Route nationale française 84

Route nationale 84
Beau panneau Michelin de la RN84 à Port (01)© Didier S.
Localisation
Pays	France
Région	Auvergne-Rhône-Alpes
Caractéristiques de 1824 à 1843
Itinéraire	Meximieux - Ambérieu-en-Bugey - Nantua - Genève
Longueur	107 km
Caractéristiques de 1843 à 1973
Itinéraire	Crépieux-la-Pape - Ambérieu-en-Bugey - Nantua - Genève
Longueur	131 km
Caractéristiques de 1973 à 2006
Itinéraire	Neyron - Saint-Denis-en-Bugey // Pont-d'Ain - Bellegarde-sur-Valserine
Longueur	44,5 km + 62 km

Présentation

• La route nationale 84, ou RN84, est une ancienne route nationale française qui reliait Lyon à Genève.
• Elle se composait de deux parties : la première de Neyron à Dagneux et jusqu'à Ambérieu-en-Bugey, et la deuxième de Pont-d'Ain à Bellegarde-sur-Valserine. Dans la première partie, elle traverse l'Est de l'agglomération Lyonnaise jusqu'à Dagneux pour regagner la campagne à partir de La Valbonne (commune de Balan), excepté à l'approche de Meximieux ou d'Ambérieu-en-Bugey. Il s'agit ici d'une route de plaine. A partir de Pont-d'Ain, la route se faufile à travers les montagnes du Cerdon et traverse un milieu plutôt rural excepté les communes de Nantua et de Bellegarde-sur-Valserine marquant la fin de cette route.

Historique

Généralités

• A sa création, en 1824, elle est décrite comme étant la route de Lyon à Génève. Elle s'embranche à Meximieux sur la route précédente, n°83. Elle succède alors à la Route impériale 102.
• Par ordonnance royale du 25/08/1843, la RN83 est rectifiée entre Lapape et Monternaud, de sorte que la RN84 atteint désormais Lyon.
• En 1973, elle fut réduite aux portions Neyron - Meximieux et Neuville-sur-Ain - Bellegarde-sur-Valserine auxquelles on adjoignit le tronçon Meximieux - Saint-Denis-en-Bugey repris sur la N84^A et le tronçon Pont-d'Ain - Neuville-sur-Ain par la rive gauche de l'Ain construit en site propre. Le tracé de Bellegarde à Collonges fut quant à lui attribué à la N206.
• Elle devient donc en 1978 la route de Rillieux-la-Pape, N. 83, à Bellegarde, N. 206.
• La RN84 possédait quatre antennes, la N84^A, la N84^B, la N84^C et la N84^D.
• La route fut entièrement déclassée en 2006, mouvement précédé par un déclassement partiel en 1990 dans l'agglomération lyonnaise.

Aménagements

• Déviation de Meximieux : section Sud-Ouest en 1981, section Sud-Est en 2002 (assurant la continuité de la D1084 avec emprunt de routes existantes), barreau Est de jonction à la D984 le 4 décembre 2003.
• Déviation d'Ambérieu-en-Bugey : 1974 (commune avec la D1075).
• Déviation de Coutelieu : 25 août 2014.
• Déviation de Pont-d'Ain : 1979 (avec emprunt de routes existantes).
• Déviation de Tacon : 1973.
• Voie express entre Collonges et Saint-Genis-Pouilly : voir l'article sur la D884.

Tracés historiques

Chargement de la carte...

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class=\"mw-parser-output\"\u003E\u003Cp\u003E(A) Cr\u00e9pieux-la-Pape\n\u003C/p\u003E\u003C/div\u003E","title":"(A) Cr\u00e9pieux-la-Pape\n","link":"","lat":45.802957,"lon":4.880848,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EA46\n\u003C/p\u003E\u003C/div\u003E","title":"A46\n","link":"","lat":45.808162,"lon":4.919257,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ENeuville-sur-Ain\n\u003C/p\u003E\u003C/div\u003E","title":"Neuville-sur-Ain\n","link":"","lat":46.079601,"lon":5.383387,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E(B) Meximieux\n\u003C/p\u003E\u003C/div\u003E","title":"(B) Meximieux\n","link":"","lat":45.898491,"lon":5.185976,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ESaint-Denis-en-Bugey\n\u003C/p\u003E\u003C/div\u003E","title":"Saint-Denis-en-Bugey\n","link":"","lat":45.948046,"lon":5.319786,"icon":""},{"text":"\u003Cdiv 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Légende de la carte ou du tableau
En rouge	Tracé déclassé en 2006.
En jaune	Tracé déclassé en 1973.
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.

Entre A et B : section prise à la RN83 en 1843.

De Crépieux-la-Pape à Meximieux (de 1843 à 2006, sauf Crépieux - Neyron déclassé avant 2006)

• Métropole de Lyon (69M) - D484
  • D483 Crépieux-la-Pape
• Ain (01) - D1084
  • Neyron
  • Miribel
  • Saint-Maurice-de-Beynost
  • Beynost D1084^A
  • La Boisse
  • Montluel Église XV-XVI^e D2 D22 D61
  • Dagneux  A42   6 
  • La Valbonne
  •  Pérouges Le Longevent Cité Médiévale
  • Meximieux D4 D22^A D65 D1084

De Meximieux à Saint-Denis-en-Bugey (de 1973 à 2006)

• Ain (01) - D1084
• repris sur la N84^A
  • L'Ain
  • Les Brosses
  • Leyment
  • Saint-Denis-en-Bugey D1075

De Meximieux à Pont-d'Ain (de 1824 à 1973)

• Ain (01) - D984
  • Chavagnieux
  • Villieu-Loyes-Mollon Villieu
  • Villieu-Loyes-Mollon Mollon
  • Gévrieux D904
  • Bublanne
  • Villette
  • Priay Château de Richemont D12
  • Varambon
  • Pont-d'Ain Château  A42   9  D1075

De Pont-d'Ain à Bellegarde-sur-Valserine (de 1824 à 2006)

• Ain (01) - D1084 sur la rive gauche jusqu'à Neuville-sur-Ain entre 1973 et 2006.
• Ain (01) - D984 sur la rive droite jusqu'à Neuville-sur-Ain avant 1973.
• Ain (01) - D1084
  • Neuville-sur-Ain L'Ain D42
  • La Route D36
  • Poncin
  • Leymiat
  • Cerdon D11
  • Labalme Grottes du Cerdon
  • Ceignes
  • Maillat L'Oignin
  • Saint-Martin-du-Frêne Tour D12 D31
  • Port
  • Montréal-La Cluse Lac de Nantua D979 D984^D
  • Nantua
  • Les Neyrolles
  •  A40   9 
  • Lac de Sylans
  • Gorges
  • Saint-Germain-de-Joux La Voûte D55
  • Tacon
  • Trébillet D14
  • Châtillon-de-Michaille D991
  • Pertes de la Valserine
  • Bellegarde-sur-Valserine La Valserine D101 D991 D1508

De Bellegarde à Genève (de 1824 à 1973)

Borne impériale à Bellegarde-sur-Valserine
© Lloyd_cf

• Ain (01) - D1206
  • Léaz
  • Longeray
  • Défilé de l'Écluse Fort de l'Écluse
  • Collonges D984^B D1206
• Ain (01) - D984
  • Farges
  • Logras
  • Péron
  • D89
• Ain (01) - D884
  • Saint-Jean-de-Gonville Sous-Saint-Jean
• Ain (01) - D984^F
  • Saint-Genis-Pouilly D35 D884 D984^C
•  -   Frontière entre France et Suisse.
• Genève (GE) - 101
  • Meyrin

Voie express

• Il existe une voie express parallèle à l'ancien tracé de la N84 entre Collonges et Saint-Genis-Pouilly en site propre. Elle n'a jamais été nommée RN84 mais toujours D884, car sa construction est intervenue après le déclassement de 1973.

Voir l'article : Route départementale française D884 (01).

Sites Sara

• La D884 (01) sur Saratlas