehicles, room for 6 passengers, medicalized transportation
  Tel: 06 89 90 77 49
  web: hello-taxi-max.fr
• Taxi Marius: all distances, 24-hour service
  Tel: 06 15 19 13 55 ou 04 79 83 33 20
• Haute Maurienne Taxi: train station/airport, 1 to 8 passengers
  e-mail: amb.hte.maurienne@wanadoo.fr