Route nationale française 531

Route nationale 531
Borne de la RN531 encore en place à Sassenage.© G.E.
Localisation
Pays	France
Région	Auvergne-Rhône-Alpes
Caractéristiques de 1933 à 1973
Itinéraire	Bourg-de-Péage - Villard-de-Lans - Grenoble
Longueur	82,4 km

Présentation

• La route nationale 531, ou RN531, est une ancienne route nationale française qui reliait Bourg-de-Péage à Grenoble, via le Massif du Vercors.

Historique

Généralités

• A sa création, en 1933, elle est définie comme la route de Valence-sur-Rhône à Grenoble par Villard-de-Lans.
• Dans la Drôme, elle est issue de la route départementale n° 7, ou RD7 (26). En Isère, elle est issue d'un premier tronçon du chemin de grande communication n° 61, ou Gc61 (38), pour la section comprise entre la limite de la Drôme et Clairivaux, commune de Saint-Just-de-Claix, du chemin de grande communication n° 58, ou Gc58 (38), pour la section comprise entre Clairivaux et la RN518 à l'entrée de Pont-en-Royans, du chemin de grande communication n° 2, ou Gc2 (38), pour la section comprise entre Pont-en-Royans et Villard-de-Lans, du chemin de grande communication n° 6, ou Gc6 (38), pour la section comprise entre Villard-de-Lans et Sassenage, et d'un second tronçon du chemin de grande communication n° 61, ou Gc61 (38), pour la section comprise entre Sassenage et Grenoble.
• Le trajet de Valence à Bourg-de-Péage se faisait alors via la N92.
• Suite à la réforme de 1972, les tronçons de Bourg-de-Péage à Saint-Just-de-Claix et de Sassenage à Fontaine ont été renumérotés en RN532 et le reste de l'itinéraire a été déclassé en D531.
• Il est à noter que la boucle urbaine Fontaine - Grenoble - Fontaine numérotée D531 sur le terrain et longue de 8,3 km n'a jamais fait partie du réseau routier national. Elle emprunte le pont Esclangon mis en service en décembre 1985.
• Axe majeur du Vercors, la D531 a fait l'objet de nombreux travaux visant à assurer sa pérennité et une certaine capacité à écouler un trafic saisonnier important.
• La portion située sur le territoire de Grenoble-Alpes Métropole est exploitée par cette dernière depuis le 1^er janvier 2017.

Aménagements

• Tunnel d'Arbois, sur la commune de Chorange : 2 août 2000.
• Élargissement entre Villard-de-Lans et Sassenage : 1967.
• Déviation de Sassenage : 1967.
• Pont sur le Drac, dans la continuité des grands boulevards de Grenoble : 10 août 1956.
• Suppression du passage à niveau de L'Estacade à Grenoble : 15 octobre 1964.

Autour de la route

• Grenoble.
• Massif du Vercors.
• Gorges de la Bourne.

Tracé historique

Chargement de la carte...

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class=\"mw-parser-output\"\u003E\u003Cp\u003EGrenoble\n\u003C/p\u003E\u003C/div\u003E","title":"Grenoble\n","link":"","lat":45.1880311498319997554062865674495697021484375,"lon":5.71908116340639960384351070388220250606536865234375,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EFontaine\n\u003C/p\u003E\u003C/div\u003E","title":"Fontaine\n","link":"","lat":45.19622700000000037334757507778704166412353515625,"lon":5.6734840000000001936086846399120986461639404296875,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ESassenage\n\u003C/p\u003E\u003C/div\u003E","title":"Sassenage\n","link":"","lat":45.2129910000000023728716769255697727203369140625,"lon":5.66156599999999965433516990742646157741546630859375,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003ESaint-Just-de-Claix\n\u003C/p\u003E\u003C/div\u003E","title":"Saint-Just-de-Claix\n","link":"","lat":45.06354499999999774217940284870564937591552734375,"lon":5.26597500000000007247535904753021895885467529296875,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EBourg-de-P\u00e9age (jusqu'en 1973)\n\u003C/p\u003E\u003C/div\u003E","title":"Bourg-de-P\u00e9age (jusqu'en 1973)\n","link":"","lat":45.040829999999999699866748414933681488037109375,"lon":5.04854200000000030712499210494570434093475341796875,"icon":""},{"text":"\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EBourg-de-P\u00e9age\n\u003C/p\u003E\u003C/div\u003E","title":"Bourg-de-P\u00e9age\n","link":"","lat":45.04041000000000138925315695814788341522216796875,"lon":5.05619700000000005246647560852579772472381591796875,"icon":""}]}

Légende de la carte
En rouge	Tracé cédé à la RN532 en 1978 (déclassé en 2006).
En orange	Ancien tracé à Sassenage déclassé en 1971 et tracé déclassé localement après rectification.
En jaune	Tracé déclassé en 1973.
En vert	Boucle Fontaine - Grenoble - Fontaine
En violet	Tronc commun avec la RN518 à Pont-en-Royans.
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.

De Bourg-de-Péage à Grenoble (de 1933 à 1973)

• Drôme (26) - D2532^N
  • Bourg-de-Péage
    • D2532^N (ex-N92) Bourg Centre Musée de la Pogne (vers D92^N D102 D149 D196 D538 D2092^N)
    • La Parisière
  • Chatuzange-le-Goubet
    • La Roseraie
    • Pizançon
    • Les Chirouses   D532
• Drôme (26) - D532
  • Chatuzange-le-Goubet
    • Les Grenières
    • Canard
    • Le Martinet
  • Beauregard-Barret Les Murettes
  • Jallans
    • L'Écancière
    •  
  • Eymeux Les Fauries
  • La Baume-d'Hostin Les Massotiers D125
  • Saint-Nazaire-en-Royans La Bourne Aqueduc, Église Romane, Tour Médiévale XI-XII^e D76

Panneau sur la D531 à Saint-Just-de-Claix. © G.E.

• Isère (38) - D1532
  • Saint Just-de-Claix
    • Quatre Têtes Site Archéologique
    • Clairivaux
    • Espace Royans  

• Isère (38) - D531
  •  Parc naturel régional du Vercors

    

    Village de Pont-en-Royans, traversé par la RD531 (anciennement RN531). © Mickadu26

  • Auberives-en-Royans
    • Auberives Village
    • Le Mas
  • Pont-en-Royans Bourg Médiéval, Musée de l'Eau
    • Priolées D518
    •  Court tronc commun avec la D518.
    • Pont Picard La Bourne D518
    • Les Prairies
    • Pont Rouillard La Bourne
  • Choranche
    • Métrière
    • Pré Martin
    • Les Pierrones
    • Les Chartreux
    • Ruisseau de Jallifier
    • Choranche
  • Gorges de la Bourne  
  • Rencurel
    • La Balme de Rencurel
    • Le Moulin
    • Basse Valette
    • Pont de la Goule Noire D103

      

      Panneaux Michelin sur le Pont de la Goule Noire. © Détail d'une Carte Postale Ancienne.

    • Grotte de la Goule Verte
    • Grotte de la Goule Blanche
  • Villard-de-Lans
    • Les Jarrands Le Meaudret D106
    • Charpichon
    • Villard-de-Lans Centre Nombreux Monuments
    • Font Noire
    • Les Geymonds  
    • Pont des Âniers Le Plénouse
  • Lans-en-Vercors Église et Prieuré
    • La Côte
    • La Gardette
    • Le Truc (déviée)
    • Les Eymards (déviée)
    • Jaume   D106
    • Verduret Musée de la Magie des Automates
    • L'Olette
  • Gorges d'Engins
  • Engins Les Jaux
  • Gorges du Furon
  •   Lacets
• Isère (38) / Grenoble-Alpes Métropole - D531
  • Sassenage Églises, Châteaux Cuves de Sassenage
    • Les Grandes Côtes   Lacets
    • Hameau du Château  
    •   D1532

• Isère (38) / Grenoble-Alpes Métropole - D1532
  • Sassenage
    • Sassenage Village
    • La Saulée
  • Fontaine
  • Seyssinet-Pariset
    • Pacallaire
    • Les Îles de Seyssinet D106
  • Grenoble Nombreux Monuments  A480 E711 E713   3  N481 D5 D15 D106 D512 D531 D590 D1075 D1087 D1090

Boucle Fontaine - Grenoble - Fontaine (non classée)

• Isère (38) / Grenoble-Alpes Métropole - D531
  • D106 D1532 Fontaine
  • Sassenage
  • Le Drac
  • Grenoble Nombreux Monuments E711 E712 E713  A480   1.1    2  D15 D106 D531^C
  • Le Drac
  • Fontaine D106 D1532