A84 autoroute

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The A84 autoroute is a motorway in western France completed on 27 January 2003. The motorway connects Rennes in Brittany with Caen in Lower Normandy. It is part of the Autoroute des Estuaires from Dunkirk to Bayonne, avoiding Paris.


The motorway, 170 km long, cost a total of 650 million. It is dual-carriageway both ways on its entire course and service areas are positioned at regular intervals. It is toll free.

The motorway was built with a special road surface to allow rain water to run off quickly, but it is ineffective with snow that often falls in large quantities in winter, so snowplows are employed regularly. Motorway traffic radio 107.7 broadcasts A84 information specifically.


  • 1979: Ministerial decision to upgrade the road between Caen and Avranches to dual carriageway.
  • 1987: Decision by the CIAT to connect Caen, Rennes and Nantes by motorway ensuring the continuity of the French motorway network.
  • 1994: The connections between Caen and Avranches and Avranches and Rennes are declared of public utility.
  • 27 January 2003: Opening of the last section of the A84 except the Avranches bypass.


Map of the A84.

List of Junctions[edit]

Junction number & name Northbound exits Southbound exits
Sinnbild Autobahnkreuz.svg 24 RN 136, A711 RN 136, A711
Sinnbild Autobahnausfahrt.svg 25  RD 812, Thorigné-Fouillard RD 812, Thorigné-Fouillard
Sinnbild Autobahnausfahrt.svg 26  RD 812 (RN 12), Liffré RD 812 (RN 12), Liffré
Sinnbild Autobahnausfahrt.svg 27  RD 812 (RN 12), Liffré RD 812 (RN 12), Liffré
Sinnbild Autobahnausfahrt.svg 28  RD 794, Saint-Aubin-du-Cormier RD 794, Saint-Aubin-du-Cormier
Aire de pique-nique.png La Chaîne / La Lande
Sinnbild Autobahnausfahrt.svg 29  RN 12, Fougères RN 12, Fougères
Sinnbild Autobahnausfahrt.svg 30  RD 155, Saint-Brice-en-Corlès, Fougères RD 155, Saint-Brice-en-Corlès, Fougères
Aire de pique-nique.png Le Coglais
Sinnbild Autobahnausfahrt.svg 31  RD 102, Coglès RD 102, Coglès
Sinnbild Autobahnausfahrt.svg 32  RD 30, Saint-James RD 30, Saint-James
Aire d'autoroute - station essence.png Le Mont Saint-Michel
Sinnbild Autobahnausfahrt.svg 33  RN 176, Pontaubault, Ducey RN 176, Pontaubault, Ducey
Sinnbild Autobahnausfahrt.svg 34  RN 175, Pontaubault
Sinnbild Autobahnausfahrt.svg 35 
Sinnbild Autobahnausfahrt.svg 36  RD 911, Avranches RD 911, Avranches
Aire d'autoroute - station essence.png La Baie du Mont Saint-Michel
Sinnbild Autobahnausfahrt.svg 37  RD 924, Villedieu-les-Poêles RD 924, Villedieu-les-Poêles
Sinnbild Autobahnausfahrt.svg 38  RD 999, Villedieu-les-Poêles RD 999, Villedieu-les-Poêles
Aire d'autoroute - station essence.png La vallée de la Vire-Gouvets
Sinnbild Autobahnausfahrt.svg 39  RD 21, Tessy-sur-Vire RD 21, Tessy-sur-Vire
Sinnbild Autobahnausfahrt.svg 40  RN 174 RN 174
Sinnbild Autobahnausfahrt.svg 41  RD 53, Saint-Martin-des-Besaces RD 53, Saint-Martin-des-Besaces
Aire d'autoroute - station essence.png Saint-Jean-des-Essartiers
Sinnbild Autobahnausfahrt.svg 42  RD 577, Coulvain RD 577, Coulvain
Sinnbild Autobahnausfahrt.svg 43 Villers-Bocage  RD 30, Saint-James RD 30, Saint-James
Sinnbild Autobahnausfahrt.svg 44 Villers-Bocage Nord  RN 175, Villers-Bocage
Sinnbild Autobahnausfahrt.svg 45  RD 92, Tournay-sur-Odon RD 92, Tournay-sur-Odon
Sinnbild Autobahnausfahrt.svg 46  RD 174 (RN 175), Noyers-Bocage, Missy RD 174 (RN 175), Noyers-Bocage, Missy
Sinnbild Autobahnausfahrt.svg 47  RD 147A, Version
Sinnbild Autobahnausfahrt.svg 48  RD 30, Saint-James RD 30, Saint-James
Sinnbild Autobahnausfahrt.svg 49/9  RN 813, RN 175, Bretteville-sur-Odon, Caen RN 813, RN 175, Bretteville-sur-Odon, Caen

Future extensions[edit]

The A84 currently stops at Avranches. A dual carriageway is used as a bypass around Avranches by the west. This road cannot be upgraded to motorway standard due to its layout. A new motorway bypassing Avranches with three lanes is planned, as well as a further extension to Nantes by upgrading the RN 137, a dual carriageway between Rennes and Nantes.

External links[edit]