Route nationale française 170

Route nationale 170
Panneau Michelin à Daoulas.© Jmlv
Localisation
Pays	France
Régions	Bretagne, Bourgogne-Franche-Comté, Île-de-France
Caractéristiques de 1824 à 1974
Itinéraire	Quimper - Châteaulin - Landerneau - Brignogan-Plages
Longueur	94 km
Caractéristiques de 1974 à 1978
Itinéraire	Quimper - Châteaulin - Brest
Longueur	76 km
Caractéristiques de 1978 à 19xx
Itinéraire	Montceau-les-Mines
Longueur	2,5 km
Caractéristiques de 1999 à 2006
Itinéraire	Argenteuil - Soisy-sous-Montmorency
Longueur	6 km

Présentation

• La route nationale 170, ou RN170, est une ancienne route nationale française qui a connu diverses affectations au cours du temps.

Historique

Généralités

• A sa création, en 1824, elle est décrite comme la route de Quimper à Lesneven et à la mer près Plounéour. Elle succède alors à la Route impériale 190.
• Dans les années 1970, cet itinéraire originel connaît plusieurs modifications :
  • La section entre Daoulas et Brignogan-Plages est déclassée en 1973 en D770.
  • A la place, on intègre en 1974 à la RN170 des sections des anciens CD33 et CD233 entre Daoulas et Brest qui permettent d'assurer un itinéraire direct entre Quimper et Brest.
  • Le nouvel itinéraire ainsi formé entre les deux plus importantes villes du Finistère est aménagé progressivement en voie express, de sorte qu'à chaque nouvelle ouverture, l'ancien tracé devient D770.
  • Finalement, en 1978, l'ensemble de la RN170 est intégré à la RN165 pour former un axe Nantes - Brest.
• Son numéro fut alors réattribué tardivement à la nomenclature de 1978 à une bretelle de la nouvelle N70 à Montceau-les-Mines, la route de Montceau-les-Mines, CD974 et 57, à Blanzy N70 (Echangeur de Blanzy).
• Puis elle devint une route de la banlieue parisienne, qui reprend une partie du projet de l'autoroute A87 (rocade intermédiaire d'Ile de France), sous le nom de "Boulevard Intercommunal du Parisis". La RN170 relie Argenteuil à Soisy-sous-Montmorency. Déclarée d'utilité publique le 17 août 1993, une première section est ouverte le 29 mars 1999 et une deuxième section le 25 janvier 2003. Le projet prévoyait un barreau de liaison performant jusqu'à la gare d'Ermont-Eaubonne qui a été abandonné lors de la définition finale du projet. L'ensemble du tracé, aménagé en voie express sur tout son parcours, fut déclassé en 2006 en D170.

Construction

• Sortie de Quimper : 1842.
• Section Quimper - Ti Dokig : 1842.
• Section Ti Dokig - Châteaulin : 1843.
• Rectification de Châteaulin : 1844.
• Section Drénit - Le Faou : 1844.
• Traversée du Faou : 1840 (réparations).
• Section Le Faou - Keromen : 1859.
• Section Keromen - Landerneau : début des années 1850.
• Traversée de Lesneven : 1838 (réparations).
• Section Brignonan - La Mer : 1840.

Aménagements

• Rocade de Landerneau : 1986 au Sud-Ouest, 1981 à l'Ouest et 28 juin 2004 au Nord-Ouest.
• Élargissement à 4 voies entre Landerneau et la RN12 à Mescoden : 2003.
• Requalification entre la RN12 à Mescoden et Ploudaniel : 8 juillet 2022.
• Déviation de Ploudaniel : 1978 au Sud-Ouest et 8 octobre 2010 au Nord-Ouest.

Tracés historiques

D'Argenteuil à Soisy-sur-Montmorency (entre 1999 et 2006)

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Légende de la carte ou du tableau
En rouge	Tracé de 1999 à 2006.
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.

La D170 à hauteur d'Eaubonne.
© France Autoroutes

• Val-d'Oise (95) - D170

Voir l'article : Route départementale française D170 (95).

Montceau-les-Mines (dans les années 1970-1980)

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Légende de la carte ou du tableau
En rouge	Tracé de 1978 à 198x.
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.

• Saône-et-Loire (71) - VC
  •  N70 Blanzy
  • Avenue du Maréchal Leclerc
  • Montceau-les-Mines Centre D57 D974

De Quimper à Brignogan-Plages (de 1824 à 1978)

Chargement de la carte...

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class=\"mw-parser-output\"\u003E\u003Cp\u003ETrac\u00e9 originel Le Faou Landerneau\n\u003C/p\u003E\u003C/div\u003E","title":"Trac\u00e9 originel Le Faou 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class=\"mw-parser-output\"\u003E\u003Cp\u003ETrac\u00e9 historique au Nord de Landerneau\n\u003C/p\u003E\u003C/div\u003E","title":"Trac\u00e9 historique au Nord de Landerneau\n","link":"","strokeColor":"#03FAEB","strokeOpacity":"1","strokeWeight":"5","pos":[{"lat":48.455319,"lon":-4.257041},{"lat":48.458948,"lon":-4.26299},{"lat":48.46042,"lon":-4.265227}]},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ETrac\u00e9 originel \u00e0 Quimper, d\u00e9class\u00e9 en 1969\n\u003C/p\u003E\u003C/div\u003E","title":"Trac\u00e9 originel \u00e0 Quimper, d\u00e9class\u00e9 en 1969\n","link":"","strokeColor":"#FFFACD","strokeOpacity":"1","strokeWeight":"5","pos":[{"lat":47.9958,"lon":-4.103006},{"lat":47.996188,"lon":-4.102904},{"lat":47.996131,"lon":-4.101826},{"lat":47.996443,"lon":-4.10063},{"lat":47.997129,"lon":-4.100432},{"lat":47.997365,"lon":-4.100094},{"lat":47.997718,"lon":-4.096838},{"lat":48.000144,"lon":-4.088866},{"lat":48.00036,"lon":-4.086742},{"lat":48.000582,"lon":-4.086055},{"lat":48.000941,"lon":-4.085626},{"lat":48.003445,"lon":-4.084078}]},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ERectification au niveau de Coat Bily\n\u003C/p\u003E\u003C/div\u003E","title":"Rectification au niveau de Coat Bily\n","link":"","strokeColor":"#FFFACD","strokeOpacity":"1","strokeWeight":"5","pos":[{"lat":48.025723,"lon":-4.086356},{"lat":48.02718,"lon":-4.086967},{"lat":48.027711,"lon":-4.086849},{"lat":48.028141,"lon":-4.086399},{"lat":48.029128,"lon":-4.083952},{"lat":48.029522,"lon":-4.08333},{"lat":48.031248,"lon":-4.081377}]},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ERectification de Ti-Koz \u00e0 Penn-ar-Prad\n\u003C/p\u003E\u003C/div\u003E","title":"Rectification de Ti-Koz \u00e0 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class=\"mw-parser-output\"\u003E\u003Cp\u003EQuimper centre (jusqu'en 1969)\n\u003C/p\u003E\u003C/div\u003E","title":"Quimper centre (jusqu'en 1969)\n","link":"","lat":47.9958,"lon":-4.103006,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EQuimper, \u00e0 partir de 1969\n\u003C/p\u003E\u003C/div\u003E","title":"Quimper, \u00e0 partir de 1969\n","link":"","lat":47.991107,"lon":-4.073481,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EBrignogan-Plages\n\u003C/p\u003E\u003C/div\u003E","title":"Brignogan-Plages\n","link":"","lat":48.669652,"lon":-4.32724,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EDaoulas\n\u003C/p\u003E\u003C/div\u003E","title":"Daoulas\n","link":"","lat":48.367042,"lon":-4.257717,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EBrest (Port de Commerce)\n\u003C/p\u003E\u003C/div\u003E","title":"Brest (Port de Commerce)\n","link":"","lat":48.386623,"lon":-4.471113,"icon":""}]}

Légende de la carte ou du tableau
En rouge	Tracé cédé à la RN165 en 1978.
En rouge clair	Tracé entre Daoulas et Brest, classé en 1974 et cédé à la RN165 en 1978.
En orange	Ancien tracé déclassé progressivement de 1971 à 1976, après mise en service de la voie express entre Quimper et Daoulas.
En jaune	Tracé originel déclassé en 1973 au Nord de Daoulas.
En jaune clair	Ancien tracé déclassé localement au XXe siècle après rectification.
En bleu ciel	Tracé originel entre Quimper et Landerneau rectifié au XIXe siècle.
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.

• Finistère (29) - D770
  • D15 D34 D39 D63 D765 D783 D785 Quimper Cathédrale, Nombreux Monuments
  • Al Loc'h  N165   54 
  • Gourvili  N165   55 
  • Park Poullig  N165   56   D100
  • Ty-Sanquer D785
  •  N165 (pas d'accès)
  • Landrévarzec Quilinen Chapelle
  • D61
  • Chapelle Saint-Vénec
  • Ruisseau du Moulin du Duc
  • Croas-ar-Born D41
  • Kerbolé
  • Châteaulin L'Aulne Chapelles, Église, Viaduc D887
  • Port-Launay  N165   61 
  • Pont-de-Buis-lès-Quimerch La Douffine
  •  Squiriou
  • Quimerc'h   D21
  •  N165 (pas d'accès)
  • Le Faou Le Faou Églises, Maisons à pans de bois D42 D47 D791
  •  N165   64  D18
  • Anse de Kérous
  • Hôpital-Camfrout
  • Goasven
  • Daoulas La Mignonne Abbaye, Nombreux Monuments...  N165   66  D33
  • D47
  • Landerneau Couvent des Capucins, Église Saint-Houardon... D29 D712 D764
  • Saint-Éloi  N12   84 
  • Ploudaniel
  • D32
  • Lesneven Cimetière Militaire Allemand, Ancient Couvent, Église XVIII^e... D110 D125 D788
  • Kergunic
  • Roudoushir Le Quillimadec
  •  
  • D10
  • Plounéour-Trez Les Quatre-Bras
  • Brignogan-Plages Menhir, Phare

Voie express

Historique

• xx xx 2003 : Section Le Roudous - Bel-Air (seconde chaussée, aménagement sur place)
• 28 06 2004 : Section Bel-Air - Saint-Eloi (2x2 voies)

Itinéraire

• Finistère (29) - D770
  •   D770 Saint-Thonan, Landerneau-Centre, Plougastel-Daoulas, Quimper
  •  D770
  •     : Villes desservies : Collège de Mescoat, Z.I. de Bel-Air (demi-échangeur)
  •     : Villes desservies : Parc d'Innovation de Mescoat, Centre d'affaires
  •  D770
  •   D770 Landerneau-Est, Quinquis-Marc, Collège de Mescoat, Gares, Prat-Guen, Gorré-Beuzit
  •  D770
  •     : Villes desservies : Loc-ar-Bruc, Petit-Saint-Eloi, Sant-Alar-Bian (demi-échangeur)
  •  D770
  •   D770 Z.A.E. Saint-Eloi, Plouedern, Ploudaniel, Lesneven, Vers  N12   84  (Guipavas, Brest | Landivisiau, Morlaix, Rennes)