Route nationale française 525

Route nationale 525
Vieux panneau en tôle à l'entrée de Roselend.© Inconnu
Localisation
Pays	France
Région	Auvergne-Rhône-Alpes
Caractéristiques de 1933 à 1960
Itinéraire	Goncelin - Roselend
Longueur	87,5 km
Caractéristiques de 1960 à 1970
Itinéraire	Goncelin - Barrage de Roselend
Longueur	83,8 km
Caractéristiques de 1970 à 1973
Itinéraire	Goncelin - Col de Méraillet
Longueur	87,1 km

Présentation

• La route nationale 525, ou RN525, est une ancienne route nationale française qui reliait Goncelin à Roselend.

Historique

Généralités

• À l'origine, en 1933, elle est définie comme la route de Grenoble à Roselend par Allevard et Albertville.
• En Isère, elle est issue du chemin de grande communication n° 77, ou Gc77 (38). En Savoie, elle est issue d'un court tronçon de la route départementale n° 14, ou RD14 (73), pour la section comprise entre la limite de l'Isère et le lieu-dit Les Granges à Détrier, d'un premier tronçon de la route départementale n° 9, ou RD9 (73), entre Les Granges et le carrefour de Saint-Clair à la limite entre Détrier et La Rochette, de la route départementale n° 4, ou RD4 (73), pour la desserte du centre de La Rochette, entre le carrefour de Saint-Clair et celui des Rubattes, d'un second tronçon de la route départementale n° 9, ou RD9 (73), entre Les Rubattes et Beaufort, et du chemin de grande communication n° 17, ou Gc17 (73), entre Beaufort et Roselend.
• La trajet de Grenoble à Goncelin se faisait alors via la N523.
• On notera que la RN525 possédait 2 annexes : les RN525^A et RN525^B.
• La RN525 aurait dû rejoindre la Route des Grandes Alpes (RN202) au sommet du Cormet de Roselend mais cette dernière est restée inachevée.
• Jusqu'à la construction du barrage de Roselend en 1960, la RN525 s'arrêtait donc à l'entrée du village d'alpage qui a donné son nom à l'ouvrage. Elle était prolongée jusqu'au Cormet par le Gc17, devenu plus tard D217.
• La mise en eau du barrage entraîne l'engloutissement du village et des derniers kilomètres de la nationale. Pour rejoindre le Cormet de Roselend, une nouvelle route est construite au Nord du lac à la fin des années 1950. Elle monte depuis Beaufort en passant par le Col de Méraillet (1.605 m). Bien que construite par l’État, cette route nouvelle n'a pas immédiatement le statut de nationale, probablement par suite d'un oubli administratif, ce qui provoque un certain trouble dans la cartographie. On la retrouve ainsi numérotée D217 sur les cartes Michelin 74 des années 1960 à 1972 alors qu'elle porte le numéro N525 sur la carte IGN au 1:50.000e de 1957. En fait, elle n'a été classée officiellement que le 8 avril 1970.
• Suite à la réforme de 1972, la RN525 a été déclassée en D525 en Isère (38) et en D925 en Savoie (73). Le Conseil Général de Savoie profite du déclassement pour renuméroter en D925 l'ensemble de l'itinéraire jusqu'au sommet du Cormet de Roselend (1.968 m d'altitude), y compris la D217.

Aménagements

• Déviation de Saint-Pierre-d'Allevard : 1980.
• Évitement du Bassin du Flumet : 1974.
• Déviation d'Allevard : 1975 au Sud-Ouest et 1981-1982 au Nord-Ouest.
• Viabilisation entre Beaufort et Roselend : 1886.
• Construction entre Roselend et le Cormet de Roselend : années 1930, en 3 étapes.
• Évitement du barrage de Roselend : 1956.

Autour de la route

• Massif de Belledonne.
• Albertville et la cité médiévale de Conflans.
• Beaufort et le massif du Beaufortain

Tracé historique

Chargement de la carte...

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class=\"mw-content-ltr mw-parser-output\" lang=\"fr\" dir=\"ltr\"\u003E\u003Cp\u003ERoute d'acc\u00e8s au barrage d\u00e9class\u00e9e le 8-4-1970\n\u003C/p\u003E\u003C/div\u003E","title":"Route d'acc\u00e8s au barrage d\u00e9class\u00e9e le 8-4-1970\n","link":"","strokeColor":"#FCFF07","strokeOpacity":"1","strokeWeight":"5","pos":[{"lat":45.69825,"lon":6.614724},{"lat":45.698183,"lon":6.614451},{"lat":45.698292,"lon":6.614113},{"lat":45.698453,"lon":6.614006},{"lat":45.699236,"lon":6.614569},{"lat":45.699588,"lon":6.615288},{"lat":45.699674,"lon":6.6151},{"lat":45.698985,"lon":6.613383},{"lat":45.698745,"lon":6.613383},{"lat":45.697831,"lon":6.612525},{"lat":45.697134,"lon":6.612031},{"lat":45.696714,"lon":6.611967},{"lat":45.696193,"lon":6.612085},{"lat":45.695837,"lon":6.612407},{"lat":45.69526,"lon":6.612466},{"lat":45.694309,"lon":6.611946},{"lat":45.693769,"lon":6.612697},{"lat":45.693462,"lon":6.613389},{"lat":45.693001,"lon":6.61407},{"lat":45.692536,"lon":6.614601},{"lat":45.691869,"lon":6.61576},{"lat":45.691469,"lon":6.616226},{"lat":45.691582,"lon":6.616656},{"lat":45.691484,"lon":6.616709},{"lat":45.691315,"lon":6.616468},{"lat":45.691207,"lon":6.616092},{"lat":45.69172,"lon":6.615556},{"lat":45.691739,"lon":6.615411},{"lat":45.691641,"lon":6.615384},{"lat":45.691398,"lon":6.615674},{"lat":45.691087,"lon":6.615829},{"lat":45.691004,"lon":6.616103},{"lat":45.691259,"lon":6.616983},{"lat":45.691226,"lon":6.617165},{"lat":45.691087,"lon":6.617128},{"lat":45.690959,"lon":6.616849},{"lat":45.690862,"lon":6.616495},{"lat":45.690708,"lon":6.616173},{"lat":45.69063,"lon":6.616344},{"lat":45.690821,"lon":6.616881},{"lat":45.690903,"lon":6.617203},{"lat":45.690847,"lon":6.617428},{"lat":45.690607,"lon":6.617514},{"lat":45.69039,"lon":6.617718},{"lat":45.690105,"lon":6.618351},{"lat":45.689933,"lon":6.618512},{"lat":45.68976,"lon":6.619155},{"lat":45.689416,"lon":6.619542},{"lat":45.689228,"lon":6.620019},{"lat":45.688906,"lon":6.620121},{"lat":45.687992,"lon":6.619434},{"lat":45.688097,"lon":6.619112},{"lat":45.688052,"lon":6.618962},{"lat":45.687624,"lon":6.619338},{"lat":45.687564,"lon":6.619198},{"lat":45.687782,"lon":6.618973},{"lat":45.687759,"lon":6.618791},{"lat":45.687527,"lon":6.618952},{"lat":45.687167,"lon":6.618823},{"lat":45.687032,"lon":6.619059},{"lat":45.687055,"lon":6.619241},{"lat":45.68701,"lon":6.619456},{"lat":45.686972,"lon":6.619853},{"lat":45.686871,"lon":6.619858},{"lat":45.686841,"lon":6.619231},{"lat":45.686736,"lon":6.618721},{"lat":45.686624,"lon":6.618683},{"lat":45.686601,"lon":6.618876},{"lat":45.686718,"lon":6.619188},{"lat":45.686583,"lon":6.619831},{"lat":45.68659,"lon":6.620529},{"lat":45.686635,"lon":6.62084},{"lat":45.68653,"lon":6.620808},{"lat":45.686358,"lon":6.619799},{"lat":45.686095,"lon":6.619434},{"lat":45.685436,"lon":6.619091},{"lat":45.685046,"lon":6.619091},{"lat":45.684694,"lon":6.619617}]},{"text":"\u003Cdiv class=\"mw-content-ltr mw-parser-output\" lang=\"fr\" dir=\"ltr\"\u003E\u003Cp\u003ETron\u00e7on immerg\u00e9 sous le barrage de Roselend\n\u003C/p\u003E\u003C/div\u003E","title":"Tron\u00e7on immerg\u00e9 sous le barrage de Roselend\n","link":"","strokeColor":"#408080","strokeOpacity":"1","strokeWeight":"5","pos":[{"lat":45.695254,"lon":6.640849},{"lat":45.693126,"lon":6.637502},{"lat":45.691357,"lon":6.636815},{"lat":45.691028,"lon":6.634798},{"lat":45.688659,"lon":6.632009},{"lat":45.68764,"lon":6.627631},{"lat":45.685901,"lon":6.625099},{"lat":45.685272,"lon":6.624498},{"lat":45.685122,"lon":6.62364},{"lat":45.684402,"lon":6.622182},{"lat":45.684162,"lon":6.620808},{"lat":45.684694,"lon":6.619617}]},{"text":"","title":"","link":"","strokeColor":"#FFFACD","strokeOpacity":"1","strokeWeight":"5","pos":[{"lat":45.695254,"lon":6.640849},{"lat":45.694505,"lon":6.642094},{"lat":45.694205,"lon":6.643252},{"lat":45.693606,"lon":6.644454},{"lat":45.692137,"lon":6.64381},{"lat":45.691837,"lon":6.644583},{"lat":45.694415,"lon":6.646729},{"lat":45.695075,"lon":6.648917},{"lat":45.696543,"lon":6.65072},{"lat":45.696393,"lon":6.65132},{"lat":45.695104,"lon":6.651578},{"lat":45.693846,"lon":6.649139},{"lat":45.692736,"lon":6.647716},{"lat":45.693186,"lon":6.650162},{"lat":45.694085,"lon":6.653252},{"lat":45.694535,"lon":6.654668},{"lat":45.694475,"lon":6.655655}]}],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"visitedicon":"","wmsoverlay":false,"zoom":9,"layers":[],"controls":["pan","zoom","streetview","type","scale"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"resizable":false,"kmlrezoom":false,"poi":true,"cluster":false,"clustergridsize":60,"clustermaxzoom":20,"clusterzoomonclick":true,"clusteraveragecenter":true,"clusterminsize":2,"imageoverlays":[],"kml":[],"gkml":[],"searchmarkers":"","fullscreen":false,"mylocation":false,"mylocationfollow":false,"mylocationzoom":-1,"scrollwheelzoom":false,"locations":[{"text":"\u003Cdiv class=\"mw-content-ltr mw-parser-output\" lang=\"fr\" dir=\"ltr\"\u003E\u003Cp\u003EGoncelin\n\u003C/p\u003E\u003C/div\u003E","title":"Goncelin\n","link":"","lat":45.344126,"lon":5.978569,"icon":""},{"text":"\u003Cdiv class=\"mw-content-ltr mw-parser-output\" lang=\"fr\" dir=\"ltr\"\u003E\u003Cp\u003EAncien village de Roselend\n\u003C/p\u003E\u003C/div\u003E","title":"Ancien village de Roselend\n","link":"","lat":45.695254,"lon":6.640849,"icon":""},{"text":"\u003Cdiv class=\"mw-content-ltr mw-parser-output\" lang=\"fr\" dir=\"ltr\"\u003E\u003Cp\u003ECol de M\u00e9raillet\n\u003C/p\u003E\u003C/div\u003E","title":"Col de M\u00e9raillet\n","link":"","lat":45.694942,"lon":6.633509,"icon":""}]}

Légende de la carte ou du tableau
En rouge	Tracé déclassé en 1973.
En jaune	Tracé déclassé en 1970 à Roselend et en 1971 à La Rochette.
En jaune clair	Ancien tracé de la D217 depuis Roselend en direction du Cormet.
En violet	Tronc commun avec la RN90 à Albertville.
En gris	Partie du tracé engloutie après la mise en eau du barrage en 1960.
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.

• Isère (38) - D525
  • Goncelin Château, Église
    • D29 D523 Goncelin Centre
    • La Croix
    • Ruisseau de Chavannes
  • Crêts-en-Belledonne
    • Chavanne
    •  
    • Ruisseau du Rôti
    •  
    • Les Fontaines
    • Les Peillots
    • Le Champ du Pont Le Salin
    • Sailles-le-Bas Marais de Sailles
    • Saint-Pierre-d'Allevard (déviée par le sud-est) D280
    • La Roche Bassin du Flumet
  • Allevard Tour du Treuil, Château, Thermes, Musée Jadis Allevard
    • Les Perrières
    • Allevard 'Centre D525^A
    • Le Breda
    •  
    • L'Épinette
• Savoie (73) - D925
  • Détrier
    • Pont de Détrier
    • Les Granges   D925^B
    •    D202 (vers D207) Lac de Saint-Clair
  • La Rochette Château
    • La Grange du Four
    • Les Rubates D202
  • La Croix-de-la-Rochette  
  • Villard-Sallet Louise Dufour
  • Villard-Léger Les Baraques
  • Bourgneuf
    • Bourgneuf Village D204
    • Cottier
    • Les Teppes
    • La Grande Croix-d'Aiguebelle
  • Aiton
    •   D1006
    • L'Arc
    •    A43   24 
    • Le Publey
    • Le Plan d'Aiton
    • D222 vers D1090
  • Sainte-Hélène-sur-Isère
    • Le Villard Ruisseau du Merderet
    • Sainte-Hélène Village Nant Bruyant   D69
    • Le Rotex Nant Perrin
  • Notre-Dame-des-Millières
    • La Combaz Torrent de la Combe
    • Les Mathiez
    • Le Moutonnet Ruisseau de Fontaine Claire
    • Le Port
    • Le Culet
  • Monthion La Plaine de Monthion
  • Grignon
    • Neveau-le-Bas   D64
    • Grignon Village
    • Pont Albertin L'Isère
  • Albertville
    • Albertville Centre Maison des Jeux Olympiques d'Hiver  N90   30  - D1212

      

      Vue aérienne de l'extrémité de la RN525 à Roselend en 1956, avant l'engloutissement du village. © IGN / Geoportail

    • L'Arly
    • Les Adoubes
  • Venthon
    • Le Doron
    • Le Martellet
  • Queige
    • Les Teppes
    • Les Roengers
    • Pont des Roengers Le Doron de Beaufort
    • Les Îles d'en Bas
    • Les Îles Nant des Îles
    • Le Doron
  • Villard-sur-Doron
    • La Charbonnière
    • Le Doron
    • Villard Village
    • Les Dévies
    • Manant
  • Beaufort Château
    • Dorinet
    • Beaufort Centre
    • Défilé d'Entreroches Le Doron de Roselend
    •   Lacets
    •  
    • Les Fontanus
    •   Nombreux Lacets
    • Le Tartet
    •  Col de Méraillet (1605 m)
    • Barrage de Roselend
    • Roselend (Village englouti)