Route nationale française 685

Route nationale 685
Flèches Michelin en place à Artonne.© Dg67
Localisation
Pays	France
Région	Auvergne-Rhône-Alpes
Caractéristiques de 1933 à 1973
Itinéraire	Riom - Saint-Bonnet // Beauregard - Aigueperse
Longueur	19,5 km hors tronc commun

Présentation

• La route nationale 685, ou RN685, est une ancienne route nationale française, au parcours torturé, qui reliait Riom à Aigueperse via Châtel-Guyon.

Historique

• A sa création, en 1933, elle est définie comme la route d'Aigueperse à Riom par Châtelguyon.
• Entièrement située dans le Puy-de-Dôme, elle est issue successivement :
  • du chemin vicinal de grande communication n° 23, ou Gc23 (63), pour la section comprise entre Aigueperse et Saint-Myon ;
  • du chemin vicinal d'intérêt commun n° 15, ou Ic15 (63), pour la section comprise entre Saint-Myon et la RN143 à Davayat ;
  • du chemin vicinal d'intérêt commun n° 15 embranchement, ou Ic15^Et (63), pour la section comprise entre la RN143 à Saint-Bonnet-près-Riom et la Croix des Fouasses à Yssac-la-Tourette ;
  • du chemin vicinal d'intérêt commun n° 15, ou Ic15 (63), pour la section comprise entre la Croix des Fouasses et Chatel-Guyon ;
  • d'un court tronçon du chemin vicinal d'intérêt commun n° 17 embranchement, ou Ic17^Et (63), au droit de Chatel-Guyon (actuelle avenue Étienne Clémentel) ;
  • du chemin vicinal d'intérêt commun n° 78, ou Ic78 (63), pour la section comprise entre Chatel-Guyon et Riom.
• Son tracé aux abords de Riom est modifié dès le 31 mai 1935, avec le classement d'une déviation de l'ancien chemin vicinal d'intérêt commun n° 78 et le déclassement du tracé originel qui passait par l'actuelle rue des Chaumettes.
• Il est à noter que cette route apparaît en tracé blanc et très étroit (ni itinéraire principal, ni même secondaire) sur les cartes Michelin des années 1940, à l'exception de la boucle qui dessert Châtelguyon, soulignant son peu d'importance. De nos jours il en est de même...
• Le même trajet (Riom - Aigueperse) pouvait également être fait sur tracé rectiligne par la N9 en beaucoup moins de kilomètres, ce qui explique pourquoi la N685 fut logiquement déclassée en 1973.
• La section entre Châtelguyon et Riom a finalement été intégrée à la D227 en 2006.

Autour de la route

• Parc naturel régional des Volcans d'Auvergne.

Tracé historique

Chargement de la carte...

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Légende de la carte ou du tableau
En rouge	Tracé déclassé en 1973.
En jaune	Tracé originel à Riom déclassé le 31 mai 1935.
En violet	Tronc commun avec la RN144 (ex-RN143).
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.

• Puy-de-Dôme (63) - D227
  • Riom Centre Ancien, Basilique, Église, Sainte-Chapelle, etc.
    • D78 D211 D224 D455 D986 D2029 D2144 Riom Centre
    • Saint-Don D446
  • Châtel-Guyon La Vouée   D227
• Puy-de-Dôme (63) - D985^B
  • Châtel-Guyon Gare, Théâtre, Église, Thermes, etc.
    • La Mouniaude
    • Le Sardon
    • Châtel-Guyon Centre  
    • D15 D78
    • La Bramayre   D227
• Puy-de-Dôme (63) - D985
  • Yssac-la-Tourette D15
  • Saint-Bonnet-près-Riom Église XII-XVI-XIX^e D2144 (ex-N143)
  •  Court tronc commun avec la N143 ex-N144 ex-D2144.
  • Beauregard-Vendon
    • D2144 Beauregard
    • Chaptes
  • Saint-Myon
    • La Vernède
    • La Tour Vidl
    • Saint-Myon Village D223
  • Artonne Église, Fontaines, Château
    • Artonne Village (vers D15 via D22)
    • Croix Rouge
    • Bicon
  • Aigueperse Sainte-Chapelle XV^e, Église XII-XIII^e D12 D984 D2009 D2019