Route nationale française 203

Route nationale 203
Plaque de cocher de la RN203© Laurent du Doubs
Localisation
Pays	France
Région	Auvergne-Rhône-Alpes
Caractéristiques de 1860 à 1973
Itinéraire	Annecy - Bonneville - Thonon-les-Bains
Longueur	76 km
Caractéristiques de 1973 à 2006
Itinéraire	Annecy - Bonneville
Longueur	33 km

Présentation

• La route nationale 203, ou RN203, est une ancienne route nationale française qui a connu différents parcours.

Historique

Généralités

• Elle est créée par le décret impérial daté du 18 août 1860 qui définit la route d'Annecy à Thonon par Bonneville. Son tracé s'est raccourci progressivement au fil du temps jusqu'à disparaître complètement en 2006.
• A l'origine, la N203 reliait donc Annecy à Thonon-les-Bains, via Bonneville.
• Suite à la réforme de 1972, son tracé a été démantelé et renuméroté de la façon suivante :
  • N203 d'Annecy à Bonneville, actuelle D1203.
  • N205 de Bonneville à Findrol, actuelle D1205.
  • D903 de Findrol à Rosses.
  • N206 de Rosses à Machilly, actuelle D1206.
  • D903 de Machilly à Thonon-les-Bains.
• Elle devient alors la route d'Annecy, N. 201, à Bonneville, N. 205.
• Enfin, en 2005, le tronçon subsistant, entre Annecy et Bonneville, a été déclassé à son tour en D1203. Le même processus a concerné les routes nationales issues du démantèlement de la RN203 en 1973.
• On notera que la RN203 comptait deux antennes, les RN203^A et RN203^B.

Construction

• Section Même - La Roche-sur-Foron : avril 1870.
• Pont de Bonneville : 1865.
• Section Bonneville - Findrol : 1872 (11 rectifications partielles), traversée de Contamine-sur-Arve en 1875.
• Section La Coulaz - Bonne : 1890, y compris la reconstruction du pont de Bonne.
• Section Bonne - La Bergue : 1877.
• Section La Bergue - Torrent de la Chandouze : 1890.

Aménagements

• Déviation du Plot : 1976.
• Rectification à l'Ouest et suppression du passage à niveau de La Roche-sur-Foron : 1949.
• Déviation de La Roche-sur-Foron : 1984.

Futur

• Dans le cadre de la création d'une liaison de désenclavement du Chablais (ex-A400), il est prévu d'aménager une voie express entre Nangy et Thonon-les-Bains.
• L'ancien itinéraire de la RN203 entre Nangy et Rosses sera modernisé avec un doublement intégral et une dénivellation des échanges. Le carrefour des Chasseurs sera quant à lui réorienté.

Tracés historiques

Chargement de la carte...

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class=\"mw-parser-output\"\u003E\u003Cp\u003EThonon-les-Bains\n\u003C/p\u003E\u003C/div\u003E","title":"Thonon-les-Bains\n","link":"","lat":46.36809,"lon":6.478608,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EBonneville\n\u003C/p\u003E\u003C/div\u003E","title":"Bonneville\n","link":"","lat":46.075553,"lon":6.405587,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EAnnecy\n\u003C/p\u003E\u003C/div\u003E","title":"Annecy\n","link":"","lat":45.933319,"lon":6.128333,"icon":""}]}

Légende de la carte ou du tableau
En rouge	Tracé déclassé en 2006.
En jaune	Tracé déclassé ou attribué à d'autres routes nationales 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.

Annecy - Bonneville (avant 2006)

• Haute-Savoie (74) - D1203
  • D908^B D1201 D2201 D3508 Annecy Nombreux Monuments
  • Pringy D2203
  • Argonay D916
  • Mercier D14
  • Charvonnex
  • Les Tavernettes
  • Le Plot La Daudens D2 D2^D
  • Daudens
  • Les Sapins (Anc^t Pacot) D5
  •  Col d'Evires (801 m) D27
  • Eteaux D5
  • La Roche-sur-Foron Le Sion Cité Médiévale, Château    A41   19  D2 D2^A D2^B D27 D903
  • Amancy D2^B D6
  • Vozerier D6
  • Passeirier
  • Toisinges
  • Bonneville L'Arve Châteaux  A40   16  D6 D12 D19 D27 D1205

Bonneville - Thonon-les-Bains (avant 1973)

• Haute-Savoie (74) - D1205
  • Bonneville L'Arve Châteaux D6 D12 D19 D27 D1203 D1205
  • La Côte-d'Hyot D12
  • Perrine
  • Contamine-sur-Avre
  • Findrol  A40   15  D9 D903 D1205
• Haute-Savoie (74) - D903
  • Bonne Le Foron D907
  • La Bergue D907
  • Rosses D1206
• Haute-Savoie (74) - D1206
  • Saint-Cergues D15
  • Machilly D15 D1206

Panneau Michelin à l'entrée de Lully. © jmlv

• Haute-Savoie (74) - D903
  • Langin
  • Bons-en-Chablais D20
  • Brenthonne
  • Lully
  • D25
  • Perrignier
  • Mesinges
  •  D1005   4 
  • Thonon-les-Bains Châteaux D12 D26 D32 D902 D2005

Voie express

Rocade Nord d'Annecy

Historique

Voir l'article : Rocade d'Annecy.

Itinéraire

• Haute-Savoie (74) - D1203
  •   Argonay
  •  D1203
  •     D916 Thônes, La Clusaz, Megève
  •     D2203 Le Pont-de-Brogny, Annecy (demi-échangeur)
  •     A41 D1201 D2201 Pringy, Annecy (trois-quarts-échangeur)
  •   Échangeur entre D3508 et D1203 (demi-échangeur)
  •  D1203
  •  D3508

Nangy - Rosses

Historique

• xx xx 1984 : Déviation de Findrol
• xx xx 1987 : Diffuseur des Chasseurs
• xx xx 1993 : Déviation de Bonne
• xx xx 1995 : Déviation de La Bergue

Itinéraire

• Haute-Savoie (74) - D903
  •  D903
  •      A40   15 
  •     D1205 Findrol, Nangy, Pouilly (demi-échangeur)
  •     Findrol, Boëge (demi-échangeur)
  •  D903
  • Aménagement en projet
  •  D903
  •     Bonne (demi-échangeur)
  •     D907 Bonne, La Bergue, Cranves-Salles, Annemasse
  •     La Bergue, Lucinges
  •     La Bergue (quart-échangeur)
  •  D903
  • Aménagement en projet
  •  D1206

Pictogrammes utilisés dans la description
	Sortie d'une voie non autoroutière.		Rocade / Périphérique.
	Sortie d'une autoroute ou voie express à péage en service.		Pont.
	Sortie d'une autoroute ou voie express gratuite en service.		Tunnel.
	Sortie en construction.		Aire de repos.
	Sortie fermée.		Aire de service.
	Échangeur entre 2 voies non autoroutières ou non express.		Radar automatique.
	Échangeur entre 2 autoroutes ou voies express à péage en service.		Gare.
	Échangeur entre 2 autoroutes ou voies express gratuites en service.		Aéroport.
	Échangeur entre une autoroute (ou voie express) à péage en service et une autoroute (ou voie express) gratuite en service.		Col.
	Échangeur entre une autoroute (ou voie express) à péage en service et une autoroute (ou voie express) en construction.		Vitesse maximale autorisée.
	Échangeur entre une autoroute (ou voie express) gratuite et une autoroute (ou voie express) en construction.		Pente dangereuse.
	Début d'une autoroute.		Route à double sens.
	Fin d'une autoroute.		Feux tricolores.
	Début d'une voie express.		Carrefour giratoire.
	Fin d'une voie express.		Route prioritaire.
	Créneau de dépassement à 2x2 voies hors voie express.		Route prioritaire ponctuellement.
	Créneau de dépassement à 3 voies.		Limites de départements et/ou de régions.

Sites Sara

• La D903 (74) sur Saratlas
• La D1203 (74) sur Saratlas

Liens externes

• Site sur le désenclavement du Chablais