Route départementale française D31 (01)

Route départementale D31 (01)
Signalisation sur la D31 à Vieu-Gare. © Google Street View
Localisation
Pays	France
Département	Ain (01)
Caractéristiques actuelles
Itinéraire	Dortan - Oyonnax // Saint-Martin-du-Frêne - Artemare
Longueur	6,5 km / 39 km

Présentation

• La route départementale D31 (01), ou RD31 (01), est une route départementale de l'Ain (01) qui va de Dortan à Artemare, en deux sections complètement distinctes, séparées par la N84^D entre Oyonnax et Saint-Martin-du-Frêne.
• Elle possède de nombreuses annexes :
  • la D31^A va de Belley à Virignin.
  • la D31^B dessert Furans et Champtel.
  • la D31^C va de Chazey-Bons à Saint-Martin-de-Bavel.
  • la D31^D dessert Cuzieu. les cartes Michelin indiquent aussi une D31^D de Vieu à Don par la source du Groin.
  • la D31^E dessert En Mussignin à Virieu-le-Grand.
  • la D31^F va du col de la Cheminée à la D55^C après Ramboz.
  • la D31^G va de Dortan à Rhien (Jura).
  • la D31^H est la route du pont de Chancia à Dortan.
  • la D31^I dessert Bellignat.
  • la D31^J va de Virieu-le-Grand à Pugieu.
  • la D31^K est l’avenue du Québec à Montréal-la-Cluse.
  • la D31^L relie deux tronçons de la D31 à Valromey-sur-Séran et Artemare.
  • la D31^M correspond à la rue des Écoles et à la rue du Canal à Artemare.
  • la D31^N dessert Montréal-la-Cluse.
  • la D31^O relie la D31 à la D30^B à Valromey-sur-Séran.

Historique

Généralités

• La D31 actuelle est issue du Gc31 de Dortan au Pont de la Balme par La Cluse et Oyonnax, selon le Dictionnaire Topographique et Historique de Pommerol (1907), cité par les Archives Départementales de l'Ain.
• En 1933, son extrémités au Nord de Dortan devient la N436, son extrémité sud entre Artemare et le pont de la Balme deviennent les N504 et N504^A.
• Plus tardivement, en 1952, le tracé d'Oyonnax à Saint-Martin-du-Frêne a été nationalisé en N84^D. Preuve de l'importance de cette route, elle est doublée par une autoroute, l'A404.

Aménagements

• Elargissement à 4 voies au Nord d'Oyonnax : 1972 au Sud et 16973 au Nord, avec maintien des carrefours à niveau.
• Déviation de Dortan (5,7 km en voie express, prolongeant l'A404 jusqu'au nord de Dortan, investissement de 43 millions d'Euros) :
  • 21 10 2013 : section Arbent - Dortan-Sud (inaugurée le 25 10 2013, 1 semaine après son ouverture au trafic)
  • 16 06 2014 : section Dortan-Sud - Dortan-Nord (inaugurée officiellement le 14 06 2014)

Autour de la Route

• Région du Haut-Bugey

Tracé

Chargement de la carte...

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Légende de la carte ou du tableau
En jaune	Tracé actuel.
En vert	Ancien tracé de la D31.
En violet	Tracé absorbé par la D984D et tronc commun avec la D1084.
En gris	Ancien tracé démoli lors de la déviation de la D31.
Pour plus d'informations sur les sources cartographiques, consulter cet article.
La carte ne s'affiche pas ? Merci d'éditer l'article et de le sauvegarder sans aucune modification.

• Jura (39) - D31
  • D436 Lavancia-Epercy

• Ain (01) - D31
  • D936 Dortan
  •  A404
  • Oyonnax D13
  •  Tronc commun avec la D984^D, jusqu'à La Cluse.
  •  Tronc commun avec la D1084, entre La Cluse et Saint-Martin-du-Frêne.
  • Saint-Martin-du-Frêne D12 D1084
  • L'Orme
  • La Pérouse
  • Le Montoux D21
  •  Col de la Cheminée (925 m)
  • Jalinard
  • Le Petit-Abergement
  • Valromey-sur-Séran
    • Ruffieu
    • Lompnieu
    • Sutrieu
    • Fitignieu
    • D30
    • Don Source du Groin
  • Artemare D904

Voie Express

•  A404
  •   D106^D : Ville desservie : Arbent
•  D31
  • 
  •   D106  : Ville desservie : Bonaz
  •   ex-D31 : Ville desservie : Dortan
  • 
  •   D436 : Villes desservies : Saint-Claude, Lons-le-Saunier | Oyonnax
•  D31

Liens externes

• Plaquette de présentation de la déviation de Dortan