Route départementale française D21 (69)

Route départementale D21 (69)
La D21 à l'entrée de Saint-Cyr-au-Mont-d'Or. © Google Maps
Localisation
Pays	France
Département	Métropole de Lyon (69M)
Caractéristiques de 1939 à 1999
Itinéraire	Lyon - Saint-Cyr-au-Mont-d'Or
Longueur	4,6 km
Caractéristiques actuelles
Itinéraire	Lyon - Saint-Cyr-au-Mont-d'Or
Longueur	2,1 km

Présentation

• La route départementale D21 (69), ou RD21 (69), est une route départementale de la circonscription départementale du Rhône (69) qui relie Lyon 9^e à Saint-Cyr-au-Mont-d'Or.
• Elle a été partiellement déclassée dans la voirie communautaire du Grand-Lyon en 1999. Seule la portion entre la D73^E et la D89 subsiste.
• Depuis le 1^er janvier 2015, elle est intégralement située sur le territoire de la Métropole de Lyon (69M) qui assure son exploitation en conservant son numéro D21.
• Elle possédait une annexe : la D21^E, qui reliait la D21 à la D65 par la Route de Saint-Fortunat. Elle a également été déclassée en 1999.

Description du tracé

• La D21 débute historiquement dans le 9^e arrondissement de Lyon, au niveau du Rond-point des Monts d'Or. Elle partait vers le nord-ouest sur la Rue de Saint-Cyr.
• Vers la moitié du XX^e siècle, la portion initiale de la Rue de Saint-Cyr a été déclassée et le point de départ de la D21 reporté Quai de la Gare d'Eau, sur la D51.
• Elle récupère la Rue de Saint-Cyr au niveau de la gare de Vaise, puis passe sous les voies ferrées.
• Elle continue Rue de Saint-Cyr jusqu'à l'entrée de Saint-Cyr-au-Mont-d'Or, en étant à la fois à Lyon et à Saint-Didier-au-Mont-d'Or.
• A l'entrée de Saint-Cyr, elle prend le nom de Route de Lyon et continue vers le nord.
• Elle monte jusqu'au centre de Saint-Cyr, passe devant l'église, et s'achève sur l'ancienne D65.

Tracé

Chargement de la carte...

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Légende de la carte ou du tableau
En vert	Tracé de l'ancienne D21E (69M).
En bleu ciel	Tracé actuel de la D21 (69M).
En blanc	Portions déclassées en 1999.
En gris clair	Tracé originel déclassé dans un premier temps
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.

• Métropole de Lyon (69M) - VM
  • Lyon 9^e
    • C51 Quais de Saône
  • Lyon 9^e / Saint-Didier-au-Mont-d'Or D73^E
• Métropole de Lyon (69M) - D21
  • Lyon 9^e
  • Saint-Cyr-au-Mont-d'Or D89
• Métropole de Lyon (69M) - VM
  • Saint-Cyr-au-Mont-d'Or C65 C92