Route nationale 12

You can help expand this article with text translated from the corresponding article in French. (December 2020) Click [show] for important translation instructions. View a machine-translated version of the French article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing French Wikipedia article at [[:fr:Route nationale 12 (France)]]; see its history for attribution. You may also add the template {{Translated|fr|Route nationale 12 (France)}} to the talk page. For more guidance, see Wikipedia:Translation.

The Route nationale 12, or RN12, is a trunk road (

History

This section is missing information about Route nationale 12. Please expand the section to include this information. Further details may exist on the talk page. (December 2019)

Until the 1950s, the RN 12 followed a different itinerary between

Paris-Dreux-Rennes-Brest

Trappes to Dreux (0 km - 62 km)

The road starts southwest of Paris as a branch of the Route nationale 10, the old road at Trappes starting as the Rue de Dreux and heading west. The new road is autoroute standard and starts as an extension of the RN286 at its junction with the A12 autoroute.

Both routes pass round the Étang de Saint-Quentin before merging at

The road leaves Dreux and heads broadly southwest through rolling countryside of southern Normandy. It passes the town of Saint-Lubin-des-Joncherets, now in the upper valley of the river Avre. It next comes to Verneuil-sur-Avre, where the RN26 heads northeast to Caen. The countryside is more wooded now as the road crosses the Les Bois Francs before coming to the Forêt du Perche.

At

At Rennes there are junctions with the RN137, RN136 (E50) and RN24 to Lorient. The RN12 now heads northwest into Brittany also classed the European route E50. The road passes up the Garun valley south of the Forêt de Montauban. The countryside is now a mix of rolling hills and tight river valleys. Due to an old royal act of parliament, roads cannot be tolled within Brittany, and so the RN12 was upgraded to autoroute standard but not numbered as such. The RN12's old course is numbered RD712. The road has a junction with the RN176 (E401) to Dinan. The road passes Lamballe before reaching the coast and a bay at Yffiniac. The road then enters the town and port of Saint-Brieuc on the southwest corner of the Baie de Saint Brieuc on the English Channel.

The RN12 heads west with the old road the RD712. It passes through the Bois de Malaunay before reaching the town of

References