Route nationale française 778

Route nationale 778
Borne de limite départementale entre Côtes d'Armor et Morbihan sur l'ex-RN778.© Google Maps
Localisation
Pays	France
Région	Bretagne
Caractéristiques de 1933 à 1973
Itinéraire	Saint-Brieuc - Meucon
Longueur	104,5 km

Présentation

• La route nationale 778, ou RN778, est une ancienne route nationale française qui reliait Saint-Brieuc à Meucon.

• Elle faisait deux troncs communs avec d'autres routes nationales : avec la RN168 (3 km) à Loudéac et avec la RN24 (6 km) à Josselin.

• Son origine était située au Nord de l'agglomération de Saint-Brieuc, au carrefour avec la RN786, en rive droite du pont du Souzain (ancien ouvrage mixte ferroviaire et routier qui a malheureusement été détruit le 27 juin 1995 alors qu'il était en cours de classement au titre des monuments historiques). Elle faisait donc partie des rares routes nationales qui avaient leur extrémité sur une route avec un plus grand numéro.

Historique

• À sa création en 1933, elle est décrite comme la route de Saint-Brieuc à Vannes par Josselin.

• Dans les Côtes-du-Nord, elle est issue du chemin de grande communication n° 3, ou Gc3 (22), pour la section comprise entre le Pont du Souzain et L'Hermitage-Lorge, et du chemin de grande communication n° 7, ou Gc7 (22), pour la section comprise entre L'Hermitage-Lorge et la limite du Morbihan. Dans le Morbihan, elle est issue du chemin de grande communication n° 38, ou Gc38 (56), pour la section comprise entre la limite des Côtes-du-Nord et Josselin, et du chemin de grande communication n° 28, ou Gc28 (56), pour la section comprise entre la RN24 à La Pointe et Meucon.

• En 1973, le tronçon Loudéac - Meucon a été déclassé en D778 dans les Côtes-du-Nord (22) et le Morbihan (56).

• En 1978, le tronçon Saint-Brieuc - Loudéac a été intégré à la nouvelle RN168.

• En 1983, suite au déclassement de la RN168, est créé un grand axe départemental dans les Côtes-du-Nord, la D700, entre Saint-Brieuc et Loudéac, mis peu à peu en voie express. L'ancien tronçon de la RN778 entre Saint-Brieuc et Malakoff a été renommé D790 par continuité.

Tracé historique

Chargement de la carte...

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class=\"mw-parser-output\"\u003E\u003Cp\u003ESaint-Brieuc (ancien pont de Souzain)\n\u003C/p\u003E\u003C/div\u003E","title":"Saint-Brieuc (ancien pont de Souzain)\n","link":"","lat":48.522795,"lon":-2.761129,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EMeucon\n\u003C/p\u003E\u003C/div\u003E","title":"Meucon\n","link":"","lat":47.72434,"lon":-2.761982,"icon":""}]}

Légende de la carte ou du tableau
En rouge	Tracé cédé à la RN168 en 1973 (déclassé en 1983).
En orange	Tracé déclassé localement après rectification.
En jaune	Tracé déclassé en 1973.
En violet	Troncs communs avec d'autres RN.
Note	La description ci-dessous concerne l'ancien tracé de la RN778. Pour voir les tronçons mis en voie express sur la D700, consulter l'article RN168.
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.

• Côtes-d'Armor (22) - D790
  •  N12 D6 D700 D712 D779 D786 Saint-Brieuc Nombreux Monuments
  • Le Gouédic
  • Ploufragan
    • Brézillet
    • Les Villes Moisan
    • Menhir (dit le Sabot)    D222
    • La Ville Plessix Allées Couvertes
    •  ZI des Châtelets
    • Le Rocher Goëland
  • Saint-Julien (Sant-Juluan-Pentevr)
    • Saint-Julien
    • Saint-Gilles
  • Plaintel (Pleneventer)
    • La Hutte
    • Tréougat
    • Malakoff D790
• Côtes-d'Armor (22) - D700
  • Plaintel (Pleneventer)
    • La Ville Gourelle
    • Plaintel
  • Ruisseau de Saint-Germain
  • Saint-Brandan (Sant-Vedan)
    • Lanvia
    • Le Mérutel
    • Le Coudray
    • La Jaunaye
  •  Forêt de Lorge
• Côtes-d'Armor (22) - D76
  • Plœuc-l'Hermitage
    • L'Hermitage-Lorge Château, Église D7
    • Le Paly
    • Le Pont de la Planche
    • Les Forges
    •  Forêt de la Perche
    • Le Carabinier
  • Uzel Le Tourlanguin
  • Ruisseau de Rozan
• Côtes-d'Armor (22) - D700
  • Grâce-Uzel (Gras-Uzel) La Place à l'Épine
  • Trévé Le Bois d'Uzel
  • Loudéac (Lodoag)
    • Belle-Joie
    • La Fourchette D768
    •  Tronc commun avec la D700.
    • Loudéac Église, Chapelles D41  N164 (ex-N164^Bis)
• Côtes-d'Armor (22) - D778
  • Loudéac (Lodoag)
    • Mon Caprice
    • Le Bas Caingan
    • D700
    • Ruisseau de la Bellière
  • Saint-Barnabé
    • Le Larhon
    • La Fourchette
  • La Chèze (Kaez)
    • La Valiette
    • La Chèze Château (Ruines) Le Lié
    • La Ville Agan
  • Saint-Étienne-du-Gué-de-l'Isle
    • La Fosse
    • Saint-Étienne-du-Gué-de-l'Isle Château, Église
    • Le Guindard
    • Gas de Bois
    • Le Petit Keranna
    • Les Roches Morel
    • Le Penneret
  • Le Cambout Bel-Air
• Morbihan (56) - D778
  • Les Forges (Ar Govelioù)
    • Haut-Bodine
    • Le Lié
    • Étang des Forges
    • Bas-Bodine
    • Le Lié
    • Les Forges Forges, Château
    • Les Boulas
  • Lanouée (Lannoez)
    • La Croix-Rouge
    • Les Buttes-de-Couessou
    • La Croix-Blanche
    • La Bagatelle
    • La Ville Aubert
    • Le Moulin Tan
  • Josselin (Josilin) Château des Rohan, Basilique, Centre Ancien  N24 - D724 D793
  •  Tronc commun avec la D724.
  •  N24 D724 Guégon La Pointe
  • Guéhenno (Gwezhennoù)
    • La Ville-Pierre
    • Guéhenno Église Saint-Pierre-et-Saint-Jean-Baptiste, Chapelles, Calvaire Le Sedon
  • Billio Kerhello
  • Le Lay
  • Saint-Jean-Brévelay
    • Kerguen Chêne du Pouldu
    • Grésillon
    • Kemper
    • Talrun
    • Saint-Jean-Brévelay Église, Chapelles, Mégalithes
    • Labatte
    • La Grande Forêt
    • La Claie
    • Kerarmel
    • Le Moustoir
    • Park Chican
    • Le Château
  • Plaudren
    • Guernevé
    • Le Guern Le Loc'h
  • Locqueltas
    • Morboulo
    • Le Rest
    • Boterbo
    • Park Carré
  • Meucon Église, Calvaire  D767